Port-Hand marks are black with odd numbers. Pointers indicate deep water inside the channel.
Black Dolphin includes a square daymark and a flashing light for nighttime navigation.
Black Cans are good tide indicators. They lean in the same direction current is flowing.
Black Ranges must be kept in perfect alignment, with circle directly on top of the diamond.
Black Daymarks are square—waterway symbol for marks that should be left to port.
Yellow Triangle on a black harbor buoy means waterway travelers leave buoy to starboard.
Starboard markers are painted red, carry even numbers. Pointers indicate navigable water.
Red Nuns are starboard counterparts of black cans, also make good tide direction-finders.
Red Ranges should be approached same as black—dead ahead and in perfect alignment.
Red Daymark is triangular—waterway symbol for markers to be left to the starboard hand.