In Odessa Sea by Clive Cussler, Dirk Pitt and the NUMA go diving in the Odessa Sea. Their goal? Lost treasures of the Romanov dynasty and a lost bomber from the cold war that carried a deadly cargo. Modern day smugglers will try to beat them to the spot.
Quotable"No place is as totally democratic as the town library. The only entrance requirement is interest." - Lady Bird Johnson