Corrected entry: There is a scene where Kevin Costner is teaching all the students about hypothermia and he dumps buckets of "ice" in the water. The ice is obviously plastic dumped in the pool as you can see it floating on the surface.
Corrected entry: At one point everyone is running in the woods. When they say "don't need no land, don't need no tree, out in the water that's where I wanna be," you can see the shadow of the helicopter that's shooting this scene.
Correction: If you look at the shadow of the helicopter, it is the outline of a Coast Guard Helicopter.
Corrected entry: In the "swim records" scene, the records listed are impossible to achieve in any Coast Guard vessel, let alone swimming! (500 yard gear swim in 5.48 seconds...800 yards...10.63 seconds, etc etc). That would equate to about 200 mph roughly. That's some FAST swimming.
Correction: You're misreading the time. It's not 5.48 seconds or 10.63 seconds. It's 5:39 and 10:49 Meaning 5 minutes and 39 seconds and 10 minutes and 49 seconds. Which is over 60 times slower than what you have him swimming.
Correction: Ice floats.