Pub. 988-0154-561
Using LowranceNET NMEA 2000 Devices with LMS-334, LMS-339 & GlobalMap 3600.
The instructions in this document address the operation of a LowranceNET NMEA 2000 network with the LMS-334, LMS-339 and GlobalMap 3600. The following topics are covered in this document. NMEA 2000 Menu On the GPS and Sonar menus (the GlobalMap 3600 only has a GPS menu), the NMEA 2000 entry allows you to configure, calibrate and monitor devices in a LowranceNET NMEA 2000 network. It also provides access to the Buss Setup, Fuel Management and NMEA 2000 Alarm menus. NMEA 2000 alarms are addressed in your unit's manual. Buss Setup From the Buss Setup configuration menu, you can modify the configuration, calibration and advanced option settings of items on the LowranceNET. Internal GPS Receiver The internal GPS receiver in your unit is a non-network device. That means GPS data you receive from the unit will not be transmitted across the network to other network devices. The only way to transmit GPS data across the network is to switch the active antenna setting to read data from an LGC-2000 on the LowranceNET. Fuel Management The Fuel Management menu allows you to maintain and configure fuel flow and fuel consumption.

NMEA 2000 Menu

The NMEA 2000 menu, located on the GPS and Sonar menus in your unit contains three items: Buss Setup, Fuel Management and NMEA 2000 Alarms. NMEA 2000 Alarms are addressed in your unit's manual. To access the NMEA 2000 menu, press MENU, select NMEA 2000 and press ENT.
NMEA 2000 menu (left) with Buss Setup menu (right).
Fuel Management menu (left) with NMEA 2000 Alarms menu (right).

Buss Setup Menu

When Buss Setup is selected, a list of NMEA 2000 devices linked to the LowranceNET will appear. Engine and Tank configuration options are located below the NMEA 2000 Devices list, but only will apply to you if you are using an EP-10 Fuel Flow, EP-15 Fluid Level, EP-50 Storage Device or an Engine Interface.
Engine/Tank Configuration menu
To set Engine and Tank configuration, highlight ENGINE AND TANK CONFIG. and press ENT. 1. Scroll through the Engine/Tank options to select the desired configuration and press ENT. 2. Tank Select allows you to configure the capacity of each tank individually. Highlight TANK SELECT and press ENT. Use Select one of the tank locations: Port, Center or Starboard and press ENT. 2
1 Engine/1Tank highlighted on Engine and Tank Configuration menu (left). Starboard highlighted on Tank Select menu (center). Tank Size set to 40 gallons (right).
3. To input tank capacity, press TANK SIZE and press ENT. Use to enter the first number, then press to the next number. Repeat those steps until the correct tank size has been entered, then press ENT. Repeat Step 3 for each tank. 4. When the correct tank settings have been entered, press to Set Configuration and press ENT. A confirmation message will appear. To confirm the configuration, press |ENT.

NMEA 2000 Devices

To configure items from the Buss configuration list, highlight the desired device and press ENT.
To change the Device Name: 1. Select DEVICE NAME and press ENT.
2. Use to change the first character, then press to input the next character. When desired name has been entered, press ENT.
Buss Configuration list (left). Device Configuration menu for Fuel Flow (center) and Fuel Level (right).

To change Location:

1. From device configuration menu, press to LOCATION and press ENT. 2. Use to select the desired location and press ENT. A confirmation message will appear. To confirm the configuration, press |ENT.

To change Fluid Type:

1. From the device configuration menu, select FLUID TYPE and press ENT. 2. Highlight the desired fluid type Fuel, Water, Gray Water, Live Well, Oil or Black Water and press ENT. A confirmation message will appear. To confirm the configuration, press |ENT.

To change Tank Size:

1. From the device configuration menu, select TANK SIZE and press ENT. 2. Use to change the first digit, then press to the next digit. Repeat those steps until the correct tank size has been entered, then press ENT. A confirmation message will appear. To confirm the configuration, press |ENT.

Calibration

Calibrating Fluid level is an important step to ensuring the status of your tank is correctly transmitted over the NMEA 2000 buss. For example: if you have an odd-shaped tank, like one that is wider at the top than at the bottom, the float inside the tank will tell you there is a half tank of gas when it reaches the midpoint of the tank, regardless of the tanks actual capacity below the midpoint. That could cause you to run out of gas more quickly than expected. Whether the Fluid Type is Fuel, Water, Gray Water, Live Well, Oil or Black Water, calibrating the Fluid Level protects you from unpleasant surprises.

To Calibrate a Device:

From the device configuration menu, press CALIBRATE and press ENT to access the Device Calibration window.

2-Point Calibration

2-Point calibration is best for rectangular or square shaped tanks that allow the fuel level sensor to provide an accurate reading of the fuel level at the top and bottom of the tank. When you select 2-point from the Num Pts menu, the Fluid menu will have two options: Empty Level and Full Level. 1. Highlight NUM PTS, press ENT and select 2. Press ENT.
2. Press to Fluid Level, press ENT, then select the level (EMPTY FULL) that corresponds with your tank's fuel level and press ENT. 3. Press to CALIBRATE and press ENT. The Calibration Done window will appear confirming calibration has been completed. 4. Press ENT|EXIT|EXIT to return to the Buss Setup menu.

Calibrate selected on device configuration menu (left). Calibration menu (right) with calibration instructions listed at the top. 3-Point Calibration
3-point calibration is designed for tanks that vary in shape from the top to the bottom, leading to an inaccurate fuel level sensor reading, in the narrower, bottom portion of the tank. The Fluid Level menu will have three options when 3-point calibration is chosen from the Num Pts menu. The options are: Empty Level, Half Level and Full Level. 1. Highlight NUM PTS, press ENT and select 3. Press ENT.

