One tentative recollection credits SOE with using condoms to waterproof the fuze of an underwater demolition charge or mine. Operation Royal Marine's planned Rhine mines supply the associated example. Campbeltown's demolition charges prompt another recollection of a chemically calibrated metal-in-acid fuze. The time required for acid to dissolve the enclosed metal would determine the delay before firing. Both examples illustrate small practical mechanisms, while their attribution and technical details remain recollections.
Notable Point · 4:19:58-4:21:14
SOE waterproofing and chemical delay fuzes
Small waterproofing and delay mechanisms illustrate the practical engineering behind demolition operations.