US Research Vessel Programs
OCEAN AGOR General Purpose Research Vessel Program

ERVO 2009

US RV Programs

Current Programs

Ocean Class AGOR General Purpose RV Regional Class Research Vessel (RCRV) Alaska Region Research Vessel T-AGS 66 T-AGS 60 Class Sonar Upgrades

Ocean Class AGOR

Class of 2 Mid Size, General Purpose, Monohull Research Vessels Funded by US Navy; Operated by UNOLS Academic Institutions Concept Design, Requirements Development Performed During 2008/2009 Solicitation Released in April 2009 for Two Industry Design Teams Industry Design Competition During 2010 Start of Construction for First Ship Expected in 2011 Delivery in 2014
OCEAN Class SMR Highlights
Accommodations: 20 Scientists, 21 Crew (USCG inspected vessel) Range: 10,000 NM at optimal cruising speed (10 Kt) Speed: 11 knots in calm seas, at 80 percent MCR Seakeeping: OI of 1.0 in SS4, 0.8 in SS5, and 0.5 in SS6 Science load: 150 Tons Sonars: EM122, EM710, SBP120, EA600, ADCP, HiPAP Handling Systems: Stern frame, side frame, motion comp CTD Dynamic Positioning: Trackline and station SS5, 35 Kt wind and 2 Kt current Design: ABS Classed, USCG inspected, SOLAS compliant Laboratories: 2,000 Sq Ft Working Deck: 2,100 Sq Ft Vans: Carry 2 standard 20 Ft ISO vans
OCEAN Class Sonar Systems
EM x 2 Deg Multibeam EM 710 0.5 x 1 Deg Multibeam EA-600 Single Beam Echosounders- 12, 30 120, KHz HiPAP 500 - Acoustic Positioning System SBP x 6 Subbottom Profiler ADCP 38, 150, 300 KHz
Wind Speed/ Direction System
NAVSTAR GPS I-MET Sensors
Launching, Towing, and Recovery of ROVs and AUVs
CTD Acoustic Positioning System Doppler Speed Log Depth Finding System Shallow Water Multibeam Echo Sounder
Acoustic Doppler Acoustic Current Profiler Position
Hydrographic Echo Sounder Deep Water Multibeam Echo Sounder
Picture courtesy of Lockheed Martin
OCEAN Class AGOR Acquisition Process
3 Phase Acquisition Process: Pre-phase I Notional Design, Trade Studies, Specification, and RFP Development Phase I Industry Team Competitive Designs Phase II Downselect To One Shipyard for Detail Design and Construction Phase III Post Delivery Acoustic System Installation
Phase I Industry Competitive Designs
Solicitation Released April 24th, 2009 Proposals Due June 24th, 2009 Award Expected September 2009 Period Of Performance is One Year
URL for Solicitation and Ship Specification is:
https://www.fbo.gov/spg/DON/NAVSEA/NAVSEAHQ/N0002409R2 212/listing.html

OCEAN Class Schedule

ON D J F MA M J J A S O N D J F MA M J J A S O N D J F MA M J J A S O N D J F MA M J J A S O N D J F MA M J J A S O N D J F MA M J J A S O N D J F MA M J J A S O N D J F MA M J J A S O N D J F MA M J J A S
ACAT Designation Government Notional Design CDD Review (96 Days) CDD Signature ASR Approved RFP Release (combined phase I& II) Phase I Bid Preparation Phase I Source Selection Phase I Award (Preliminary/Contract Design) Preliminary/Contract Design Phase II Bid Preparation Phase II Source Selection Milestone B/C Phase II Award (Detail Design & Lead Ship Construction) Detail Design SOC Follow Ship Award SOC Delivery FOC Delivery IOC

Key: Planned Event Completed Event Duration TBD ACAT: Acquisition Category ASR: Acquisition Strategy Report CDD: Capability Development Document FOC: Full Operational Capability IOC: Initial Operational Capability RFP: Request for Proposal SOC: Start of Construction
US RV Programs Notional Designs Developed
Threshold and Objective Requirements Defined
OCEAN Class Efforts in 2008
To Validate Achievability and Affordability of Requirements Develop Cost Estimates for Planning and Budget Purposes Identify Potential Design Risk Areas
Trade-off Analyses Performed in Key Areas to Assess Systems/Features with Respect to Performance and Cost
Bubble Sweepdown CFD Analysis Sonar Mounting Arrangement Multibeam Sonar Performance Propulsor Configuration Propeller Parametric Study Dynamic Positioning Capabilities Over-the-side Handling Systems (CTD) Radiated Noise Improved Reliability/Maintainability Corrosion Protection
Ocean AGOR Sonar Study Efforts
Investigate Different Mounting Configurations For Scientific Sonars Investigate Impact On Vessel Design, Port Access And Acquisition Cost Investigate Impact On Sonar Performance Including Sonar Self Noise And Bubble Sweepdown.
Gondola T-AGS 60 Cow Catcher R/V Thompson
Keel Fairing R/V Melville
Flush Mount R/V Kilo Moana

