Lateral markers indicate which part of a waterway?

• A. Non-navigational hazards
• B. Depth contours
• C. The sides of a channel
• D. Regulatory information

Answer: (C)

Lateral markers show the edges of the navigable channel. They define the corridor you should stay in as you sail, guiding you between the marked sides. Typically, green marks designate one edge and red marks the opposite edge, so you can keep between them to stay in safe water. These markers aren’t about depth contours, hazards, or regulatory information — they’re about where the channel lies and how to stay within its limits.