There’s a common practice in the brotherhood of long-distance sailors that no one needs to teach you. When a boat enters or leaves an anchorage crews on the other boats wave in welcome or farewell. If you don’t know the people a casual wave will do, but when they are friends, even very new friends, it’s not unusual to line up on deck and give a hearty bon voyage. We may or may not see some of these folks again but for a few days or weeks we share a time and place and when one of us moves on we like to mark the occasion.
What a nice photo of Jim! : )