At the beginning of the episode we see several shots of the submarine underwater. When she surfaces in order to take aboard Lt Rabb the sail of the boat on the surface is different than the one shown in the underwater shots.
A schematic diagram states that the U.S.S. Tigershark is supposed to be a Seawolf-class fast attack submarine. A lot of the exterior shots of the Tigershark are of a Los Angeles-class attack submarine, which have noticeable differences in appearance. The Seawolf-class has its rudders placed on the bow, whereas the Los Angeles-class has its rudders placed on the conning tower.
In some of the underwater shots, the submarine shown is an Alpha Class Russian Sub, the Tigershark is supposed to be a Los Angeles Class Attack Submarine.
When Lt. Austin is being lowered down to the submarine one of the crew members is standing on the conning tower and attempts to grab her with his hands, something that violates Navy procedure and could potentially get someone seriously injured, or even killed. When a helicopter is hovering in the air, especially during a storm with lots and wind and rain, the rotors are generating a massive amount of static electricity, someone being lowered from a helicopter in such conditions would accumulate a large static charge as well. The proper procedure is to wait for the person being lowered to touch both feet onto the conning tower, thereby grounding themselves and eliminating the static charge. If the person being lowered needs assistance the sailor standing on the conning tower uses a special grounded rod to grab the cable and guide the other person down until they touch the deck and ground out. A sailor standing on the conning tower is grounded, if they reached out and tried to grab someone being lowered from a chopper they would be completing an electric circuit and run the risk of a massive static discharge upon contact, large enough to cause serious cardiac damage and even death.
When the Tigershark surfaces to pick up the Jag team, a submarine in an Emergency main ballast tank blow surfacing procedure (Emergency Blow) is shown. This is not a standard maneuver, and wouldn't be used in other that an emergency (Ergo it's name).
During the recovery from the flooding due to the detonation of the charge in the piping related to the forward escape trunk, the background sound includes the recurrent and continuing "oogah" of a klaxon horn. Aboard a submarine of the US Navy a klaxon horn is used only as the diving alarm - two blasts to signal an order to submerge and three blasts to signal an order to surface. A klaxon horn is not used to announce a casualty, not flooding or any other casualty.
As Meg was lowered on the submarine, she falls and a crew member shouts "Get a SEAL in the water!" SEALs are special forces personnel who do deploy on submarines but not commonly. In such cases, crew members who are trained will dive to rescue.
The door to the cabin across from the CO's cabin has two nameplates on it: James Ricker and Angelo O'Neill, both names have the letters XO after them. XO stands for Executive Officer, which is the ship's second in command. There is only one XO per ship, and neither of these names are the ship's XO, which is Lt. Commander Scott.