OR FULL)

2. Press to Fluid Level, press ENT, then select the level (EMPTY, HALF that corresponds with your tank's fuel level and press ENT.
3. Press to CALIBRATE and press ENT. The Calibration Done window will appear confirming calibration has been completed. 4. Press ENT|EXIT|EXIT to return to the Buss Setup menu.

5-Point Calibration

5-point calibration is designed for the most uniquely formed tanks that vary greatly in shape from top to bottom, making an accurate fuel level sensor reading impossible without calibration. When 5-point calibration is chosen from the Num Pts menu, the Fluid Level menu will have five options: Empty Level, 1 Qtr Level, Half Level, 3 Qtr Level and Full Level. 5
1. Highlight NUM PTS, press ENT and select 5. Press ENT. 2. Press to Fluid Level, press ENT, then select the level (EMPTY, 1QTR, HALF, 3QTR or FULL) that corresponds with your tank's fuel level and press ENT.
Num Pts menu with 5-point calibration selected (left). Half level selected on Fluid Level menu (center). Calibration Done window (right).

Advanced Options

When Advanced Options is selected, the Device Data window at the bottom of the Device Configuration menu will be replaced with a pair of categories: Instance and Restore Defaults.
Restore Defaults selected (left). Restore Defaults Confirmation message (center). The Instance dialog box (right). Restore Defaults
The Restore Defaults command gives you the option of resetting all the unit's settings back to factory defaults. 1. From the Device Configuration menu, you can restore the unit's default settings by selecting ADVANCED OPTIONS and pressing ENT. 2. Press to RESTORE DEFAULTS and press ENT, which will launch a confirmation message. To confirm the configuration, press |ENT. 6

Instance

The Instance command is intended for use only by experienced NMEA 2000 network technicians. You should never need this command if you are connecting your unit to a network with similar display units and/or a series of electronic probes. Instance allows network technicians to resolve certain electronic probe conflicts. This is most likely to occur if the network includes LMF-200 or LMF-400 digital gauges, which support the display of fewer electronic probes than your GPS or sonar/GPS unit. If you want to use your unit in a network including one of these digital gauges, you may need to consult customer service.

Internal GPS Receiver

The internal GPS receiver in your unit is a non-network device. That means the GPS data you receive from your unit will not be transmitted across the network to other network devices. The only way to transmit GPS data across the network is to add a LGC-2000 to the LowranceNET.
To switch from internal GPS to LGC-2000 Press MENU, select NMEA 2000 and press ENT. Choose BUSS SETUP and press ENT.
LGC-2000 highlighted on Buss Setup menu (left). LGC-2000 Device Configuration menu with the Set Active checkbox selected (center). LGC-2000 is now listed as Active on the Buss Setup menu (right).
1. From the Buss Configuration list, select LGC-2000 and press ENT. 2. Press to Set Active and press ENT. The LGC-2000 is now the active antenna for your unit. The Internal GPS antenna was automatically disabled when the LGC-2000 was set to active. NOTE: To switch back to the internal GPS antenna, repeat the steps above. The internal GPS will be automatically enabled when you turn off (uncheck) the LGC-2000 Set Active box. 7

Fuel Management

The Fuel Management menu allows you to maintain and configure fuel flow and fuel consumption. To get to the Fuel Management menu, press MENU, select NMEA 2000 and press ENT. Highlight FUEL MANAGEMENT and press ENT.

Fuel Used Location

If there is more than one tank on your vessel, the Fuel Used Location scroll box allows you to select the tank you want to monitor or configure. It can support up to three tank locations: Port, Center and Starboard. 1. If you have more than one tank and want to check other tanks, highlight FUEL USED LOCATION and press ENT. 2. Use to select a different tank location and press ENT.

Fuel Added

The Fuel Added dialog box is used to enter the amount of fuel added to the tank after you have added fuel to your vessel. 1. To input the amount of fuel added to the tank, highlight FUEL ADDED and press ENT. 2. Use to enter the first digit, the press to move to the next number. Repeat those steps until the correct amount of fuel added has been entered, then press ENT.
Fuel Management highlighted on the NMEA 2000 menu (left). Fuel Management menu (right). Add Fuel
When using the EP-10 Fuel Flow on your vessel, you must use either the Add Fuel or Fill Tank commands when fuel is added to the tank. If adding fuel, but not filling the tank, use the ADD FUEL option. 8
1. Highlight the FUEL ADDED dialog box and press ENT. Use to enter the first digit, then press to move to the next number. Repeat those steps until the correct amount of fuel added is input, then press ENT. 2. Press to ADD FUEL and press ENT, which will launch a confirmation message. To confirm the selection of add fuel, press |ENT.

Fill Tank

When using the EP-10 Fuel Flow on your vessel, you must use either the Add Fuel or Fill Tank commands when fuel is added to the tank. The FILL TANK command is used when you refill the fuel tank. It always will be followed by an option to recalibrate the tank. Tank recalibration is described below under the heading To Recalibrate. 1. After the tank has been filled, select FILL TANK from the Fuel Management menu and press ENT. A confirmation message will appear. To confirm the selection of fill tank, press |ENT. 2. That will launch another message window which will give you the option of recalibrating the tank. We just want to fill the tank without recalibrating, so choose NO and press ENT.
Fill Tank highlighted on Fuel Management menu (left). Fill Tank confirmation message (right).
WARNING: Carefully follow these instructions, otherwise fuel calibration could be inaccurate, resulting in incorrect Fuel Management.

