2020 T-AGS Industry Day (2).pdf

Question Answer

1 What is the Navy's plan for the shipboard C5ISR suite?

The T-AGS Next is not planning on a full up C5ISR (Command, Control, Communication, Computers, Conbat Systems, Intelligence, Surveilance ande reconnaissance) system. The T-AGS is an oceanographic survey ship with no current combat profile. The data communication system is currently a Government System consisting of a commercial C-Band System.

2 Has the Navy identified any special C2 requirements?

While there is no plan for the vessel to have combat elements, with respect to present and future communications the Navy desires increased capability including a smaller physical footprint than legacy system, affordablity, world wide accesibility to existing constelatiions, reliable and secure communications and datalinks that meet Dod cybersecurity requirements, with faster upload and download speeds.

3 Who does the Navy anticipate as the platform system integrator? The Navy or industry? The integrator could be Navy and/or Industry.

1 What are some of the challenges referenced that you are having with current sonar technologies?

The current sonar technological challenges include the following:

a. bubble sweep-down

b. acoustic interference from ship propulsion and other ship systems

c. Electromagnetic interference with propulsion drives

d. potential noise sources arrising from array fouling, thruster misalignment, gondola surface damage

e. Properly measuring the sound velocity as a volume (with the wide swaths of the current sonars), especially in areas where these measurements are changing rapidly (especially near shore)

f. Interference between the mission sonars (NAVO sonars) and the ship navigation sonars

g. the volume of data the new sensors provide. It is no longer just depth soundings, but they now provide backscatter and water-column data that produces very large files and is a challenge to process. The tools to process the data are relatively new and are being improved/updated at a slower pace than needed to keep up with the technology. The challenge is not only the tools to process the data, but the tools to create a product.

h. Calibrated backscatter requires a different kind of field calibration than NAVO has experience with or is equipped to perform. There are potential other uses for this data to be exploited that will create additional unknown challenges.

2 What sensors are you using for your UUVs?

The following sensors are currently used for the Government's UUVs:

Multibeam 300Khz Sidescan 850khz/230khz Doppler Velocity Log 600khz Multibeam 200kHz-400kHz High Resolution Interferomatic Synthetic Aperature Sonar 230khz – 280khz

3 What is the frequency range of the acoustical sensors used?

SBP: 2-9 KHz Multibeam Sonars: 11-13KHz; 40-100KHz; 200-400KHz ADCPs: 38KHz; 300KHz, adding a 150KHz Split Beam Sonars: 38KHz, 200KHz, potentially adding a 18KHz Acoustic Positioning: 21-31KHz, 9-15KHz

Is the vessel to be built to ABS Steel Vessel Rules (SVR) or ABS Naval Vessel Rules (NVR) requirements? (With which Notations ACU, ACCU, etc.?).

The vessel will be built to the New ABS Marine Vessel Rules (The former Steel Vessel Rules

2 Is the Vessel to be built to SOLAS requirements? The vessel is built to meet SOLAS requirements and only get a Statement of Fact from ABS

3 Is the Vessel to be built to 46CFR requirements? Yes. It most likely will be accomplished through the Alternate Compliance Program but could be a

NVIC 10-82.

4 Is the Vessel to be built to 33CFR requirements? Yes

5 Is the Vessel to be built to 40CFR requirements, e.g.

US EPA Tier 4, IMO Tier III? USA EPA Tier 4 requirements

1 What is vessel's operational profile, ie fast transit, slow transit, DP, tracking, loitering etc?

The ship shall be capable of 12,000 nm at 12 knots plus 29 days at 3 knots. A 10 percent fuel reserve shall be provided based on the fuel required. b. Sustained speed shall be the speed achieved at 80 percent of maximum continuous shaft horsepower at full load displacement. c. The ship shall be capable of towing scientific packages with up to 10,000 pounds horizontal pull at five knots and 20,000 pounds horizontal pull at 2.5 knots. d. See additional worksheet (Dynamic Positioning requirements

N/A Thrustmaster expressed its interest in the Machinery/Propulsion slides and believes it has potential solutions to the propulsion challenges

TBD

N/A Altramotion submitted a capabilities document outlining its couplings, clutches and brakes N/A

2 What are specific issues with the current TAGS propulsion system?

1. The AC Propulsion drives are creating some electromagnetic interference with the mission systems

2. The slewing gear requires replacement/repair every few years.

3 How many vessels expected in class? Up to 7 vessels are expected in class.

Current TAGS are fitted with thruster designs from the 1980's with pushing propellers in nozzles, is USN open to modern thruster designs such as with pulling propellers which are quieter and more

