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Re: What is H.E.?
Posted by: Ken Dunn ()
Date: November 19, 2010 08:17PM

Hi BHenderson,

HE stands for Hydrophone Effect. Asdic sends out a pulse then the receiver listens for it after it bounces off its target. In HE mode the Asdic simply listens and acts as a hydrophone would. No pulse is sent out. HE is also referred to as “passive mode” etc. The noise created by a torpedo’s propellers was often picked up via HE alone.

Regards,

Ken Dunn

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Subject Written By Posted
What is H.E.? BHenderson 11/19/2010 08:08PM
Re: What is H.E.? Ken Dunn 11/19/2010 08:17PM
Re: What is H.E.? BHenderson 11/20/2010 12:17AM


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