原来海军对付潜艇用的声呐要经过改装才能接受黑匣子的水 ...

刚知道原来海军对付潜艇用的声呐设备要经过改装才能接受黑匣子的水下信号，这就能解释为何土鳖派出去的有些舰艇并没有启用船上的反潜声呐设备。

据国际媒体报道，澳大利亚的P-3巡逻机在昨天再次发现疑似MH370飞机黑匣子的水下信号。澳大利亚这次派去的4架P-3巡逻机每架飞机能释放84只声呐浮标。P-3平时主要是执行反潜的任务，其声呐系统是针对潜艇而设计的。而飞机黑匣子发出的是人耳听不到的37.5kHz超声波。所以为了执行这次任务，澳大利亚军队的这四架P-3上的声呐处理设备都经过了临时的改装，以便适合接受者黑匣子的声呐频率。澳大利亚军方说，这些改装属于临时的试验性质。

http://edition.cnn.com/2014/04/1 ... ndex.html?hpt=hp_t1

Possible signal raises hope

The possible signal heard by a search plane was picked up through sonar buoys equipped to receive such electronic data and was detected near the Australian ship Ocean Shield, said the Joint Agency Coordination Centre.

The Australian Defense Force source said the signal detected was not at the 37.5 kHz frequency consistent with the pingers from flight data recorders but in a range that suggests strongly that it is from something that is man-made. Commodore Peter Leavy of the Royal Australian Navy said Wednesday in Perth that existing technology in RAAF P3 aircraft had been modified to allow the acoustic processor to pick up sounds in the frequency range. Using the technology in this way is experimental, according to the source.

The source said four RAAF P3 Orions have been modified with this technology, with the sonar buoys expiring and sinking about eight hours after they are deployed from the aircraft. On Wednesday, Leavy said that each P3 is capable of deploying 84 buoys, laid in a pattern or grid coordinated with the Ocean Shield.

Although Leavy said the buoys have sensors that can detect signals "at least" 1,000 feet below the surface, the source is confident that the technology has been tested at a "much deeper depth."

Crews have been narrowing the search area in the Indian Ocean.

刚知道原来海军对付潜艇用的声呐设备要经过改装才能接受黑匣子的水下信号，这就能解释为何土鳖派出去的有些舰艇并没有启用船上的反潜声呐设备。

据国际媒体报道，澳大利亚的P-3巡逻机在昨天再次发现疑似MH370飞机黑匣子的水下信号。澳大利亚这次派去的4架P-3巡逻机每架飞机能释放84只声呐浮标。P-3平时主要是执行反潜的任务，其声呐系统是针对潜艇而设计的。而飞机黑匣子发出的是人耳听不到的37.5kHz超声波。所以为了执行这次任务，澳大利亚军队的这四架P-3上的声呐处理设备都经过了临时的改装，以便适合接受者黑匣子的声呐频率。澳大利亚军方说，这些改装属于临时的试验性质。

http://edition.cnn.com/2014/04/1 ... ndex.html?hpt=hp_t1

Possible signal raises hope

The possible signal heard by a search plane was picked up through sonar buoys equipped to receive such electronic data and was detected near the Australian ship Ocean Shield, said the Joint Agency Coordination Centre.

The Australian Defense Force source said the signal detected was not at the 37.5 kHz frequency consistent with the pingers from flight data recorders but in a range that suggests strongly that it is from something that is man-made. Commodore Peter Leavy of the Royal Australian Navy said Wednesday in Perth that existing technology in RAAF P3 aircraft had been modified to allow the acoustic processor to pick up sounds in the frequency range. Using the technology in this way is experimental, according to the source.

The source said four RAAF P3 Orions have been modified with this technology, with the sonar buoys expiring and sinking about eight hours after they are deployed from the aircraft. On Wednesday, Leavy said that each P3 is capable of deploying 84 buoys, laid in a pattern or grid coordinated with the Ocean Shield.

Although Leavy said the buoys have sensors that can detect signals "at least" 1,000 feet below the surface, the source is confident that the technology has been tested at a "much deeper depth."

Crews have been narrowing the search area in the Indian Ocean.