Confidence votes 18.5K. BMC is the rate/rank designation for a Chief Boatswain's Mate (read Boatswain's Mate, Chief). SW  is the sailor's Warfare Qualification Designator, in this case, Surface Warfare. Written correctly, it would read BMC(SW) .
FOB stands for Free On Board or so there is no line item payment by the buyer for the cost of getting the goods onto the transport. There are two possibilities: FOB origin, or FOB destination. FOB origin means the transfer occurs as soon as the goods are safely on board the transport.
Actually Fob means the following: 1. (Noun) A cheat, con artist, or generally deceitful person. 2. (Noun) A very small pocket usually located in the waistband of a pair of trousers for carrying such valuables as money or a pocket watch.3. (Noun) The chain or tag attached to a small, valuable object like a watch or keys. 4. (Verb) To con, cheat, swindle, usually used with off, that is, to fob off. fob chain was used to more easily pull valuables from fob pocket, which is very small and tight, especially if sewn into the waistband of a pair of trousers.