When Chandler first gets on the bus he is clean shaven, the bus ride is only a few hours yet when they arrive at the compound he has a good day's worth of stubble on his face.
The Achilles comes to 'radio depth' but a) there's no such thing - 'periscope depth' would be used and b) the submarine surfaced when all it needed to do was expose a mast.
Green tells Chandler that "the nearest big city is St Augustine". At a population of just over 14,000, St Augustine hardly qualifies as a "big city". It's claim to fame is America's oldest city, not it's size. "Big" cities in that geographical area would be Jacksonville, FL to the north (Pop 903,000) and Daytona, FL to the south (Pop 68,000).
This episode is supposed to be located in Florida but was filmed in Long Beach, California. The school buses are California school district buses.
The Nathan James gives the vulture team coordinates of the heat signature as 30.136° N 81.678° W. Those coordinates are in the middle of the St. John's River south of Jacksonville Naval Complex. The heat signature image doesn't match the actual location.
Chandler and his team are in Palm Coast, FL. According to Green, the nearest "big city" is St Augustine. Green suggests to "head inland". Chandler then asks, "Yea, but north or south?" Inland would be heading west.. St Augustine IS north of Palm Coast.