I think ch 14 is vessel traffic control, you can get a real time idea of whats coming in and their destination.
One Saturday afternoon I was anchored off China Camp in San Pablo Bay listening in heard a large ship coming through, heard CG remind the racers around Angel Island they had no right of way with said ship, that its destination was past Carquinez. When it came through we were awed, what a monster. Then that ship and another had a chat about the transition from San Pablo to Carquinez, inland boat "whats your depth" San Pablo ship 24' x" what's your?" Response was within 6", San Pablo boat said they would hold position and wait for the inland ship.
It was also an interesting lesson in good VHF use.