DOPPLER SPEED LOG

Model DS-50
s Complies with IMO Resolution
MSC.36 (63), MSC.96 (72), A.694 (17), A.824 (19), IEC 61023 and other national regulations
s Displays ship's fore-aft and portstarboard speeds along with distance run and keel clearance
s Highly precise and stable
measurement by using advanced three-beam transmission technology
s Compact display unit for ease of

installation

s Auto mode for continuous readout of

ship's speed

s A variety of analog/digital speed
indicators are optionally available for monitoring at a remote location
s Signal outputs of analog/digital
speed data and distance run for external equipment
The FURUNO DS-50 is a Doppler Speed Log designed to meet the IMO Resolution, IEC specifications and other national regulations. Its three-beam transmission reduces the effect of pitch and roll for high accuracy and enables the measurement of port-stbd speed as well as fore-aft speed. Keel clearance information is provided to assist with shallow water navigation. The DS-50 measures and displays the ship's overthe-ground or through-the-water speed based on the Doppler effect. Speed data can be output to
external equipment such as ARPAs, INS and IBS. There are three operation modes: Ground-tracking, Water-tracking and Auto. The Auto mode continuously displays ships speed, switching between Ground-tracking and Water-tracking automatically. The DS-50 consists of a display unit, processor and transducer. The compact design of the display unit allows flexible installation on the bridge. For monitoring at remote locations, analog and digital indicators are optionally available.

Catalogue No. M-1517c

The future today with FURUNO's electronics technology.
FURUNO ELECTRIC CO., LTD.
9-52 Ashihara-cho, Nishinomiya City, Japan Telephone: +81 (0)798 65-2111 Telefax: +81 (0)798 65-4200, 66-4622 URL: www.furuno.co.jp
TRADE MARK REGISTERED MARCA REGISTRADA

SPECIFICATIONS OF DS-50

DISPLAY UNIT
Two-digit LED for display of port-stbd speed Three-digit LED for display of fore-aft speed Seven-digit LED for display of distance run/keel clearance
EQUIPMENT LIST (Specify type of processor unit when ordering) Standard for installation with DS-510 (Transceiver unit built in)
1. Main display unit DS-500 2. Processor unit DS-510 (Transceiver built in) 3. Transducer DS-530 with 20 m cable 4. Transducer tank DS-531 5. Installation materials and spare parts

ULTRASONIC FREQUENCY

440 kHz

NUMBER OF BEAMS

3 beams for dual axis speed indication
MEASURING RANGE AND ACCURACY Ship's speed
Fore-Aft: Port-Stbd: -10.0 to 40.0 knots -9.9 to 9.9 knots
Measurable depth of ship's speed
Ground tracking: 1 to 200 m below hull bottom Water tracking: 2 to 25 m below hull bottom Total distance run: 0 to 99999.99 nm
Standard for installation with DS-511 (Transceiver unit separated) 1. Main display unit DS-500 2. Processor unit DS-511 3. Transducer DS-530 with 20 m cable 4. Transducer tank DS-531 or Gate valve DS-532 (specify when ordering) 5. Transceiver unit DS-520 6.Installation materials and spare parts Optional (Common) 1. Analog indicator DS-381/382 2. Digital indicator DS-350 (LCD display, waterproof)/351 (LED display) 3. Distance indicator DS-730 4. Distribution box DS-370 5. Range switch box DS-389 6. Junction box DS-360 7. Junction box CI-630 8. Extension cable between DS-510-CI-630/DS-520-CI-630 66S1067 (10, 15, 20, 30 or 100 m) 9. Remote box DS-501 for Main display

Accuracy

Ship's speed: Distance run: Keel clearance: 1% or 0.1 kt, whichever is greater 1% or 0.1 nm, whichever is greater 1% or 0.1 m, whichever is greater (At 1,500 m/s sound velocity)
INPUT/OUTPUT SIGNALS Input 2 ports for external keying pulse Output
Ship's speed Distance signal Alarm signal Keying pulse 3 ports* (Digital) 1 port (Analog) 1 port* (400 pulses/nm) 6 ports with contact closure signal at 200 pulses/nm 1 port* 1 port 2 ports for IEC61162 data

Interconnection Diagram

Display unit DS-500

Input/Output

30 m max
* For those needing more ports, Distribution box DS-370 is optionally available

Remote box DS-501

ENVIRONMENT (IEC 60945 test method)
Temperature: -15C to +55C

POWER SUPPLY

115/230 VAC

IEC 1162 Distance signal

(200 pulses/nm)

2 ports

1 port
Alarm signal Distance indicator DS-730
Alarm signal Distance signal (400 pulses/nm) Digital signal (speed) Analog signal (speed)

**** **** ****

6 ports

Processor unit

1 port 2 ports
Keying pulse Keying pulse

DS-510

(Transceiver built in) 1 port

*** Distance signal

(400 pulses/nm)
212 8.3" (140 5.5") 47 1.9" 84 3.3" 220 8.7" 15 0.6"

Processor unit DS-510

670 26.4"

50 m max

Range switch box DS-389

100 m max

or DS-511

(Specify when ordering)

Distribution box DS-370 Digital indicator DS-350/351

DOPPLER SPEEDLOG DS-50

Analog indicator DS-381/382
678 26.7" 640 25.2" (410 16.1")

(258 10.2")

272 10.7"

300 11.8"

istance Keel Clearance

kt m/s ft fa nm

See below for connection between processor and transducer.

DIMMER

Connection between processor and transducer

38 1.5"

600 23.6" (630 24.8") 4- 12 4-5x16

10/15/20/ 30/100 m

Processor unit DS-511

Cutout for flush mount

Transducer DS-530 with tank DS-531
Gate valve DS-532 (option) 443 17.4"
Transducer DS-530 with Transducer tank DS-531

840 33.1"

Junction box CI-630

Junction box DS-360 *

400 m max

* Junction box DS-360 *

*TTYCY-16S **TTYCY-4S ***TTYCY-2S ****TTYCY-1S
718 28.3" 1000 39.2" 400 15.7"

Transceiver unit DS-520

25 1.0"

350 13.8"

Junction box CI-630 Transducer
150 5.9" 216.3 8.5"

Option Shipyard supply

(Specify either Transducer tank DS-531 or Gate valve DS-532 when ordering)

Transducer

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE 02045Y Printed in Japan

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