Port= left. Four letters in each. Starboard = right. Channel markers and lights =Red, right side, returning from sea. Another, remember "port wine" is red. My deckhands still, after two years of doing it, still get the lights on the wrong side of the barge occasionally. I keep telling them, "Look back at the tug, put the lights on the same sides as on the tug". They still get it wrong sometimes! lol What really throws them is the running lights on other vessels. If you know the lights, you can tell the type, size, direction, aspect, and operating characteristics of the other vessels.