Which markers are used to advise of situations, dangers, or directions and are not used for navigation?

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

Answer: (B)

Non-lateral markers are the aids that carry information beyond simply defining the edges of a channel. They’re used to alert you to situations, dangers, or special directions rather than to guide you along the navigable path. This category includes marks that indicate hazards (like isolated danger marks), tell you which direction is safe relative to a hazard (cardinal marks), or show areas with specific rules (special or regulatory marks) and safe-water indications. They exist to inform and warn, not to serve as the boundary lines of a channel for navigation. That advisory, information-focused role is what sets non-lateral markers apart from the marks that actually define the channel’s sides, which is why they’re the best fit for the described purpose.