To Recalibrate

To calibrate the EP-10 Fuel Flow, you must use the Fill Tank option. 1. After filling the tank, input the amount of fuel added to the tank in the Fuel Added window. Use to enter the first digit, then press to move to the next number. When the correct amount of fuel added has been input, press ENT. 9
2. Highlight Fill Tank and press ENT. A confirmation message will appear. To confirm the selection of fill tank, press |ENT. That will launch the recalibrate window message, but we are not ready to recalibrate yet, so highlight NO and press ENT. 3. Take your boat out and burn at least 5 gallons of fuel. Fill up the tank again, carefully noting how much fuel was added to top off the tank. The amount of fuel added should be very close to the amount of fuel used. If the difference between these two figures is greater than 5 percent, the unit needs to be recalibrated. 4. To recalibrate, input the amount of fuel added to tank in the Fuel Added dialog box, then select FILL TANK and press ENT. A confirmation message will appear. To confirm the selection of fill tank, press |ENT. 5. That will launch a window giving you the option to recalibrate. Press |ENT to recalibrate. 6. The calibration is calculated by comparing the actual fuel used to the calculated fuel used. It is vital to get an accurate reading of the actual fuel used and the amount of fuel added to fill the tank the second time. On multiple engine installations with a single tank configuration, only one engine should be run when calibrating the EP-10 Fuel Flow. This is the only way to know how much fuel has gone through the EP-10 Fuel Flow you want to calibrate.
Reset Calibration highlighted (left). Reset Calibration confirmation window (right). Reset Calibration will return the unit to the factory default calibration settings. To Reset Calibration:

Choosing the Reset Calibration command will set the calibration settings back to factory defaults. 10
1. From the Fuel Management menu, press to RESET CALIBRATION. Press ENT. A confirmation message will appear. To confirm the selection of Reset Calibration, press |ENT.

To Reset Trip:

The Reset Trip function allows you to reset to zero the running tally of how much fuel you have used on a particular trip. 1. From the Fuel Management menu, select RESET TRIP and press ENT. A confirmation message will appear. To confirm the selection of Reset Trip, press |ENT.

To Reset Seasonal:

Your unit can track fuel usage not only for trips, but also for entire seasons. The reset seasonal option allows you to reset the running tally of seasonal fuel usage to zero. 1. From the Fuel Management menu, use to select RESET SEASONAL and press ENT. A confirmation message will appear. To confirm the selection of Reset Seasonal, press |ENT.

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Pub. 988-0154-561 Printed in USA 011206
Copyright 2006 All Rights Reserved Lowrance Electronics, Inc.

Nut Metal washer

Rubber washers Bolt

Metal washer

B. Two-piece bracket: Once you determine the correct position for the ratchets, assemble the transducer as shown in the figure in step 2B. Don't tighten the lock nut at this time. 4. Drilling mounting holes. Hold the transducer and bracket assembly against the transom. The transducer should be roughly parallel to the ground. The transducer's centerline should be in line with the bottom of the hull. Don't let the bracket extend below the hull! Mark the center of each slot for the mounting screw pilot holes. You will drill one hole in the center of each slot. Drill the holes. For the one-piece bracket, use the #29 bit (for the #10 screws). For the two-piece bracket, use the #20 bit (for the #12 screws). 20

Transom Transom

Position transducer mount on transom and mark mounting holes. Side view shown (left) and seen from above (right).
5. Attaching transducer to transom. A. One-piece bracket: Remove the transducer from the bracket and re-assemble it with the cable passing through the bracket over the bolt as shown in the following figures.
For single-frequency Skimmer, route cable over bolt and through bracket. Side view shown (left) and seen from above (right).
Both bracket types: Attach the transducer to the transom. Slide the transducer up or down until it's aligned properly with the bottom of the hull as shown in the preceding and following figures. Tighten the bracket's mounting screws, sealing them with the sealant compound. Adjust the transducer so that it's parallel to the ground and tighten the nut until it touches the outer washer, then add 1/4 turn. Don't over tighten the lock nut! If you do, the transducer won't "kick-up" if it strikes an object in the water.

Bottom of hull

Flat-bottom hull Deep-"vee" hull Align transducer centerline with hull bottom and attach transducer to transom. Rear view of dual-frequency Skimmer shown.
6. Route the transducer cable through or over the transom to the sonar unit. Make sure to leave some slack in the cable at the transducer. If possible, route the transducer cable away from other wiring on the boat. Electrical noise from the engine's wiring, bilge pumps, VHF radio wires and cables, and aerators can be picked up by the sonar. Use caution when routing the transducer cable around these wires. WARNING: Clamp the transducer cable to the transom close to the transducer. This can prevent the transducer from entering the boat if it is knocked off at high speed. If you need to drill a hole in the transom to pass the connector through, the required hole size will be 5/8". Caution: If you drill a hole in the transom for the cable, make sure it is located above the waterline. After installation, be sure to seal the hole with the same marine grade above- or below-waterline sealant used for the mounting screws. 7. Make a test run to determine the results. If the bottom is lost at high speed, or if noise appears on the display, try sliding the transducer bracket down. This puts the transducer deeper into the water, hopefully below the turbulence causing the noise. Don't allow the transducer bracket to go below the bottom of the hull! Trolling Motor Bracket Installation (single-frequency only) 1. Attach the optional TMB-S bracket to the transducer as shown in the following figure, using the hardware supplied with the transducer. (Note: The internal tooth washer is supplied with the TMB-S.)

