Don Prince Wrote:
-------------------------------------------------------
> NAVAL ORDNANCE AND GUNNERY
> VOLUME 1, NAVAL ORDNANCE
>
> CHAPTER 14
> ANTISUBMARINE WEAPONS
>
> [www.eugeneleeslover.com]
> .html
>
> It is extremely difficult to obtain a direct hit
> with depth charges, because the exact position of
> the submarine usually is not known. Consequently,
> depth charges depend on the percussive wave of the
> explosion for their effectiveness.
>
> The effective radius of the percussive wave
> depends upon the structural strength of the
> attacked vessel, and no definite values can be
> stated. Approximate information indicates that a
> 600-pound charge may cause moderate damage at 80
> feet, but to be fatal it must explode within about
> 30 feet. The 300-pound charge may prove fatal
> within 20 feet. It is to be noted that doubling
> the weight of charge does not double the effective
> radius.
>
>
> Hello Karloin,
>
> The above information indicates that the greater
> the U-Boat depth, then the less effective the
> expansion wave from the depth charge explosion
> because of the external pressure at depth. I do
> remember reading somewhere that U-Boat commanders
> were aware of this limitation. But, I can't seem
> to find the direct info...
>
> Regards,
> Don_



Don, I am not quite following you here. I don't think the information you quoted supports your hypothesis that depth charges are less effective at greater depths.

The information you posted deals with the distance between the Submarine and the Depth Charge. Not the depth of the submarine.

Am I misunderstanding what you posted?