When Lieutenants Green and Foster stop to say goodbye in the corridor Green initially has his backpack draped over his right shoulder, then when Foster turns back after starting to walk away Green is no longer carrying or holding his backpack, nor is it seen sitting on the ground next to him.
CDR Chandler orders that only non-lethal weapons be used against civilian boats. To that end Lt. Foster indicates she is bringing the LaWS and LRAD weapon systems online. LRAD stands for Long Range Acoustic Device and is used to emit extremely loud sounds to disorient and stun, these weapons have been in use on U.S. Naval warships since 2004. However the LaWS is a fairly new weapons system designed for surface naval warfare, specifically against small vessels and aircraft, LaWS stands for Laser Weapons System. It is a directed energy weapon with variable intensity, on low levels the laser can be set to a wide angle and be directed into the eyes of an enemy vessel's crew to temporarily blind and incapacitate them; on high intensity a narrow beam can be used to destroy an enemy vessel's sensors, disable vessel engines, detonate explosives such as mines or missiles and to destroy small aircraft such as UAV's. As of 2014 (the time the outbreak started) the only U.S. Navy warship equipped with a LaWS weapons system is the U.S.S. Ponce, an Austin-class amphibious transport ship, and at that time it was still an experimental weapon, it was installed on the Ponce for field testing. This testing took a few years and upon the Ponce's decommissioning in 2018 the LaWS was deemed to be a success and was moved from the Ponce to her sister ship the U.S.S. Portland. As of 2018 the Portland is the only U.S. Naval warship equipped with a LaWS, so the Nathan James would not have been equipped with a LaWS when it left port in 2014. Though the U.S. Navy has ordered two additional LaWS systems, one is to be installed on the U.S.S. Arleigh Burke, the prototype and first ship of the Arleigh Burke-class guided missile destroyers like the Nathan James, the LaWS system is expected to be delivered and installed in 2020.
In views from the ocean looking toward the shore we see mountains and high cliffs. There are no mountains in Louisiana.
When the Nathan James is off the shore of Louisiana about to head up the Mississippi River, you can see coastal Louisiana from the ship, but you see jagged mountains, of which there are not any on coastal Louisiana, which is mostly at or just a few feet above sea level.
Much of season 2 features a cat and mouse game between the Nathan James and a rogue British submarine, with the Nathan James continuously frustrated in its efforts to locate, track and engage the enemy sub. Throughout it all Captain Chandler utterly fails to employ one of his most lethal anti-submarine warfare (ASW) assets - the MH-60R Seahawk helicopter that all Arleigh Burke-class destroyers of this type carry, and which were specifically designed for this purpose. Capt. Chandler only makes a couple casual references to the helo, almost as an afterthought, an omission that would constitute gross incompetence by a combatant commander. This failure is particularly egregious when the ship needs to quietly broaden its search area to locate the sub, get a targeting solution when it thinks it's located the sub, or later when the ship's own sonar has been damaged. While the MH-60R's capabilities are most effective when integrated with surface ships, the helicopter can conduct ASW search and destroy operations completely on its own (and can do so without compromising the ship's position) by deploying both passive and active sonobuoys, dipped sonar, advanced Periscope Detection and Discrimination capabilities, and dropping Mark 46 torpedoes on confirmed targets. Of course had Captain Chandler launched his Seahawk the enemy submarine story line would have been cut quite short.