Panama — John Boyd

Denver Noles and his team decide to search for the Spanish treasures from map won by his deceased uncle during a World War II poker game. While searching the seabed off the coast of Panama an explosion rocks the Panama Canal.
A huge cargo ship inside one of the canal locks system is pushed out from the canal during the explosion.
Two men tumble into the water from their ship while Denver and his crew are nearby searching for Spanish gold. They pull the men from the water surprised they are U.S. Military and further surprised by learning what cargo is on the ship.
Noles and the others try to look for more survivors as the ship sinks, from sabotage and find more than they bargain for.
The hunt for gold is delayed as they have to hunt for the missing cargo and fight for their survival from a most deadly enemy.
A fight that even their SEAL training might not have prepared them for.