Lights Required for Sailboats When Underway
Sailboats under power must conform to motorboat navigation light requirements.
If 40 to 65 feet long, these vessels must exhibit the lights as shown in Figure 2:
- Red and green sidelights visible from a distance of at least two miles (or if less than 40 feet long, at least one mile) on a dark clear night
- A sternlight visible from a distance of at least two miles.
An alternative to the sidelights and sternlight is a combination red, green, and white light, which must be exhibited near the top of the mast.