Shaun the bartender tells Belle Buckley that the reason he moved from Galveston Texas to North Carolina was because he wanted to be near the water. Galveston is a port city on the Gulf of Mexico.
The gun the dad unloads on the boat would hold 12-17 rounds, depending on the magazine, but there are only four rounds in the gun. No one would only keep 4 rounds in a gun that holds so many more.
Both the father and the son order alcoholic drinks "on ice." The term is "on the rocks," no one says on ice. "Bourbon on ice" is just wrong.
As a segue into a dinner scene, they show the sun setting over the ocean, but the show is supposed to take place in coastal North Carolina, on the east coast of the US. The sun rises over the ocean there, it sets over land.