In a channel mark system, when traveling upstream (toward the head of navigation), which color buoys lie on the boat's starboard side?

• A. Red buoys lie on the starboard side
• B. Red buoys lie on the port side
• C. Green buoys lie on the starboard side
• D. Green buoys lie on the port side

Answer: (A)

When you’re moving upstream toward the head of navigation, you are returning toward port. In the standard buoy system used on U.S. waterways, red buoys mark the right-hand side of the channel and green mark the left. The rule “red, right, returning” helps you stay in the safe water as you head upstream. So red buoys will lie on the boat’s starboard (right) side. If you were going downstream, the red buoys would be on the port side instead.