Couldn't have been a gillnetter from Gloucester, they are such a pleasant bunch
Always call the coast guard or enviromentals, a camera is a plus too.
Another tip, always look for a gillnetter, most look like lobsta boats. You see him a couple hundred yards away get off of your spot, make it look like you are trolling or just going along, once gone, go back to that spot where you were catching. Sometimes they will sit off a ways and glass you and if they see you catching they will be over.