White Death by Clive Cussler, Paul Kemprecos

When a confrontation between a radical enivironmental group and a Danish cruiser off the Faroe Islands sinks a ship, trapping her crew beneath the waves, Kurt Austin of NUMA is immediately called to the rescue. Investigating the collision, Austin uncovers a trail of sabotage that leads to a sinister multinational corporation seeking control of the waves. When he is almost killed for his trouble, Austin knows that this is one organization that will let nothing stand in its way. But with an environmental disaster underway, the clock is ticking for Austin and the NUMA team ...