The Boeing Vertol CH-46 Sea Knight was a large dual rotor transport helicopter manufactured by Boeing. It was one of several helicopters utilized by Biosyn during their attempt to seize control of Isla Nublar and take all of its assets for themselves. After defeating the Tyrannosaurus rex, Alan Grant and Michael Wolfskin were evacuated from the island in an InGen Agusta A-109A, only for the Sea Knight to come up alongside them, with Biosyn troopers leaning out and shoot at them. They were forced to shoot down the enemy chopper in order to escape.
The Sea Knight is the game's final boss on hard mode. It is fought after the player kills the Tyrannosaurus.