Off the wind:
When a vessel is sailing off the wind the tack is determined by the position of the main boom. For instance, if a schooner or yawl is running wing-a-wing with the main boom off on the port side she is on the starboard tack.
When a vessel is sailing off the wind the tack is determined by the position of the main boom. For instance, if a schooner or yawl is running wing-a-wing with the main boom off on the port side she is on the starboard tack.