Factual error: As the students disembark from their DC-3 at the airport a Britten-Norman Islander is seen in the background, an aircraft type that did not enter production until five years later. A little later what is clearly a post-1970 Land Rover is visible.
When the students are below deck having a meal, a glass pitcher of orange juice can be seen. Even though the boat is apparently rocking to and fro in the waves, the juice level stays still. Obviously it is the camera that is moving and not the set.