Page 33 - Attwood Marine Products Collection 2020

Boats at Anchor Vertical Separation of Lights
When anchored in other than designated areas, any boat under 50 meters Pole length and location determines light separation. On boats under 12
(164 ft.) must have a 360° white light in view (a single all-round light, a meters (39.4 feet), the all-round or masthead light must be located a minimum
masthead and transom light, or other means). of one meter (39-3/8 inches) above the red-green sidelights. One meter must
be the height separation measured from bulb filament centers.
H
H=one meter
or 39-3/8"
H

On boats of 12 to 20 meters (39.4 to 65.6 feet), the masthead light must be
at least 2.5 meters (8.2 feet) above the gunwale.

Boats Underway
This section outlines the navigation lighting required according to current Sailboats Under Motor Power:
U.S. Coast Guard and 72 COLREGS (International Waters) regulations. When When under power, sailboats are considered power boats and must operate
underway, the required navigation lights are: with power boat lights as previously outlined.

Sailboats less than 7 meters (23 feet) under sail:
• Sidelight pair or combined-1 mile
Power-driven boats less than 12 meters (39.4 feet) with max. • Transom Light—2 mile
speed over 7 knots: • Flashlight or lighted lantern.
• Sidelight pair or combined-1mile
• All-Round Light—2 mile or Masthead Light—2 mile
with Transom Light—2 mile.

Sailboats 7 to 20 meters (23 to 65.6 feet) under sail:
Three different light configurations may be acceptable:
1. Sidelights & Transom Light.
2. A Sidelight & Transom Light combined in one light
(a Tri-Color Light) mounted at or near top of mast.
3. Sidelights & Transom Light, or two All-Round Lights, mounted at or
Power-driven boats 12 to 20 meters (39.4 to 65.6 feet): near the top of the mast, the upper light being red and the lower green.
• Sidelight pair or combined—2 mile Small, Oar-Driven Boats:
• Masthead Light—3 mile and Transom Light—2 mile. • Sidelight pair or combined—1 mile
• All-Round Light may not be used.
• Transom Light—2 mile
• Flashlight or lighted lantern.
• Various other light requirements are outlined in the standards
regarding towing, vessels aground, and other special conditions.
• Consult the Inland Navigation Rules, 72 COLREGS, or USCG for details.

NAVIGATION OVERVIEW

LIGHTING 31