Wow, once you look through the nostalgia, that episode was horribly made. The diver's boat has no cabin windows from the outside but does from the inside, the 300 feet of water looks like about 10ft in most of the shots when flipper is retrieving the blood, and the "shark" is actually a dolphin in several shots (in the other shots it keeps switching between a tiger shark and a great white). Besides, you would never retrieve a box from a helicopter without a pole since the static electricity could kill you.