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- Q17140155 subject Q8227841.
- Q17140155 subject Q8294472.
- Q17140155 abstract "A towed pinger locator is a water-borne device used to locate the sonar "ping" from the underwater locator beacon which is fitted to the Cockpit Voice Recorders and Flight Data Recorders installed in commercial airliners. They can locate pingers at depths of up to 20,000 feet (6,100 m) underwater.The locator is mounted in a hydrodynamic shell, or "tow fish", connected by winch behind a surface vessel across the search area. The locator listens for the sound emanating from the beacon or "pinger". Once located, the beacon and its attached recorders can be retrieved by divers, submersibles or remotely operated vehicle (ROV), depending on depth. A model currently used by the United States Navy is the TPL-25, which has a weight of 70 pounds (32 kg) and a length of 30 inches (760 mm); it is generally towed at 1–5 knots (1.9–9.3 km/h).Most beacons transmit a pulse once a second at 37.5 kHz.The hydrophone must be positioned below the thermocline layer which reflects sounds, either back to the surface or back to the ocean floor. Since the pinger signal is relatively weak, the hydrophone must be within about one nautical mile (6,076 feet (1,852 m)) to detect it. The hydrophone is typically deployed about 1,000 feet (300 m) above the ocean floor, where it can scan a swath approximately 12,000 feet (3,700 m) wide, on a flat, level surface.".
- Q17140155 thumbnail Towed_pinger_locator.svg?width=300.
- Q17140155 wikiPageWikiLink Q11220.
- Q17140155 wikiPageWikiLink Q1419642.
- Q17140155 wikiPageWikiLink Q1570255.
- Q17140155 wikiPageWikiLink Q15908324.
- Q17140155 wikiPageWikiLink Q18180.
- Q17140155 wikiPageWikiLink Q185380.
- Q17140155 wikiPageWikiLink Q420122.
- Q17140155 wikiPageWikiLink Q659809.
- Q17140155 wikiPageWikiLink Q6644463.
- Q17140155 wikiPageWikiLink Q798062.
- Q17140155 wikiPageWikiLink Q8227841.
- Q17140155 wikiPageWikiLink Q8294472.
- Q17140155 wikiPageWikiLink Q849599.
- Q17140155 wikiPageWikiLink Q93318.
- Q17140155 wikiPageWikiLink Q998319.
- Q17140155 comment "A towed pinger locator is a water-borne device used to locate the sonar "ping" from the underwater locator beacon which is fitted to the Cockpit Voice Recorders and Flight Data Recorders installed in commercial airliners. They can locate pingers at depths of up to 20,000 feet (6,100 m) underwater.The locator is mounted in a hydrodynamic shell, or "tow fish", connected by winch behind a surface vessel across the search area.".
- Q17140155 label "Towed pinger locator".
- Q17140155 depiction Towed_pinger_locator.svg.