A few new ideas

Fidd · 06-05-24, 09:56 PM

156. Audible pings not necessarily being detections.

Asdic pings hitting a u-boat, (as heard from within) have been described as akin to "gravel hitting the hull". I take this to mean that rather than hearing a clear-ping and echo, as an asdic operator would hear, the sound was "muddled" and prolonged slightly. I would like to see a transition from this sound becoming increasingly clear and distinct the closer the asdic-equipped escort got to the u-boat. The point of this is to remove the certainty of precisely when a u-boat is detected on asdic. Instead, perhaps, if the hydrophone operator on the u-boat is listening to that escort, he will hear the acceleration and have a short interval to report this before splashes (7-20 seconds?). As the escort comes overhead, it's props should be audible within the u-boat, but, "splashes" would only be audible on the hydrophones.

These changes would mean the hydrophone use on the u-boat would become more important in terms of the timing of going full ahead to escape being hit by DC's, rather than it simply being a case of anyone on the boat hearing "pings on the hull" and therefore knowing when to take measures to escape a DC attack. As a another wrinkle, the ability to hear "splashes" on the hydrophone in the first place could be made conditional on the e-motor being set to silent running?

06-05-24, 09:56 PM	#1
Fidd XO Join Date: Apr 2005 Location: Blighty! Posts: 439 Downloads: 10 Uploads: 0	156. Audible pings not necessarily being detections. Asdic pings hitting a u-boat, (as heard from within) have been described as akin to "gravel hitting the hull". I take this to mean that rather than hearing a clear-ping and echo, as an asdic operator would hear, the sound was "muddled" and prolonged slightly. I would like to see a transition from this sound becoming increasingly clear and distinct the closer the asdic-equipped escort got to the u-boat. The point of this is to remove the certainty of precisely when a u-boat is detected on asdic. Instead, perhaps, if the hydrophone operator on the u-boat is listening to that escort, he will hear the acceleration and have a short interval to report this before splashes (7-20 seconds?). As the escort comes overhead, it's props should be audible within the u-boat, but, "splashes" would only be audible on the hydrophones. These changes would mean the hydrophone use on the u-boat would become more important in terms of the timing of going full ahead to escape being hit by DC's, rather than it simply being a case of anyone on the boat hearing "pings on the hull" and therefore knowing when to take measures to escape a DC attack. As a another wrinkle, the ability to hear "splashes" on the hydrophone in the first place could be made conditional on the e-motor being set to silent running?