Boat for sure is a community supported site. We might earn comission from web links on this page, yet we have confidence in every recommended products.

You are watching: Which symbol on a regulatory marker is used to warn of a rock or other underwater hazard?

Regulatory mite are used to recommend you the situations, dangers, or directions. Castle may suggest shoals, swim areas, rate zones, etc. They can be easily determined by the orange bands on the top and also bottom of each buoy.

On the water, girlfriend will discover these markers post on the sides of buoys to help in navigation. Likewise known as non-lateral markers these space able to convey a wide selection of information. It’s vital to know what the icons mean, however. That method you have the right to tell a watercraft exclusion zone mite from obstruction markers. Or indigenous markers offered to represent swimming areas and so on.

There are number of kinds the regulatory mite you should know about.


Informational Markers

Informational markers feature orange squares. Lock may likewise be referred to as information buoys. Together the name suggests, these offer information. That can encompass things like ranges or directions. The may even just call you where you are.

Information: for displaying details such together directions, distances, locations, etc.

Control Markers

These regulatory mite are used to inform you about rules and also regulations. They cover the particular area wherein the mite is located.. Because that instance, a regulate marker might read “slow no wake” or “slow 5 mph.” This is established by the orange circle.

Whatever constraints are listed must it is in followed. Whereby that way a to wash restriction rate limit, or various other rule.

managed Area : type of control is suggested in the circle, such together slow, no wake, anchoring, etc. These space called manage buoys.

Hazard Markers

These regulatory markers function an orange diamond. That symbol suggests you need to be cautious. The marker will likely also indicate the nature that the hazard. For instance it might be warning girlfriend of shoals or rocks. Use the information listed to avoid the risk indicated.

Danger : The nature of danger might be indicated inside the diamond shape, such together rock, wreck, shoal, dam, etc. This is situated on what is called a risk buoy or a danger buoy.

Keep-Out Markers

These regulatory markers function an orange diamond through a overcome inside. Keep-out markers show that one area need to be avoided. That means anything from a swimming area come an area with intimidated wildlife. There might be various other reasons because that this regulatory marker as well. Stop these areas and also do no cross the boundaries.

Boat exemption Area: Explanation may be placed outside the crossed diamond shape, such as dam, rapids, swim area, etc. This is located on what is called a store out buoy or an exclusion buoy.

Other species of Markers


There are various other non-lateral markers at sea the you need to be aware of. This also administer information for you together a boater. It deserve to be in conjunction through these various other regulatory mite or not.

Obstruction Markers

An obstruction marker is determined by black and also white vertical stripes. Their presence indicates an obstruction come navigation. That means a covert hazard below the water. You must never pass in between an obstruction marker and also the shore.

Swimming Marker

A swim buoy is an all-white marker. Periodically these will likewise have lamp on them. A yellow light will flash every 4 second. As the name argues a swim mite marks a designated swimming area. These are often little and connected together through buoyant ropes. Lock are provided to rope turn off an area frequently the size and shape that a swimming swimming pool in open water.

Caution should be taken close to swim markers. There may be swimmers inside the designated area, but also outside. While numerous markers and buoys space charted, swimming markers often are not. For that reason, together a boater you need to be extra attentive any time you room close come busy locations near shore.

Safe Water Markers

Safe water mite are established by your red and also white upright stripes. Its visibility marks the finish of a channel. Once you view one it way that open, safe water is ahead. Girlfriend should have the ability to pass a safe water mite on one of two people side.

Mooring Markers

Unlike any other marker, a mooring marker has a physics purpose. A watercraft can in reality tie chin to among these. You may because of this see a mooring marker through a watercraft tied come it in ~ sea. This markers room while through a blue horizontal band on them.

This is the just kind of marker the you can legally hook your watercraft to. If you effort to hook your watercraft to any kind of other marker it might lead to fines.

Anchorage Buoy

This mite is yellow in color. It will function a black color anchor price on it. One anchorage buoy may have a light on it but not necessarily. If the does have a light, it will certainly be a yellow light the flashes when every 4 seconds.

An anchorage buoy is supplied to mark the outer age of an anchorage area. Your charts will have the ability to tell girlfriend water depths past these areas.

Cardinal Buoys

These markers are oriented to point out dangers. That is based on the four cardinal directions. That way danger come the north, south, eastern or west. These buoys room yellow with the directions indicated on the peak section in black.

North Buoy: The top, black part of this buoy features two arrows on peak of each various other pointed up. The bottom fifty percent is painted yellow. The direction suggests that safe water is located north of the buoy.

South Buoy: The top, yellow section of this buoy features two black color arrows on height of each various other pointed down. The bottom fifty percent is black. The direction shows that safe water is located south the the buoy.

East Buoy: This is black on top and also on the bottom. There is a band of yellow in the middle. The top functions two black color arrows on top of each other. The top arrow points up and the bottom arrow points down. The direction suggests that for sure water is located east of the buoy.

West Buoy: This is yellow ~ above top and on the bottom. Over there is a tape of black in the middle. The top features to black arrows on peak of each various other with their points touching. The direction indicates that safe water is situated west that the buoy.

Lateral mite vs Non-Lateral Markers


All of these markers we have been looking at space what is dubbed non-lateral markers. Obviously the begs the question of what specifically a lateral marker is and how that relates.

Lateral way to the side. Lateral buoys room buoys the are constantly used to mark the 2 sides the a channel. Not-lateral markers and buoys deserve to be uncovered anywhere in the water.

Lateral markers room the red and also green buoys that suggest the edges of safe areas in the water. When you return from sea to port or a harbor the green lateral markers will certainly be on your port side. The red later on markers will certainly be come starboard.

Green buoys are recognized as cans and also they space cylinder shaped. Red buoys are cone shaped and also are dubbed nun buoys. Both kinds are numbers. Environment-friendly cans will have odd numbers. Red nuns will certainly have also numbers. As you head upstream, the numbers will certainly increase.

See more: How Many Cups Is One Small Onion, How Many Cups Is A Small Onion

A bifurcartion buoy will be both red and also green. This is to indicate where a channel splits into two branches.