Spread epoxy here

Sand this surface (unit's face) Orient the Skimmer with the nose facing the bow of the boat. To bow
Epoxy transducer to hull.
WARNING: Use only the epoxy available from LEI. It has been formulated to work with these installation procedures. Other epoxy types may be too thin or may not cure to the right consistency for optimum transducer performance. 2. The epoxy consists of the epoxy itself and a hardener. Remove the two compounds from the package and place them on the paper plate. Thoroughly stir the two compounds together until the mixture has a uniform color and consistency. Do not mix too fast or bubbles will form in the epoxy. After mixing, you have 20 minutes to complete the installation before the epoxy becomes unworkable. Spread a thin layer of epoxy (about 1/16" or 1.5 mm thick) on the face of the transducer as shown in the previous figure. Make sure there are no air pockets in the epoxy layer! Then, apply the remaining epoxy to the sanded area on the hull. 3. Press the transducer into the epoxy, twisting and turning it to force any air bubbles out from under the transducer face. Stop pressing when you bottom out on the hull. When you're finished, the face of the transducer should be parallel with the hull, with a minimum amount of epoxy between the hull and transducer. 4. Apply a weight, such as a brick, to hold the transducer in place while the epoxy cures. Be careful not to bump the transducer while the epoxy is wet. Leave the weight in place for a minimum of three hours. Allow the epoxy to cure for 24 hours before moving the boat. 5. After the epoxy has cured, route the cable to the sonar unit and it's ready to use. 27
Speed/Temperature Sensors
Optional Speed Sensor Installation All the units in this series can display speed and distance traveled, but only the LMS-339cDF iGPS comes packed with a speed sensor. If you want to purchase an optional additional sensor for your unit, refer to the accessory ordering information inside the back cover of this manual. The following instructions describe how to install the speed sensor. Recommended tools for this job include: drill, 7/8" drill bit, 1/8" drill bit for pilot holes, screwdriver. Required supplies for this job include: four #8 stainless steel wood screws (3/4" long), high quality, marine grade above- or below-waterline sealant. First find a location on the boat's transom where the water flow is smoothest. Don't mount the sensor behind strakes or ribs. These will disturb the water flow to the speed sensor. Make sure the sensor will remain in the water when the boat is on plane. Also make sure the location doesn't interfere with the boat's trailer. Typically, the sensor is mounted about one foot to the side of the transom's centerline. Once you've determined the proper location for the unit, place the sensor on the transom. The bottom of the bracket should be flush with the hull's bottom. Using the sensor as a template, mark the hull for the screws' pilot holes. Drill four 1/8" holes, one in each end of the slots. Mount the sensor to the hull using #8 stainless steel wood screws (not included). Use a high quality, marine grade above- or below-waterline sealant to seal the screws. Make sure the sensor is flush with the bottom of the hull and tighten the screws.

Com-1 wiring to transmit NMEA position information to another NMEA-compatible device.

Sonar socket

Power/Data socket

Network socket

NMEA 0183 Data cable (four wires)
Optional speed sensor NMEA 2000 Power cable Power Supply cable Transducer
LMS-334c iGPS and LMS-339cDF iGPS cable connections.
Mounting the Unit: Bracket or Portable
You can install the sonar unit on the top of a dash with the supplied gimbal bracket. It can also be mounted on a portable power supply. If you use the supplied bracket, you may be interested in the optional R-A-M bracket mounting system. This converts the unit's gimbal bracket to a swivel mount.
Optional R-A-M mounting system.
Bracket Installation Mount the unit in a convenient location, provided there is clearance behind the unit when it's tilted for the best viewing angle. This must be a location with a clear view of the sky, so the internal GPS antenna can lock-on to satellite signals. Make sure there is enough room behind the unit to attach the power and transducer cables. Holes in the bracket's base allow wood screw or through-bolt mounting. You may need to place a piece of plywood on the back side of thin fiberglass panels to reinforce the panel and secure the mounting hardware.
Front Install the gimbal bracket. Position the bracket so the arms slope toward the front of your unit.
Drill a 1-inch (25.4 mm) hole in the dash for the power and transducer cables. The best location for this hole is immediately under the gimbal bracket location. This way, the bracket can be installed so that it covers the hole, holds the cables in position and results in a neat installation. Some customers prefer to mount the bracket to the side of the cable hole. It's a matter of personal preference.

72.9 [2.87] 23.4 [0.92]

173.9 [6.85]

137.9 [5.43]

157.9 [6.22]

Millimeter [Inch]

56.9 [2.24]
Front view (left) and side view (right) showing dimensions of the unit when mounted on gimbal bracket.
Pass the power cable's bare-wire end down though the hole from the top. If you want, you can fill in the hole around the cables with a good marine sealant. (Some marine dealers stock cable hole covers to conceal the opening.) No matter what type of installation you prefer, be sure to leave enough slack in the cables to allow tilting or swiveling the unit. If you choose to fill in the hole, be sure to position the cables against the rear edge of the hole as you apply the fill material. Before positioning the bracket, be sure to hold the cables against the rear edge of the hole. Then, slide the bracket over the hole and butt the rear of the bracket base firmly against the cables, pinning them in place against the side of the hole. Finally, fasten the bracket to the dash. Attach the unit to the gimbal bracket using the supplied gimbal knobs and washers.

Power/lights on and off

To turn on the unit, press PWR. As the unit powers up, the Map Page is displayed first. To switch to the Sonar Page, press PAGES| to SONAR|EXIT. To turn on the backlight, press PWR again. The unit has three backlight levels. Repeatedly pressing PWR will cycle through the backlight settings and turn off the backlight. Turn off the unit by pressing and holding the PWR key for 3 seconds.

