A Course for Safe Boating

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California Boating

A Course for Safe Boating

Glossary

port

The left side of a boat when you

are (inside) facing the bow; also a

destination or harbor.

powerboat

A vessel propelled by mechanical

means.

prolonged

blast

A whistle signal four to six seconds

long.

propeller

Wheel or screw mechanism that

pushes water aft to propel the boat.

rail

A protective edge on the deck of a

boat. 

regulatory

marker

A white and orange marker used in the

USWMS to indicate danger, restricted

operations, or an excluded area.

restricted

visibility

Any condition in which visibility is

restricted by fog, mist, falling snow,

heavy rainstorms, sandstorms, smoke

or other causes.

rigging

The general term for all the lines

(ropes) of a vessel.

right-of-way

The right and duty to maintain course

and speed.

rode

An anchor line and/or chain.

rope

In general, cordage as it is purchased

at the store. When it comes aboard a

vessel and is put to use it is referred to

as a “line.”

rowboat

A small, flat-bottom, pointed boat

propelled by oars.

rowing shell

Long, narrow and relatively unstable

craft powered by oars. Used for

recreation and racing. 

rudder

The control surface, usually aft by

which a boat is steered.

rules of the

road

The nautical traffic rules for

preventing collisions on the water.

running

lights

required to be shown on boats

underway between sundown and

sunup, and during periods of reduced

visibility.

sailboard

Also known as a windsurfer. A board

similar to a surfboard that is propelled

by wind and sails.

sailboat

A boat powered by wind and sails.

May or may not have an auxiliary

engine.

ship

A larger vessel usually thought of as

being used for ocean travel. A vessel

able to carry a “boat” on board.

short blast

A one-second sound signal given by a

vessel’s whistle.

sidelights

A green light on the starboard side

and a red light on the port side each

showing an unbroken light over an

arc of 112.5 degrees and so fixed to

show the light from right ahead to

22.5 degrees abaft the beam on its

respective side. In a vessel of less than

20 meters in length the sidelights may

be combined in one lantern carried on

the fore and aft centerline of the vessel

spar

Any pole, as a mast, yard, boom or

gaff, supporting or extending a sail of

a ship.

spar buoy

A channel marker that looks like a tall,

slender pole.

special

purpose buoy

A buoy having no lateral significance

used to indicate an anchorage area,

fish net area, spoil grounds, military

exercise zone, etc.

SPF

Short for sun protection factor. This

is a rating indicator of how effective a

sunscreen is in blocking the harmful

effects of the sun. 

spring line

Fore and aft lines used in mooring to

prevent a boat from moving forward or

astern while fast to a pier.

square knot

A knot used to join two lines of similar

size. Also called a reef knot.

stand-on

vessel

The vessel required to first hold course

and speed when nearing another

vessel; the vessel which has the right-

of-way. However, the stand-on vessel is

also required to take any action neces

sary to avoid a collision if the give-way

vessel does not take early and signifi

cant action.

stand up

paddleboard

A type of surfboard that provides

a platform for a person to stand up

and propel the device across the

water with a long-handled paddle.

The Coast Guard considers the stand

up paddleboard to be a vessel when

it is used outside of a swimming,

bathing, or surfing zone, subject to the

navigation and safety rules of other

paddlecraft. In California, the stand

up paddleboard is always considered

to be a vessel when a paddle is used

or carried, making it always subject to

the navigation and safety rules of other

paddlecraft.

starboard

The right side of a boat when you are

(inside) facing the bow.

steal your

wind

When any vessel or object blocks a

sailboat’s wind.