Aids to Navigation

Navigation Aid Basics

Unlike the roads and highways that we drive on, the waterways we go boating on do not have road signs that tell us our location, the route or distance to a destination, or of hazards along the way. Instead, the waterways have AIDS TO NAVIGATION (or ATONs), which are all of those man-made objects used by mariners to determine position or a safe course.

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These aids also assist mariners in making a safe landfall, mark isolated dangers, enable pilots to follow channels, and provide a continuous chain of charted marks for precise piloting in coastal waters. The U.S. Aids to Navigation System is intended for use with nautical charts, which provide valuable information regarding water depths, hazards, and other features that you will not find in an atlas or road map.

The term "aids to navigation" includes buoys, day beacons, lights, lightships, radio beacons, fog signals, marks and other devices used to provide "street" signs on the water. Aids To Navigation include all the visible, audible and electronic symbols that are established by government and private authorities for piloting purposes.

The Coast Guard is the agency responsible for maintaining aids to navigation on U.S. waters that are under federal jurisdiction or that serve the needs of the U.S. armed forces. On bodies of water wholly within the boundaries of a single state, and not navigable to the sea, the Coast Guard grants the state responsibility for establishing and maintaining aids to navigation. The U.S. Corps of Engineers is responsible for many of the canals, dams, locks, and other man-made waterways in the country. The Corps also is responsible for the regulation of mooring buoys in all navigable U.S. Waters.

The individual Coast Guard districts also may grant permission to private groups and citizens to place "Private" Aids to Navigation. These aids allow individuals or organizations the ability to mark privately maintained channels, zones or waterways. These aids must be pre-approved, and must be maintained by the individual or organization.

Types of Aids to Navigation

The term "aids to navigation" encompasses a wide range of floating and fixed objects (fixed meaning attached to the bottom or shore), and consist primarily of:

• Buoys - floating objects that are anchored to the bottom. Their distinctive shapes and colors indicate their purpose and how to navigate around them.
• Beacons - structures that are permanently fixed to the sea-bed or land. They range from structures such as light houses, to single-pile poles. Most beacons have lateral or non-lateral aids attached to them. Lighted beacons are called "LIGHTS", unlighted beacons are "DAYBEACONS".

Both Buoys and Beacons may have lights attached, and may have a sound making device such as a gong, bell or horn. Both Buoys and Beacons may be called "marks".

Caution: Do not count on floating aids to always maintain their precise charted positions, or unerringly display their characteristics. The Coast Guard works constantly to keep aids on station and functioning properly, but obstacles to perfect performance are so great that complete reliability is impossible. Only use floating aids for use as a navigation fix when you cannot see a fixed point of reference.

Aids to Navigation Systems

Depending on where you boat in America, you may see several differences in how navigational marks are colored, numbered, or lighted. Regardless of the location, buoys and beacons are placed in very specific locations, to mark either a particular side of a waterway, or some other navigational feature. The primary system in use is referred to the "U.S. Aids to Navigation System". The U. S. Coast Guard maintains this system in conformance to the International Association of Lighthouse Authorities (IALA), which is an international committee which seeks to ensure safe navigation, primarily through the use of common navigation aids and signals.

The "LATERAL" system is the familiar RED RIGHT RETURNING system, meaning that on all navigable waters returning from sea, the red even-numbered marks are on the starboard (right) side of the channel and the green odd-numbered marks are on the port (left) side of the channel. Numbers on the marks ascend when traveling from sea to harbor--if you don't have a compass and become disoriented on the water, you will always know you are heading upstream if the buoy numbers get larger as you travel.

Port Side Odd Numbered Aids

Port side numbered aids are green in color, odd numbered and may be lighted. Port side marks are located on the left side of the waterway as you travel upstream, and the buoy numbers will increase as you head upstream. (Chart depictions are shown next to the marks) Port-Side Buoys have a cylindrical above-water appearance, like a can or drum floating on its axis. Commonly referred to as "CAN" buoys. Beacons - Port side beacons have square marks attached to them, with two shades of color and a reflective border.

Starboard Side Even Numbered Aids

Starboard aids are red in color, evenly numbered and will be on your right side as you travel upstream. Buoy numbers increase as you head upstream, and may have a red light. Starboard-side buoys have an above-water appearance like that of a cylinder topped with a cone, pointed end up. The cone may come to a point or be slightly rounded. Commonly referred to as "NUN" buoys. Starboard-side Beacons have triangular marks attached to them, with two shades of color and a reflective border.