Main Menu

The unit has a Main Menu, which contains function and setup option commands. The instructions in this section will deal only with sonar functions, the basic commands that make the unit show sonar signals on your screen. This sonar unit will work fine right out of the box with the factory default settings. But, if you want to learn about the various sonar options, see Sec. 4, Sonar Options & Other Features. (For general system setup and GPS options, see Sec. 8, System Setup and GPS Setup Options.) You can access the Main Menu from any of the four Page screens by pressing MENU|MENU. To clear the menu screen and return to the page display, press EXIT. (Remember, our text style for "MENU|MENU" means "press the Menu key twice." See a full explanation of our instruction text formatting on pages 11, "How to use this manual." 42

Main Menu.

The Main Menu commands and their functions are: Screen: changes the contrast or brightness of the display screen. Sounds: enables or disables the sounds for key strokes and alarms and sets the alarm style. Transparency: adjusts the level of transparency for menus. Alarms: turns sonar and GPS alarms on or off and changes alarm thresholds. Route Planning: used to plan, view or navigate a route. My Trails: shows, creates and deletes plot trails. Also used to navigate or backtrack a trail. Cancel Navigation: turns off the various navigation commands. Used to stop navigating after you have reached your destination. Sonar Setup: sets sonar options. GPS Setup: sets GPS receiver options. System Setup: sets general configuration options. Sun/Moon Calculations: finds the rising and setting time of the sun and the moon. Trip Calculator: shows trip status and statistics. Timers: controls the up timer, down timer and alarm clock settings. Browse MMC Files: allows you to view files on an MMC card.

Sonar Operations

As you can see from the quick reference on the previous page, basic operation is pretty easy, right out of the box. If you are a sonar novice, try operating the unit with the factory defaults until you get a feel for how it's working. As you are learning the basics, there is one setting you might want to tinker with from time to time Sensitivity. Sensitivity controls the unit's ability to pick up echoes. If you want to see more detail, try increasing the sensitivity, a little at a time. There are situations when too much clutter appears on the screen. Decreasing the sensitivity can reduce the clutter and show the strongest fish echoes, if fish are present. As sensitivity is adjusted, you can see the difference on the scrolling chart.

Fig. 1 Fig. 2

Fig. 3

Fig. 4

These figures show results of different sensitivity levels on the same location. Fig. 1: Sensitivity at 88 percent, determined by Auto Sensitivity. Typical of full auto mode. Fig. 2: Sensitivity set at 75 percent. Fig. 3: Sensitivity set at 50 percent. Fig. 4: Sensitivity set at 100 percent.
You can change the sensitivity level whether you are in Auto Sensitivity mode or Manual Sensitivity mode. The adjustment method works the same in both modes, but it gives you slightly different results. Adjusting sensitivity in Auto Sensitivity Mode is similar to manually adjusting a car's speed with the accelerator pedal while cruise control is on. You can tell the car to run faster, but when you let off the gas the cruise control automatically keeps you from running slower than the minimum speed setting. In the unit, auto mode will let you increase sensitivity to 100 percent, but the unit will limit your minimum setting. This prevents you from turning sensitivity down too low to allow automatic bottom tracking. When you change the setting with auto turned on, the unit will continue to track the bottom and make minor adjustments to the sensitivity level, with a bias toward the setting you selected. Adjusting sensitivity in Manual Sensitivity Mode is similar to driving a car without cruise control you have complete manual control of the car's speed. In the unit, manual mode allows you to set sensitivity at 100 percent (maximum) or zero percent (minimum.) Depending on water conditions, the bottom signal may completely disappear from the screen when you reduce sensitivity to about 50 percent or less! Try adjusting sensitivity in both auto and manual modes to see how they work. To adjust sensitivity: 1. Press MENU|ENT. 2. The Sensitivity Control Bar appears. Press to adjust sensitivity. When it's set at the desired level, press EXIT.

Sonar Features menu with a frequency of 200 kHz selected.
To change the frequency setting to 50 kHz: 1. From the Sonar Page, press MENU| to SONAR FEATURES|ENT. 2. Press to 50 KHZ|ENT. 3. Press EXIT|EXIT to close the menu. To change the frequency setting to 200 kHz: 1. From the Sonar Page, press MENU| to SONAR FEATURES|ENT. 2. Press to 200 KHZ|ENT. 3. Press EXIT|EXIT to clear the menu.

HyperScroll

See the entry on Ping Speed, which controls the HyperScroll feature.

Log Sonar Chart Data

If you have an MMC installed in the unit, the sonar data shown on the screen can be saved to the MMC. This can be played back at any time. If you have a personal computer and Internet access, visit our web site, www.lowrance.com and download the free Sonar Viewer and emulator for your unit. These programs will allow you to replay sonar logs on your personal computer.
Sonar Page menu with the Log Sonar Chart Data command selected (left). Sonar Chart Logging menu, with the Start Logging command selected (right). The menu says the MMC has 5.42 MB of free space, which will record the scrolling chart for 28 minutes and 44 seconds.
To record or log chart data: 1. Press MENU| to LOG SONAR CHART DATA|ENT. 2. To record data using the default settings, press ENT. The menu clears and the Sonar Page title bar shows the name of the file you are recording. Warning messages will appear as recording time starts to run out. NOTE: You can change any of the settings by using the cursor arrows to highlight different commands. Select FILE NAME if you want to change the name. Select CHART QUALITY if you want to lower the file quality and record for a longer period of time. After you have changed the settings, select START LOGGING and press ENT.

