Next message: Ken James: "Re: lv-ab: "Prper Watch""
The boat I served on in the late 50's (U-Boot Jaeger) had a retractable
rotating sonar dome
that could be lowered below keel level and used for both active sonar or
passive listening.
Walter
----- Original Message -----
From: "Arild Jensen" <>
To: "Philip" <>; <>
Sent: Thursday, June 01, 2006 11:06 AM
Subject: RE: lv-ab: "Prper Watch"
>
> -----Original Message-----
> From: Philip
>
>
> As far as watch keeping aids are concerned I would think that a passive
> sonar unit would be just the ticket. Sound travels faster and further
> underwater than in the air and a ship of fishing vessle would be audible
> for
> some distance.
>
> Any one hear of such a thing for small boats?
>
>
> REPLY
> Well we did use them for the "small warships" called corvettes during
> the last war. We called them ASDIC
> Essentiually it was a directional hydrophone which cluld be rotated by
> a
> steering wheel from the control station.
> <VBG>
> Arild
>
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