Heck I wish most people knew this.
Crossing paths
Your vessel: You’re on a crossing course with another vessel that could result in a collision if neither boat changes course or speed.
The other vessel’s on the right: It’s the privileged or stand-on vessel and you must let it pass in front of you.
The other vessel is on the left: You’re the privileged or stand-on vessel and you must pass in front of the other vessel.
Meeting a boat head-on
Your vessel: You’re meeting another vessel head-on.
Both vessels: You should both steer to the right to such a degree that each can see the other’s intentions to pass safely portside to portside (left to left, for the landlubber).