DARPA: POS Overview System Video

Job #4344

Job Posting Details

Job # 4344 DARPA: POS Overview System Video

Posted Date
Jul 29, 2007 @ 17:45
Respond By
Jul 31, 2007
Word Count
English (North American)
Age Range

Job Description

Informational system overview. Full script is included.
Thank you!


1. The DARPA Persistent Ocean Surveillance Station Keeping program is developing concepts for small tactical-sized buoys that are autonomous and self-sustaining, deriving their power from the environment, and capable of maintaining position at commanded GPS locations.

2. Robust enough to withstand Sea State 5 conditions, these buoys will operate unattended for weeks or months in the open sea.

3. Systems and technologies for persistent surveillance can transform and enhance current naval operations such as anti-submarine warfare, intelligence gathering, environmental monitoring and communications.

4. Today, small ocean buoys are rapidly deployed from aircraft to provide wide sensor coverage in areas of interest. Buoys can host a range of payloads for mission support including acoustic sensors, environmental sensors, EO sensors, or communications relays, to name a few.

5. A significant problem in remote maritime environments is the inadequate on-board power storage that limits a buoy’s useful life.

6. Another common problem is field integrity degradation. Currents and winds can quickly redistribute sonobuoys randomly with the flow of the ocean... sometimes by several kilometers after just a few hours.

7. The Persistent Ocean Surveillance Station Keeping program is addressing these challenges.

8. Now in the second year of development, the buoy concepts have had early test successes off the coast of Key West, Florida. The buoys did not stray beyond a 250 meter circle for 24 hours of continuous station keeping in real world ocean conditions. During the test, the buoys faced tidal currents as high as 1-1/2 knots, winds up to 20 knots and waves up to four feet.

9. One concept, modeled after a sailboat, was designed to stay on station using both an electric thruster and, when conditions permitted, a low power sailing mode. The buoy was able to conserve power by sailing 91% of the time during the Key West test. It autonomously performed more than 200 tacking and jibing maneuvers to stay on station.

10. Weighing less than 50 pounds, a second buoy concept was able to maintain station within a 50 meter circle. It utilizes a small thruster to consistently remain on station, has a rigid sail to harness wind, and a subsurface unit to harvest wave energy. This buoy has been uniquely designed for efficient packaging and aircraft deployment, an important consideration for future military use.

11. A third concept, called the “Flying Fish”, drifts to conserve energy and, upon moving beyond the watch circle, flies to re-position itself. By flying, this buoy minimizes energy usage during transit – eliminating the power sapping effects of in-water drag and taking advantage of the reduced drag in air.

12. In the next phase of testing, the buoys will be deployed in Monterey Bay where they are likely to experience currents up to 1kt, wind speeds from 10 to 25 knots, waves 6 to 9 feet, and varying solar conditions due to the marine layer fog. The buoys will be autonomous for seven days of testing, managing their station-keeping strategy and energy expenditure simultaneously.

13. DARPA’s Persistent Ocean Surveillance Station Keeping Buoys – transforming maritime surveillance, enabling new applications, and expanding the role of maritime sensor systems, on location wherever and whenever needed.

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