United States Coast Guard Captains License Practice Exam

What may be used to indicate the presence of a partly submerged object being towed?

1. A black cone, apex downward

2. An all-round white light at each end of the tow

3. A red all-round light

4. All of the above

The correct answer is: An all-round white light at each end of the tow

The use of an all-round white light at each end of the tow is a standard practice for indicating the presence of a partly submerged object being towed. This lighting pattern provides clear visibility at a distance, ensuring that other vessels can see the tow and understand that it is being moved through the water. The all-round white lights help mark both ends of the tow, making it recognizable for navigation safety during both day and night, thus preventing collisions and enhancing maritime safety. In the context of navigation and towage, the all-round white lights serve as signaling devices to indicate the presence of the object being towed, particularly in situations where visibility may be limited. The absence of these lights could lead to dangerous situations since other mariners would not be aware of the presence of the towed object.