On the subject of helocasting:

One means of Special Forces infiltration is "helocasting" or dropping from a helicopter into the water (whether a lake or ocean). Once dropped into the water the Special Forces Soldier would continue his infiltration via rubber boat or surface swim to shore - and then conduct his mission. https://nationalguardspecialforces.com/helocasting.htm

This insanity is called "helocasting" - which, loosely translates to "jumping out of helicopters into a lake or a river, while the helicopter is still flying along at 20 miles an hour from a height of about 20 feet". No parachutes here, just splashing into the lake. Then they would scramble into the boats and race for shore, load the boats into the chopper and start over again. Operationally this maneuver is often executed at night behind enemy lines. Today, however (a beautiful late Summer day), the scene was more like a great excuse for splashing about in the water. https://web.archive.org/web/20110420074433/http://washingtonguard.org:80/news/archive/fo-helocast.shtml