NMEA 2000

On the Sonar menu, the NMEA 2000 entry provides a way to monitor, configure and calibrate devices on the LowranceNet. For more information, see the document, Instructions for Using LowranceNET NMEA 2000 Devices with LMS-334, LMS-339 and GlobalMap 3600. If the document is missing, download it free at www.lowrance.com or contact customer service.

Noise Rejection

See the entry on Advanced Signal Processing in this section.

Overlay Data

On any Page display except Satellite Status, you can float or overlay additional GPS or navigation data on the screen with the Overlay Data 70
command. For example, if you left your watch at home, you could display the local time on top of the map. Or, if you wanted to see details about your route and trip, you could show your bearing, course, average speed and trip distance. The various data available from your unit are divided into categories in the Overlay Data menu. These categories include GPS Data, Navigation, Trip Calculator, Time, Sonar Data and Miscellaneous Data. You can select items from any of these categories for display, in any combination the category divisions are there only to help you sort through the information.

Section 6: Basic GPS Operations
This section addresses the unit's most basic GPS operations. The tutorials presented in Sec. 6 follow a chronological order. Sec. 7, Advanced GPS Operations, will discuss other more advanced functions and utilities. Material in Sec. 7 is arranged in alphabetical order. Before you turn on the unit and find where you are, it's a good idea to learn about the different keys, the four Page screens and how they all work together. BUT, if you just can't wait to get outside, turn to the one-page Quick Reference on page 108.

LMS-339cDF iGPS

1. PWR/LIGHT The PWR key turns the unit on and off and activates the backlight. 2. PAGES Pressing the Pages key and the arrow keys switches the unit between the four page screens: Satellite Status Page, Navigation Page, Map Page and Sonar Page. 3. MENU Press the Menu key to show the menus and submenus, which allow you to select a command or adjust a feature. It accesses search functions for streets, intersections, addresses and highway exits. 95
4. ARROW KEYS The arrow keys are used to navigate through the menus, make menu selections, move the map cursor and sonar chart cursor and enter data. 5. ENT/ICONS The Enter key allows you to save data, accept values and execute commands. It is also used to create event marker icons. 6. EXIT The Exit key lets you return to the previous screen, clear data or close a menu. 7. WPT The Waypoint key is used to save and recall waypoints, search for waypoints and access the waypoint list. It also launches the Point-of-Interest (POI) search menus and is involved in some navigation functions. 8. ZOUT This Zoom Out key lets you zoom out the display. On the Sonar Page, this key returns you to a full sonar chart display, showing the entire water column from surface to bottom. On the Map Page, this lets you see a larger geographic area on the map with less detail. 9. ZIN This Zoom In key lets you zoom in the display. On the Sonar Page, it enlarges fish signals and bottom detail. On the Map Page, it lets you see greater detail in a smaller geographic area on the map.
To turn on the unit, press PWR. As the unit powers up, the Map Page is displayed. To switch to another page, press PAGES| to Page Name|EXIT. To turn on the backlight, press PWR again. The unit has three backlight levels. Pressing PWR will cycle through the backlight settings. Turn off the unit by pressing and holding the PWR key for 3 seconds.

Find Your Current Position
Finding your current position is as simple as turning the unit on. Without obstruction from dense foilage, terrain or structures, the unit automatically searches for satellites and calculates its position in approximately one minute or less. If for some reason satellite acquisition takes longer, you may be inside a structure or vehicle or in terrain that is blocking signal reception. To correct this, be sure you are positioned so that the unit's antenna module has as clear a view of the sky as possible, then turn the unit off and back on again.
Moving Around the Map: Zoom & Cursor Arrow Keys
The map is presented from a bird's eye view. The current zoom range shows in the lower left corner of the screen. 1. Press the ZIN key (zoom in) to move in closer and see greater detail in a smaller geographic area. 2. Press the ZOUT key (zoom out) to move farther away and see less map detail, but a larger geographic area. When you are traveling, the map will automatically move as you move. This keeps your current location roughly centered on the screen. You can manually pan or scroll the map northward, southward, eastward or westward by using the arrow keys, which launch the cursor crosshairs. This allows you to look at map places other than your current position. To clear the cursor, press EXIT, which jumps the map back to the current position or the last known position.
Use the cursor to determine the distance from your current position (or last known position, when working indoors) to any map object or location. Use the arrow keys to position the cursor over the object or place. The distance, measured in a straight line, appears in the popup data box. Press EXIT to clear the cursor.
Cursor line Cursor line Selected airport POI pop-up data box Distance measured by cursor The selected airport is 4.2 miles to the northwest.
Selecting Map Item With the Cursor
1. Use the zoom keys and the arrow keys to move around the map and find the item you want to select. 2. Use the arrow keys and center the cursor cross-hair on the desired object. On most items, a pop-up box will give the name of the selected item.

On the Map Page, the trail you are navigating is represented by a dotted line that alternates with a flashing solid line. The Navigation Page will also show the navigated trail as a dotted line. The bearing arrow on the compass rose points to the next waypoint on the trail. As you travel, the arrival alarm will go off when you near a trail waypoint, and the bearing arrow on the compass rose will swing around and point to the next trail waypoint. Press EXIT to clear the alarm. 121
North Present position arrow

Trail point

Trail dotted line
Navigate trail, map views: Driver is northbound heading straight toward trail point 6 (left). Northbound driver has reached point 6 and has turned west to follow trail (right). Track or compass heading indicator Trail waypoint symbol Course line made from trail Cross track error range (off course indicator)

