Then , having dived in many of the wrecks involved , he wrote about the battle against the U-boats along the American east coast during World War II .
His first writings were magazine stories about scuba diving and his time as a scuba instructor .
Having dived in many of the wrecks involved , he wrote about the battle against the U-boats along the American east coast during World War II .
His first writings were magazine stories about scuba diving and his time as a scuba instructor .