On Isla Nublar, InGen utilized a Sikorsky Helicopter for use to transport workmen on and off the island as it was still in the construction phase. After an injured workmen was fatally mauled by a Velociraptor, one of these Helicopters was used to transport the workman to Bahía Anasco for treatment. It is known that there were at least five individuals on board this particular helicopter. These were the Two crewman, the pilot, the injured workman, and Ed Regis. After Dr. Roberta Carter failed to save the workman, the crew left the village with the corpse in tow.
Jurassic Park by Michael Crichton page 2,5-6(First Edition, Thirty Fourth printing)