Bearing arrow

Arrival alarm
Navigate trail, navigation page views: driver is northbound heading straight toward trail point 6 (left); bearing arrow shows the trail point is due north. Driver has reached trail point 6 and must turn west to follow the trail (right). Arrival alarm goes off and bearing arrow swings around toward the next waypoint.
Navigate a Back Trail 1. Press MENU|MENU| to MY TRAILS|ENT. 2. Press to Saved Trail list, then use to select the desired Trail Name|ENT. 3. Press to NAVIGATE|ENT. 4. Press to REVERSE|ENT| to NAVIGATE|ENT. The unit shows navigation information along the trail, in reverse. NOTE: If you are already located at or near the end of your trail, the arrival alarm will go off as soon as you hit Enter. Just press EXIT. 5. Begin moving and let your unit guide you. 122
6. When you reach your destination, be sure to cancel your navigation: press MENU|MENU| to CANCEL NAVIGATION|ENT. A confirmation message will appear. Press |ENT. Transfer Custom Maps and GPS Data Files

Custom Maps:

Custom maps work only from the MMC card or SD card. When a card containing a Custom Map File is loaded into the unit, the unit automatically loads the map into memory when the unit is turned on. Instructions for copying Custom Map Files to an MMC are contained in the instruction manual for your MMC card reader and MapCreate 6 software. For instructions on inserting an MMC into the unit, see Sec. 2, Installation/Accessories.

GPS Data files:

GPS Data Files contain waypoints, routes, trails and event marker icons. Instructions for copying GPS Data Files between your computer and an MMC are contained in the instruction manual for your MMC card reader and MapCreate 6 software. GPS data automatically recorded in the unit's internal memory must be saved to the MMC in order to store it on your personal computer. GPS Data Files stored on an MMC must be copied from the card to the unit's internal memory before the unit can read them. 1. Insert the MMC into your unit. Press MENU|MENU| to SYSTEM SETUP|ENT| to TRANSFER MY DATA|ENT and the screen below appears.

Routes

A route is a series of waypoints, linked together in an ordered sequence to mark a course of travel. You can visualize a route as a string of beads. The beads represent waypoints and the string represents the course of travel connecting waypoint to waypoint. The course from one waypoint to the next is a leg. Routes are composed of one or more legs. The legs of all GPS routes are based on straight lines between waypoints. A route provides the automatic capability to navigate through several waypoints without having to reprogram the unit after arriving at each 129
waypoint. Once programmed into the GPS unit, a route provides the option of navigating forward through the route waypoints or in reverse order (you can even begin navigating in the middle of a route!) Create and Save a Route You have the option of creating and editing a route in the unit, or you can make a route on your computer with our MapCreate 6 software.

PC-created Routes

MapCreate is the easiest method for preparing a route, because your PC's larger screen, keyboard and mouse are easier to manipulate than the unit. To load a MapCreate route into the unit, follow instructions in MapCreate's manual for creating a route and saving it as part of a GPS Data File (file format *.usr). Copy the GPS Data File to an MMC and insert the MMC in the unit. (See Sec. 2 for instructions on installing MMCs. To load the GPS Data File into the unit's memory, see the entry on Transfer Custom Maps & GPS Data Files in Sec. 6, Basic GPS Operations.)
Routes Created in the Unit
You can create a route by selecting existing waypoints from the waypoint list or you can set a series of route waypoints on the map with cursor arrows and the Enter key. In this example, we'll create a route from the map. 1. From the NAVIGATION PAGE, press MENU|ENT or from the MAP PAGE, press MENU|MENU| to ROUTE PLANNING|ENT. Select NEW ROUTE and press ENT.
Route Planning command on Main Menu (left). will open the Route List screen (right).
2. Press to (END OF ROUTE)|ENT| to ADD FROM MAP|ENT. The Map Page appears with the cursor showing. 130
Edit Route menu (left). Edit Route Waypoints menu (right) with Add From Map command selected.
3. Use the Zoom keys and arrow keys to move the map and cursor until the cursor is centered on the spot where you want your route to begin. If you are starting at your current position or the current cursor position, you are already at the starting spot. 4. Press ENT to set the first waypoint. In the example below, we started the route at the intersection of 11th Street and 145th E. Ave.

ring diameters are based on the current zoom range. For example: at the 100 mile zoom, the screen will show two rings with your current position in the center. The large ring touching the left and right sides of the screen is 100 miles in diameter (same as the zoom range). The second smaller ring is 50 miles in diameter (always 1/2 the zoom range). The distance from your current position to the smaller ring (the ring's radius) is 25 miles (always 1/4 the zoom range). With the arrow keys and map cursor, you can scroll the map to see the third and fourth rings. In this example, the distance to the third ring is 75 miles and distance to the fourth ring is 100 miles from your current position. To set range rings: From the Map Data menu, press to RANGE RINGS. With the option highlighted, press ENT to turn it on (check) or turn it off (uncheck). To set Lat/Long Grid: From the Map Data menu, press to
LAT/LON GRID LINES. With the option highlighted, press ENT to turn it on (check) or turn it off (uncheck). Press EXIT|EXIT to return to the main

page display.

Map Datum Selection
Maps and charts are based on a survey of an area covered by the map or chart. These surveys are called Datums. Maps using different datums will show the same latitude/longitude in different locations. The GPS system used in this unit is the WGS-84 datum, which covers the entire world. Other datums may also cover the entire world or just a small portion of it. It, however, can show your position using any of 191 datums To change the datum: 1. Press MENU|MENU| to GPS SETUP|ENT| to DATUM SELECTION|ENT. 2. Select the desired datum and press ENT. 3. To return to the main page display, press EXIT repeatedly. Datum options for this unit are listed in the back of this manual.

The Map Datum Menu.

