What color is the port sidelight on a power-driven vessel underway at night?

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Multiple Choice

What color is the port sidelight on a power-driven vessel underway at night?

The port sidelight is red. Under the navigation light rules, red marks the port (left) side and green marks the starboard (right) side. A power-driven vessel underway at night displays these sidelights to show its direction to other mariners, so seeing red indicates you’re looking at the vessel’s left side. White lights (for example, at the stern or as masthead lights) are used to indicate the rear or forward aspects, not the port sidelight.

The port sidelight is red. Under the navigation light rules, red marks the port (left) side and green marks the starboard (right) side. A power-driven vessel underway at night displays these sidelights to show its direction to other mariners, so seeing red indicates you’re looking at the vessel’s left side. White lights (for example, at the stern or as masthead lights) are used to indicate the rear or forward aspects, not the port sidelight.

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