Under the IALA - A Buoyage System, a buoy used as a port hand mark would not show which light characteristic?

Correct Answer: Option A — Group Flashing (2 + 1)

In USCG General Navigation principles (Bowditch, Light Lists, and Coast Pilots), regarding 'Under the IALA - A Buoyage System, a buoy used as a port hand mark would not show which light characteristic', the verified fact is: 'Group Flashing (2 + 1)'.