Yes

5 Class notations? Ice Class?

The ship, all piping, materials and workmanship shall be designed and built in accordance with 20XX ABS Marine Vessel Rules, A1 circle E AMS and ACCU. ABS shall review and inspect in accordance with the Alternate Compliance Program (ACP) for USCG (NVIC 2-95). Ice strengthening shall be in accordance with, but not certified to, Ice Class D. The ship shall be issued a USCG certificate of inspection (COI) and shall be built in compliance with and certified by USCG in accordance with the Code of Federal Regulations, Title 46, Subchapter U and comply with all applicable Federal Regulations as modified by the applicable US Supplement to ABS Rule for Offshore Support Vessels for Vessels Certificated for International Voyages, dated August 1, 2017.

The ship shall be equipped to satisfy the Panama Canal Transit Regulations.

The Contractor shall obtain and provide a Suez Canal Special Tonnage Certificate, United States Certificate of Admeasurement, Deratting Exemption, Certificate of Sanitary Construction and a Panama Canal Tonnage Certificate for the ship. The ship shall meet SOLAS requirements, but a certificate is not required. The Contractor shall have ABS issue Statements of Voluntary Compliance for SOLAS required systems and equipment.

GMDSS requirements shall be met for AREA 3 compliance.

Sea chest covers, excluding mission sea chests, shall be hinged. Weld bead markings shall be provided on the underwater shell at watertight and oiltight bulkheads and to indicate locations of tanks. The “ABS Guide for Underwater Inspection in Lieu of Dry Docking Survey” shall be used for guidance. The Contractor will not provide a UWILD certificate. Weld bead markings shall not conflict with the requirements for sonar self noise.

An Energy Efficiency Design Index (EEDI) shall not be developed.

“Code of Safety for Special Purpose Ships” shall not be applied.

EPA Tier 4 engines for the ship service generators.

6 Noise Specification? ICES209? DNV Silent Ship?

etc? Please refer to the attached "Noise Requirements Tab"

7 MILSPECS? SHOCK? No

8 Vessel Speed, Bollard Pull, Towing Force expectations? There are no Towing Force expectations.

9 Anticipated power available for main propulsion? 8,000-20,000 horspower (Depending on hull)

The attached powerpoint, presented publically last year, summarizes the ongoing research Glosten has undertaken on quantifying bubble sweepdown to improve our R/V hull designs, what's the process whereby Glosten and Navsea can team to further

One method is to allow the Navy to instrument one of your R/V hull designs, which have incorporated the bubble sweep down improvements to analyze the final results. Another method is to incorporate key parameters to be anlayzed and include in an Industry Study.

2 Does Navsea have a bubble sweep-down performance target?

The bubble sweep down requirement is still being analyzed. The current requirement is no bubble sweep down degradation to acoustic sensors at speeds @ 12 knots and below as a threshhold and up to 20 knots for an objective requirement.

How will bubble sweepdown performance be weighted as a parameter in the selection of the T- AGS(X) hull design? Bubble Sweep down will be one of the top priorities.

Will there be financial ramifications to not meeting bubble sweepdown specifications in the final design?

The bubble sweep down requirement will be a requirement for delivery and could result in potential contract default.

5 What is the timeframe for establishing bubble sweepdown performance criteria?

Bubble Sweep down timing is after the Oceanographer has identified their operational capabilities, which will be before solicitation of the Material Solution.

6 What is meant by an end-end hullform design?

It refers to identifying all the pertinent performance requirements (Such as bubble sweep down, sea-keeping, endurance requirements, speed requirements) and developing a hull design to meet and/or optimize all the required capabilities.

7 How does Navsea measure bubble-sweepdown performance now?

Bubble Swep Down is currently measured indirectly by monitoring sonar performance. Permanent test hydrophones and some temporary hydrophones are installed throughout the vessel in close proximity to the acoustic sensors undere observation. Additionally, an acoustic trial is performed and the acousticians are able to identify noise sources such as bubble sweep down, propeller cavitation, electromagnetic interference, and machinery contribution. For the next class of vessels the Navy is interested in industry developing modeling and simulations techniques enabling direct mesurements of bubble sweepdown to establish baseline thresholds.

2020 Industry Brief Questions