Red triangles or green squares fixed to poles are called what?

• A. Non-lateral markers
• B. Regulatory markers
• C. Daymarks
• D. Lateral markers

Answer: (C)

Daymarks are fixed markers used during daylight to show the sides of a navigable channel. The red triangles indicate the port-hand side, and the green squares indicate the starboard-hand side. They’re attached to poles along shorelines or in the water, not floating like buoys, so they provide daytime guidance on which side to pass.