>On an island you can call for a boat or a helicopter. Boat, yes; helicopter, no, unless the island is pretty close to civilization. Helicopters have very lim

>On an island you can call for a boat or a helicopter. Boat, yes; helicopter, no, unless the island is pretty close to civilization. Helicopters have very limited range. No helicopter is going to rescue you from some remote island in the south Pacific, unless it was launched from a rescue ship (in which case it was really the ship that rescued you; the helicopter was merely more convenient for transportation between the ship and the island than a tender boat).