Coming back into LA harbor one day I was at the helm of my friends 49 Hunter when the Coasties pulled along side and 3 of them stepped on board after saying "maintain your course"...one of the boarders looked suspiciously young and nervous...you betcha....I asked the older 1st class that stayed with me in the cockpit "is this a training day?" and he answered with a smile, " yup...qualification day for a newbie" They asked the standard questions about the documentation papers and lifejackets..flares etc and then left with a 'have a nice day'. Another time a friend and I were cruising up the LA river main channel right after 9-11. As we passed by the Coast Guard station at the mouth of the channel a CG inflatable zoomed up and warned us rather loudly that we needed to be at least 500 ft away from their pier. My friend pointed at the HUGE tanker coming down the channel and suggested that we might have a problem. They took a look at our 30ft sailboat and with a smile mentioned in a normal tone of voice that "The Chief" was watching and perhaps we could move a bit further away from the pier and still stay safe. They stayed between us and the pier until we were clear of the tanker and then as we headed further out into the channel they turned around and followed the tanker out into the harbor.