Bubble Sweepdown

Bubbles generated by:
Natural wind and wave interactions Ship induced turbulent flow at water surface (bow wake)
Transported by hydrodynamic flow lines around and under hull form Two degradation effects:
Local noise generated by bubbles Bubbles act as acoustic baffle
Results in lost signal return Effects generally worse in higher sea states and higher speeds
Approaches to Reduce Bubble Sweepdown
Install Bubble Diverting Fences Install A Gondola Install Sonar Fairings To Divert Bubbles Away From Sonar Transducers Locate Sonars Forward Of Bubble Flow Streamlines Operational Changes
Reduce Ship Speed Ballast To Deeper Draft And/Or Trim By Bow Modify Survey Headings To Reduce Pitching

Bow Shape Design

Avoid Bulbous Bows Design Bow Shape To Direct Bubble Flow Streamlines Up And Aft
Potential Ocean AGOR Sonar Configurations

Keel Fairing

Cow Catcher Fairing
Gondola Modified Bow Shape
Stream Trace Released 0.5M Below DWL At The Bow

Y X Z X Y

Sonar Performance Studies
CP 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 -0.1 -0.2
AGOR Stream Trace On The Original Hull

Ship Draft Of 16.3 Feet

Computations Using SWIFT Profile View
AGOR Stream Trace On The Mod 3 Hull
Plan Views of Forebody Variants
Sonar Mounting Evaluation
Mounting Option Flush - baseline hull Flush - bulbous forebody "Cow Catcher" Fairing Keel Fairing Flow Fences Gondola

Impact on Fuel Consumption Almost zero Minimal - 1 to 4% Low - <5% Lower - very small projected area Highest - 20 % added resistance High - 16 % (8m array); 12% (4m array)
Sonar Performance Poor - baseline hull Good - bulbous forebody (4m Rx array)
Impact on Navigational Draft None None
Good - proven on AGOR 23/24 (4m Rx Moderate - adds 0.6 array) meter Fair - depth may be insufficient to avoid Minimal to None most bubbles Good - alignment important, cavitation risk, good remedial fix Excellent - lowest risk option on many ships None High - adds 1-2 meters
Specification Requirements Related to Bubble Sweepdown
Require computational fluid dynamic (CFD) analysis Specify minimum distance between bow area flow streamlines and sonar locations. Consider streamline origination points below DWL to account for pitch motion Model scale flow visualization testing using water soluble dye has been found more effective than paint tests in predicting bubble paths and is also required.

Radiated Noise Study

200 190

dB//1uPA@1 meter

1000 Frequency (Hz) Whale Call High Source Lvl High Spd Cruise MAX Recreational Diver Proposed Requirement Whale Call Low Source Lvl High Spd Cruise MIN ICES Lvl B Explosive Harrasment SS3 + Shipping III @ 4KYDS OSCAR DYSON - 15 Kts 10000 100000
Full Compliance with ICES 209 is Very Expensive Not Required for General Purpose Vessel Some Reduced Level of Performance Still Desired Developed Standard More Appropriate to General Purpose Mission
Ship Noise will be lost in a State 3 Sea / Shipping Density III at 4000 yards
Regional Class Research Vessel
Class of Up to 3 Small, Regional, General Purpose Research Vessels Approximately 40 Meters Long, Monohull To be Operated by UNOLS Academic Institutions Two Contracts Awarded May 2006 for Competitive Preliminary/Contract Design Period Phase I Designs Completed late 2008 NSF funding shortfall Design review to be held in August 2009 Construction Planned to Start 2010 or 2011
Alaska Region Research Vessel (ARRV)
Final Design Review Completed October 2008 $123M Total Budget Z Drives To Be Provided Owner Furnished Investigating 3.7m Hull Lengthening to Accommodate Anti-Roll Tank Funding in Economic Stimulus Bill RFP Released March 2009 Award Expected October 2009 Delivery in 3 Years +/Table of Characteristics
Overall length: Draft: Beam: Speed: Endurance: Icebreaking: Scientist berths: Crew berths: Science labs: Deck working area: 236 feet 18 feet 52 feet 14.2 knots 45 days 2.5 feet at 2 knots 26 17-square feet 3,690 square feet
http://www.sfos.uaf.edu/arrv/

109 Meter, Multi-Purpose, Survey Ship

T-AGS 66 Survey Ship

Owned by US Naval Oceanographic Office; Supports US Naval Fleet Sole Source Procurement from Original Builder of T-AGS 60 Class Modified Repeat of T-AGS 60 Class
9 Meter Increase in Length Moonpool for AUV Operations Additional Staterooms Convert DC to AC Propulsion
RFP Released in April 2009 Award Expected in September 2009 Delivery in 2013
Class of Six - 100 Meter Survey Ships One Upgraded Per Year Third Ship Completed in June 2009 Flush Mounted Systems Replaced with Gondola
T-AGS 60 Class Sonar Upgrades
Equipment Kongsberg EM122 Deep Multibeam Kongsberg EM710 Midwater Multibeam Kongsberg EA-600 Single Beam Kongsberg SBP120 Subbottom Profiler RDI Acoustic Doppler Current Profiler Acoustic Navigation System Frequency 12 kHz 70-100 kHz 12, 38, 120, and 200 kHz 2 kHz 8 kHz 15 kHz 20 kHz 38 kHz, 75 kHz, 150 kHz 20 kHz 30 kHz
Skeg Extension with Winglets

Thank You