Map Detail Category Selection
This menu determines which of the mapping features are shown on the screen. This includes, waypoints, trails, icons, cities and highways, etc. You can turn on or off any of these items to customize the map. To get to Map Categories: 1. From the Map Page, press MENU| to MAP CATEGORIES DRAWN|ENT. 2. Press to select a category or press and to select a subcategory. Press ENT to turn on (check) or turn off (uncheck) a category or subcategory. 3. To return to the last main page display, press EXIT|EXIT.

Overlay Data Shown, with Water Temp selected (left). Press ENT to access REMOVE option (center). Press ENT again to remove item and return to Overlay Data Shown (right).
To move Overlay Data: You may find it useful to rearrange data on your display window. 1. From one of the Map Pages, press MENU| to OVERLAY DATA|ENT. 2. You'll see a list of the overlay data currently displayed. Select the item you want to move and press ENT| to MOVE|ENT. 3. The data begins to flash on your screen. Use , to move the data to a new location on the screen. 4. When the data is in the desired position, press EXIT|EXIT. NOTE: The Customize command and the Overlay Data command both use the same information categories. The difference between the two options is the Customize command changes only the data boxes on a screen, while the Overlay Data command changes only the information displayed directly on the screen.
Closing Speed in the overlay data shown menu (left). The size of the Closing Speed display has been changed from small to enormous.
To change displayed data font size:
1. From the Map or Sonar page, press MENU| to OVERLAY DATA|ENT. 2. Press to select the desired Data, then use to change its size. 3. Press EXIT to get back to the main page display, where the data will be displayed in its new size. NOTE: Some data types can be displayed in only one font size. If that is the case, the Data Size box will not be displayed for that data type.

Pop-up Help

Help is available for most all menu items in this unit. By highlighting a menu item and leaving it highlighted for a few seconds, a pop-up message appears that describes the function of the item. This feature is on by default. To activate Popup Help: Press MENU|MENU| to SYSTEM SETUP|ENT| to POPUP HELP. With the option highlighted, press ENT to turn it on (check) or turn it off (uncheck). After the option is set, press EXIT|EXIT to return to the page display.
The Pop-Up message that appears for Sounds.
To reset all features to factory defaults: 1. Press MENU|MENU| to SYSTEM SETUP|ENT| to RESET OPTIONS|ENT| to YES|ENT. NOTE: Reset Options does not erase any waypoints, routes, icons, plot trails or sonar logs. 166
The Reset Options highlighted on System Setup menu (left). Reset Options confirmation message (right).
Screen Contrast and Brightness
To access the Screen menu, press MENU|MENU|ENT. The CONTRAST slider bar is selected. Press to adjust the constrast.
Contrast bar selected (left). Display Mode menu (right).

To adjust the display's brightness: Press to BRIGHTNESS. Press to adjust the brightness level. To adjust the screen's display mode: Press to DISPLAY MODE|ENT. Use to select the desired mode|EXIT.

Set Language

This unit's menus are available in 10 languages: English, French, German, Spanish, Italian, Danish, Swedish, Russian, Dutch and Finnish.
To select a different language: 1. Press MENU|MENU| to SYSTEM SETUP|ENT. 2. Press to SET LANGUAGE|ENT. 3. Use to select the desired language and press ENT. All menus now appear in the selected language.

Set Local Time

Using the local time setting is useful when estimating local arrival time. The time and date are saved when a waypoint is created. To access the Set Local Time menu, you must acquire your position. Once a position is acquired, press MENU|MENU| to SYSTEM SETUP|ENT| to SET LOCAL TIME|ENT. To set Local Time: Press ENT. Use to change the first character, then press to move the cursor to the next character. Repeat until the time is correct, then press ENT. To set the Month: Press to MONTH|ENT. Use to select the month, then press ENT. To set the Day: Press to DAY|ENT. Use to select the day, then press ENT. To set the Year: Press to YEAR|ENT. Use to select the year, then press ENT. To adjust Time Format: Press TIME FORMAT. Highlight 12 HOUR OR 24 HOUR and press ENT to turn on (check) or turn off (uncheck) the desired setting. To adjust Date Format: Press DATE FORMAT. Highlight the desired option and press ENT to turn it on (check) or turn it off (uncheck). The last field in this menu is CONFIG DST. It allows your unit to automatically adjust to Daylight Saving Time you should only have to set it once. You may select which set of rules matches DST in your region or accept the default. Press EXIT repeatedly to get back to the main page display.

Show WAAS Alarm

When the signal is available, your unit will automatically use WAAS to boost the accuracy of the position fix. When the WAAS signal is lost or acquired, an alarm message appears. Since the U.S. government is still developing the WAAS system, it's not unusual for a GPS/WAAS receiver to frequently lose and reacquire its lock on a WAAS satellite. That can result in the alarm repeatedly going on and off. 168
If you want, you have the option of turning off the WAAS Acquired/Lost alarm without affecting how the unit uses WAAS. 1. Press MENU|MENU| to GPS SETUP|ENT| to SHOW WAAS ALARM. 2. With the option highlighted, press ENT to turn it on (check) or turn it off (uncheck). Press EXIT|EXIT to return to the main page display.
Software Version Information
From time to time, Lowrance updates the operating system software in some of its products. These software upgrades are usually offered to customers as free downloads from our web site, www.lowrance.com. These upgrades make the unit perform better or introduce a new feature or function. You can find out what software version is running in your unit by using the Software Information command. 1. Press MENU|MENU| to SYSTEM SETUP|ENT| to SOFTWARE INFO|ENT. The unit's software information will be displayed. 2. To return to the main page displayed, press EXIT repeatedly.