Was outbound to sea in a narrow channel under Rule 9, and we were still inside the demarcation line, so operating under inland.
I’m honestly not sure if they tried to hail him on VHF, but I know we didn’t sound signals as he appeared to be heading away from the channel before he cut in. Actually I’ve never heard a ship, either military or civilian, sound intention signals while in San Diego harbor / bay and passing a smaller boat like that, only when passing other larger ships. I’ve been stationed here since 2009, and obviously I’ve not observed every transit.
It happens all the time, welcome to San Diego. We almost got hit by a ~60 foot power boat doing around 7 knots with no one at the wheel at all, that was a month or so ago. When we sounded 5 short on that one, a dude came running out to grab the wheel and turned hard.