Rule 9 of the Collision Regulations, which addresses Narrow Channels, has a lot of moving parts. There are a variety of impede relationships on top of all the normal give way relationships, some of which apply all of the time and others only when you can't safely navigate outside of the channel. There are also a bunch of new sounds signals in there too.

This is a recording of the Masterclass from 2020. Both video and audio versions are available within the course for you to enjoy as many times as you like for six months after you purchase it.