I have a passing familiarity with Tabatha Chase only but she sounds just about right here. It makes a lot of sense that there is some sort of fraternity between these freighter captains. These guys don't have a fleet to look out for them and get their back when they are in trouble, so they look out for each other. At least when they can get a break from arguing amongst themselves.
Carbo is a very likable character because of his shortcomings. Nobody will confuse him with a captain of a ship of the line, he's brash and self-assured as one in his profession should be but more often than not he just wings it and is often terribly wrong. Let's just hope his friends will be close to bail him out when that happens. That it will again, I have no doubt.