Wellcraft Cruisers Manuel du propriétaire télécharger pdf (Page 31)

“Aids to Navigation” (U.S. Coast Guard pam-

phlet #123) explains the significance of various

lights and buoys. This and other pamphlets,

including the “Boating Safety Training Manual”

and “Federal Requirements For Recreational

Boats,” are also available from the U.S. Coast

Guard Headquarters.

Because of proposed alterations in buoys and

markers, contact the U.S. Coast Guard to stay

informed of changes.

The spoken word “MAYDAY” is the international

signal of distress. MAYDAY should NEVER be

used unless there is grave or imminent danger,

and you are in need of immediate assistance.

AIDS TO NAVIGATION

Aids to navigation (ATONS) help you to travel

safely on the water. They help you get from one

place to another, and are most helpful if you have

a nautical chart. NEVER tie your vessel to an

ATON. It is illegal, and blocks it from view of other

boaters, which can cause serious problems.

There are two ATON systems. The first system,

used on federal waters, is known as the Interna-

tional Association of Lighthouse Authorities

System B (IALA-B). The Coast Guard maintains

this system. The second system is the Uniform

State Waterway Marking System (USWMS). This

system is maintained by state authorities.

IALA System B

In the United States, IALA-B uses four types of

ATONS. These are lateral marks, safe water

marks, special marks, and isolated danger

marks. The Navigational Aids Chart at the end

of this section reflects these aids.

Red, Right, Returning

Red, Right, Returning is a basic rule to assist you

in using lateral markers. When you are returning

from seaward, keep red markers on your star-

board side when you pass them. These markers

may either be buoys or fixed ATONS. Since lateral

markers are either red or green, keep the green

markers to your port (or left) side.

Returning from seaward is very clear if you have

been on the ocean. You are returning to port. By

agreement, going up a navigational river is

returning from sea. The outlet ends of the Great

Lakes are also the seaward ends. Also travel-

ling from a large body of water to a smaller one

is considered returning from seaward.

You are returning from seaward if you travel in a

clockwise direction around the United States.

So, going south on the Atlantic coast, north

along the west coast of Florida, west along the

Gulf coast, and north along the Pacific coast is

returning from seaward.

Lateral Marks

Look at the left and right columns of the upper

part of The Navigational Aids Chart. (The chart

is at the end of this section.) These lateral

marks indicate the sides of navigable channels.

They consist of lighted buoys, CAN or NUN

BUOYS, and DAYMARKS. Each has a number

and is either red or green. The numbers on

green markers are odd. Red markers have even

numbers.

Buoys

Buoys are red or green floating ATONS. If

lighted, they have either red or green lights.

Unlighted green buoys, called cans, look like

cylinders. Unlighted red nun buoys have cone

shaped tops with their points cut off. Don’t

pass too close to a buoy. You may foul your pro-

peller in its chain.

Daymarks

Daymarks are red or green boards with num-

bers. They are on posts or groups of pilings tied

together and called dolphins. Daymarks and

their supports are daybeacons. Daybeacons

may or may not have lights. If a red or green

daybeacon has a light, it is the same color as

the marker red or green. Red daymarks are tri-

angular and have even numbers. Green

daymarks are square and have odd numbers.

Safe Water Marks

You can find Safe Water Markers at the center

of the Navigational Aids Chart. These signals

have vertical red and white stripes and mark

the center of navigable channels and fairways.

Safe water markers included both lighted and

unlighted buoys and daymarks. If it is lighted,

the light will be white, and will flash the letter A

in Morse code.

2-11

Buoys are anchored floating objects

and may not always be exactly in the

same position.

CAUTION

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Wellcraft Cruisers Manuel du propriétaire Page 31

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