I was returning to home harbor after the Labor Day outing. The channel had several SUP's in it. One was "stalled" in the channel as a large trawler was approaching, overtaking the paddle boarder. I was nearby when I heard one short blast from the trawler which meant "I intend to leave you on my port side." Of course, the paddle boarder apparently thought the guy was honking to get out of the way, b/c that's the evident level of education for this sport at this time. I heard the boarder say to a friend: "What am I supposed to do now?" And then turn right toward the middle of the channel where the trawler had just "announced" was his intended path. Nothing happened, but now that these folks are maneuvering in "vessels" as we've been advised, what is to be done about right of way rules? Sometimes, there are many milling about right in the middle of a harbor channel or its entrance.