Intracoastal Waterway

For the sea buoys that delineate channels off the coast of the United States, and for the Intracoastal Waterway (ICW), red is on the right (shore side) when proceeding clockwise around the U. S. from the East Coast to the Gulf Coast, or proceeding north along the West Coast.

ICW marks are further identified by a small yellow reflector at the bottom of the mark. The same port and starboard marks shown above will look like the following.

Numbers on the marks ascend when traveling in this direction. Where the IALA-B and ICW marks meet, one must be very careful to observe the change in meaning by referral to local charts.

Other Aids - Marks

Dayboards

These diamond shaped marks are used to help the vessel operator determine location on a nautical map. When you see a dayboard, and find the corresponding mark on the chart, you know your precise location. They may be lettered, and may be lighted with a white light. Their color reflects that of nearby lateral marks.

Safe Water Marks

These marks are used to mark fairways, mid-channels, and offshore approach points. They have unobstructed water on all sides. These marks may be lettered, and may be lighted with a white light. They may also have a red top mark.

Isolated Danger Marks

These indicate a danger which may be passed on all sides. They are erected on, or moored on or near danger. They should not be approached closely without special caution. They may be lighted, and they may be lettered.

Special Marks

Special marks have no lateral significance (meaning they don't tell you which side of the channel or river you may be on). These marks are used to mark a special feature or area. These include area limits for anchorages, fishing grounds, or dredging/spoil areas. These buoys may be lighted, and if they are it will be a fixed or flashing yellow light. Shape is optional, but usually follows the shape of the navigation buoys that it is positioned near.

Other Aids - Miscellaneous

Mooring Bouys

Mooring buoys come in two different shapes; spherical and cylindrical. Both have white bodies with a solid blue horizontal band on the center of the buoy. Mooring buoys may have a white reflector, or a white light attached to them. Mooring buoys are the ONLY buoys to which you may legally tie your boat. Buoys are generally placed in marked anchorage areas, and you must take caution if you are traveling near buoy areas. Check your state boating guide for particular operating restrictions in anchorage areas.

Ranges

These are pairs of unlighted or lighted fixed aids that when observed in line show the pilot to be on the centerline of a channel.

Regulatory Marks

Regulatory Marks re designed to assist boaters by informing them of special restrictions or dangers that they are approaching. Regulatory marks are white "can" buoys that have an orange shape on them. The mark will give either a warning or instructions on how to proceed. The shape determines what type of mark it is.

• An open diamond shape signifies danger.
• A diamond with a cross in it signifies an exclusion area that you may not enter.
• A circle indicates an upcoming operating restriction, such as a speed limit.
• A square or rectangular shape is used for conveying instructions.

Uniform State Waterway Marking System

This system was originally intended for use by states on lakes and inland waterways that weren&#;t covered by nautical charts. The buoys used in the Uniform State Waterway Marking System (USWMS) used colors, shapes and marking patterns that differed greatly from the U.S. Aids to Navigation System (ATONS).

In , the U.S. Coast Guard decided to phase out the USWMS to avoid potential confusion of boaters and instead, favored using the more widely recognized ATONS. By , the USWMS was completely phased out. Below are a few of the differences from the federal system you should know about.

Here's a summary of the important changes regarding the phase out of USWMS:

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• The old USWMS black port side channel markers are now GREEN can buoys.
• The old USWMS red starboard side channel markers are now red NUN buoys.
• The old USWMS red and white vertically striped buoys have been replaced by one of the following: a red or green channel marker directing safe passage, an orange and white regulatory marker, or a red and black isolated danger marker.
• The old USWMS white buoys topped with black or red bands, have been replaced by one of the following: a red or green channel marker directing safe passage, an orange and white regulatory marker, or a red and black isolated danger marker.

Lateral Aids

The state system differs in several ways, in case you happen to encounter them. These aids also assist mariners in making a safe landfall, mark isolated dangers, enable pilots to follow channels, and provide a continuous chain of charted marks for precise piloting in coastal waters. The U.S. Aids to Navigation System is intended for use with nautical charts, which provide valuable information regarding water depths, hazards, and other features that you will not find in an atlas or road map.

• Buoys are placed in pairs, and you pass between them.
• State buoys do use the color red for starboard side marks, but they are cans, and not nuns, while port buoys are black and can-shaped.
• Numbers on buoys go up as you head upstream, or towards the head of navigation.
• Portside buoys use the color black instead of green.
• Portside buoys are numbered with odd numbers.
• Portside buoys may show a green reflector or light.
• Starboard side buoys are red.
• Starboard side buoys are numbered with even numbers.
• Starboard side buoys may show a red reflector or light.

