Your mission is to locate the sunken submarine in the area of its last known location. The surface ship is standing by to begin recovery efforts. 

Avoid sharks, seismic activity, and thermal vents as you conduct your search. 

The sea is not your friend. Monitor your air gauge and spear count to increase survivability and mission success. Items have been deployed around the wreck site. 

The cause of the disappearance is as yet unknown....