THE SHIP RESPONSE TACTICAL DECISION AID, PHASE 1

The Ship Response Tactical Decision Aid (SRTDA) is a seakeeping tool that will provide Battle Group Commanders and Commanding Officers advisories on ship speeds and headings to optimize operations and minimize casualties during the conduct of evolutions that become hazardous in heavy seas. The SRTDA is under development in two phases. One validation trial has been performed. Ship motions were measured and compared to values predicted by the SRTDA that varied with the source of wave data. Predicted motions were made with visual observations, wave buoy measurements and SPS-10 radar measurements. The SPS-10 did not have the capability to provide wave height, therefore the buoy-measured wave height was used in the radar wave measurement. Buoy and radar measured wave inputs to the SRTDA consistently provided motion predictions that were in better agreement with measured motions than the observed wave data. Motion predictions based on observations were consistently less than the real time motion measurements. The mean difference between measured and predicted motion was generally less than +or- 20% for the buoy and the radar measured wave inputs. A more sophisticated SRTDA is currently being developed in Phase II. This incorporates input of a directional spectrum of waves based on measurements by a ship's SPS-64 radar. A level of operability of the ship's system is displayed for a range of headings and speeds, given the sea conditions.

• Supplemental Notes:
  • Report
• Corporate Authors:

  David Taylor Naval Ship R&D Center

  Bethesda, MD  United States  20084

  Naval Ocean Systems Center

  San Diego, CA  United States 
• Authors:
  • Bachman, R J
  • Thomas III, W L
• Publication Date: 1989-11

Media Info

• Features: References;
• Pagination: 57 p.

Subject/Index Terms

• TRT Terms: Computer programs; Decision support systems; Forecasting; Seakeeping; Ship motion; Simulation; Wave measurement
• Old TRIS Terms: Heavy weather; Ship response; Srtda (Ship response tactical decision aid)
• Subject Areas: Data and Information Technology; Marine Transportation; Planning and Forecasting;

Filing Info

• Accession Number: 00660429
• Record Type: Publication
• Source Agency: Maritime Technical Information Facility
• Report/Paper Numbers: DTRC/SHD-1220-02
• Files: TRIS
• Created Date: Jul 21 1994 12:00AM