Special Marks for Navigation Aids: Understanding Yellow Marks on the Water When navigating coastal and inland waterways, boaters rely on a standardized system of navigation aids to ensure safe passage. One important but often misunderstood part of this system is yellow special marks. Unlike red and green lateral markers that guide vessels through channels, yellow marks serve a different purpose: they highlight special areas or features on the water. What Are Yellow Special Marks? Yellow marks, officially known as Special Marks, are part of the International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA) buoyage system. Their primary role is to draw attention to a specific area, condition, or activity, rather…

Regulatory Marks: What Every Sailor on Lake St. Clair Needs to Know Regulatory marks are essential navigational aids designed to help sailors safely navigate oceans, seas, and inland waterways such as Lake St. Clair. These marks provide critical information about restrictions, hazards, and rules that boaters must follow to ensure safe and responsible navigation. What Are Regulatory Marks? Regulatory marks are white “can” buoys marked with orange symbols and, in many cases, black lettering. Unlike lateral markers that guide direction, regulatory marks are intended to warn, inform, or regulate boater behavior. When approaching one of these buoys, sailors should slow down, read the message carefully, and comply with the instructions shown. Common Types…