Canadian Boating Practice Exam

What lights must a power-driven vessel display in periods of darkness or reduced visibility?

1. Sidelights only

2. All-round light only

3. Sidelights and an all-round white light

4. Masthead light only

The correct answer is: Sidelights and an all-round white light

In periods of darkness or reduced visibility, a power-driven vessel must display both sidelights and an all-round white light. This is important for visibility and to indicate the size and direction of the vessel to avoid collisions. Choosing only one option, such as sidelights only (A), masthead light only (D), or all-round light only (B), would not be sufficient to comply with regulations and could potentially lead to dangerous situations. It is also incorrect to just display a masthead light as it is meant for sailboats, not power-driven vessels. By displaying both sidelights and an all-round white light, a power-driven vessel can properly indicate its position and direction to other vessels.