Hydrophones detecting enemies before radar does

Red Devil · 12-29-17, 07:49 PM

anyone who has watched tv like The Blue Planet will know sonar can carry for miles underwater. Dolphins, whales etc can hear 'conversations' hundreds of miles away. Water is the best conductor of sound - ever! Radar is limited by the horizon, at what? 12000 - 14000 yards away. If radar is mounted on the deck, thats the limit but if higher, on the tower mast, you may get another 2000 yards. A good trained asdic operator will pick out the turning of screws at a reasonably great distance. Depth, salinity and temperature were of vital importance in the effectiveness of the British ASDIC, first researched in WW1 by French, British and US scientists. It later became known by the USA word, Sonar. The worlds first vessel to receive ASDIC was HMS P59 in 1919.

http://jproc.ca/sari/asd_gen.html

Sonar v U Boats https://uboat.net/allies/technical/asdic.htm

12-29-17, 07:49 PM	#13
Red Devil The Old Man Join Date: May 2004 Location: Sutton Coldfield England Posts: 1,515 Downloads: 258 Uploads: 0	anyone who has watched tv like The Blue Planet will know sonar can carry for miles underwater. Dolphins, whales etc can hear 'conversations' hundreds of miles away. Water is the best conductor of sound - ever! Radar is limited by the horizon, at what? 12000 - 14000 yards away. If radar is mounted on the deck, thats the limit but if higher, on the tower mast, you may get another 2000 yards. A good trained asdic operator will pick out the turning of screws at a reasonably great distance. Depth, salinity and temperature were of vital importance in the effectiveness of the British ASDIC, first researched in WW1 by French, British and US scientists. It later became known by the USA word, Sonar. The worlds first vessel to receive ASDIC was HMS P59 in 1919. http://jproc.ca/sari/asd_gen.html Sonar v U Boats https://uboat.net/allies/technical/asdic.htm __________________ > > Captain!, there's a destroyer on the por........ periscope is flooded Sir! > Darkness is only the absence of Light; Ignorance is only the absence of knowledge © www.worldwartwo.uk www.captainwalker.uk