Paul Allen also was very interested in undersea exploration. His yacht Octopus (415 feet) and his research vessel Petrel (250 feet). He recovered the ships bell from HMS Hood for the RN and it was placed at a memorial to HMS Hood by the Princess Royal.
He discovered the wrecks of USS Indianapolis, USS Lexington, USS Juneau, USS Helena, HMAS AE1 and RMI Artiglieri.
He has spoken about certain asian countries looting what amount to war graves for their scrap metal content.
Admiral Richardson USN, the Chief of Naval Operations has commented on the navy's gratitude for his work. Paul Allen USNI article