When underway, all motorboats must exhibit the lights as shown in Figure 1. Remember, motorboats include sailboats operating under power. The required lights are:
- Red and green sidelights visible from a distance of at least one mile away on a dark, clear night.
- An all-round white light or both a masthead light and a sternlight. These lights must be visible from a distance of at least two miles away on a dark, clear night. The all-round white light (or the masthead light and sternlight) must be visible from all directions in a 360-degree circle.