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PT Boat Forum
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Jeff D
The PT Boat Forum
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PT Boats of WWII
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PT Boats - General
Post a reply to: Weighted Pouch
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[StartQuote] Oh yeah Frank, one more thing, I am certain that the IFF Transponder called the BK (or ABK) had a destructor switch that caused two small explosives charges to blow up and destroy the vacuum tubes etc inside the ABK unit. These two charges were not very large, perhaps the size of a golf scorecard pencil, so they wer not powerful enough to scuttle the entire boat, but only to ensure complete destruction of the interior components of the ABK. The ABK unit itself was roughly the size of 1 cubic foot. On the Higgins PT625 class, I have seen blueprints of the Radar System which specifies this "destructor circuit" I think you can find it on the Loisiana Digital Library Higgins Industries Collection. I am pretty certain the 80 foot Elcos would have used an almost identical setup as what they had on the Higgins boats. The IFF units were common to both ships and boats and aircraft and subs. In fact i found a photo of an actual ABK Unit located on the USS Pampanito (WW2 sub museum in San Fran) website. I hope this info is helpful. Jerry Jerry Gilmartin[EndQuote]
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