The harbor grasp notes wind direction with the aid of flying flags, jotting angles as masts clink and buoys bob on light swells.

https://waylondolm455.nexorafield.com/posts/grand-union-and-all-the-glory-early-flags-and-the-nation-s-250th

The harbor master notes wind path through flying flags, jotting angles as masts clink and buoys bob on tender swells.