Other State Aids

Red-topped White Buoys

• Signify that you may pass south or west of buoy
• May be numbered
• May show a white reflector or light

Black-striped white Buoys - Inland Waters Obstruction Mark

• Signify that you should not pass between mark and nearest shore
• May be lettered
• May show white reflector or light
• Replaces the old red and white vertically striped buoy

Black-topped White Buoys

• Signify that you may pass east or north of buoy
• May be nubered
• May show white reflector or light

Marine Navigational Aids to Have Aboard Your Boat

The U.S. Coast Guard stresses the importance of following the guidelines provided by them to promote boating safety. Those guidelines advise boaters on how to be prepared and ready for almost anything on the water by taking the guess work out of boating safety; and among other things has determined what is considered required boating safety equipment and navigational aids.

Marine navigational aids would consist of maps and charts, knowing the &#;Rules of the Road&#;, a two-way communication system, and a Global Positioning System.

It would be hard to find a person who is not familiar with what a &#;GPS&#; is and what they are used for. Many people have one in their automobiles and the number of those people with GPS for boats is growing.

Is it a good idea to have a GPS for boats, as part of the marine navigational aids on board your boat? Sure it is &#; but, maybe not as a stand-alone all in one navigational aid.

As a boater, you could use a regular GPS for your boat, whether it is a hand held or stationary mounted model. Since both the regular GPS and the GPS for boats will tell you where on earth you are and both will either have maps already downloaded or for a small fee, you can get maps downloaded from the Internet, either one would work in conjunction with the charts and maps.

But, when deciding which is best for you there are a few things you would want to keep in mind. Marine GPS for boats do have a few or a lot of other tricks designed for boaters, depending on the amount of money you want to spend, such as:

• Water depth
• Predicting tides
• Charting and plotting a navigational course
• Not only the &#;You are Here&#; feature but will remember the courses you take and will show you the way next time with the navigate to track feature
• Fish finder options
• Compass and charts stored within the gadget
• Warn of obstacles in the path of the vessel
• accurate speed, distance/time to way point and course made good readouts, as well as a digital compass
• you can see where you are and where you are going even if you cannot see anything else, like in fog or bad weather
• Man Overboard feature that with just a touch of a button the operator can mark the position of an incident
• The costly ones can even send photographs in real-time of a storm many miles away

So, depending on the bells and whistles you require will determine the cost of the gadget. Any way you go, the GPS will be a good addition to your navigational aids.

It is said that maps and charts are the most important part of any navigational aids. Sailors have been exploring this world with the aid of maps and charts for centuries &#; that has not changed.

Maps and charts are very different from one another. Charts show what is beneath the surface of the water, what cannot be seen just by looking, but is necessary to know for safe and effective navigation, while maps only show the surface, and cannot be used to plot your course. There are too many things that weather and man has had effects on and maps are stagnate, charts are not. Charts and maps can be purchased online.

The next part of your Marine Navigational Aids is knowing the &#;Rules of the Road,&#; which is essential in boat navigation. The USCG states &#;Aids to Navigation Are the Waterways&#; Road Signs.&#; Safely driving a car would be nearly impossible if you did not know street signs, stop signs, barriers, detours and even stop lights.

The USCG has a pamphlet &#; U.S. Aids To Navigation System &#; which they recommend be printed and kept on board as part of the navigational aids.

It is important to know the basics at least, and the more you know, the safer you, your family, and your boat will remain. You will learn what to do when you have to interact with other boats and how to read the charts &#; symbols and colors &#; which you will encounter on the water.

For instance, when in a channel, and you are heading to shore with open water behind you, make sure the red colors and lights remain on your starboard side (right side) and when heading out to open waters, the green colors and lights remain on your starboard side; some boaters use the &#;3R Rule&#; which is &#;Red, Right, Returning.&#;

When coming up to another boat, head to head, each would preferably pass port to port side with one short horn blast to alert your intent, and one short blast for agreement. If it is necessary to pass starboard, then two short horn blasts from both boats.

It is always the preference to pass on the port side with one short blast.

It is also imperative to learn the colors and images for warnings. Each color and design is there to give warning that for whatever reason, a boat is not allowed or permitted in an area.

Taking these extra steps, learning the &#;Rules of the Road,&#; is only part of the Marine Navigational Aids.

It is also recommended to have a two-way communication system of some sort on board. We all know that cell phones do not go every where and often lose their connectivity when out on the water.

Keeping everyone on board your boat and around your boat safe is the responsibility of the operator and is required by the USCG and your boat insurance company.

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