Meg fell into the river and naturally on the zodiac she is wet. Yet, a short scene later, when the traitorous Gunny takes her off the zodiac, her clothes are dry.
The SADM is shown as being the size of a large trunk, about four feet wide and two high, and was difficult for Lt. Austin to lift. An actual SADM is designed to be small, portable and easily hidden, it comes in a bullet shaped carrying case (much like a duffle bag) and is only 18 inches long, 12 inches wide and 55 pounds in weight.
When the escapes fire on the helicopter tracer rounds are shown firing into the air. These are only fired from heavy, antiaircraft machine guns, to better allow gunners to see where they are shooting, especially at night. The escapes are all armed with small arms like M16's, hunting rifles and 9mm handguns, none of which would fire tracer rounds.
Sergeant Lowell has no magazine in his M16 rifle.
Harm, Meg and Kate Pike, while trying frantically to disarm a detonated nuclear bomb, trying every permutation they can think of, including the perp (Gentry)'s date of birth, which is given as 09-27-52, making the perp 43 years old, far older than Gentry would have been and more than a decade older than the actor playing him.
Lt. Austin says that Naval Station SEATAC has Poseidon nuclear missiles and SADM tactical backpack nuclear devices. Both of which were removed from service after the end of the Cold War and had been decommissioned by 1992, this episode takes place in 1995.
The sailor stealing the missile would not have driven through the barrier risking death when the guards shot at him as it turned out he was acting undercover and his death wouldn't have furthered his mission.