Question 145 Rules of the Road

The correct answer is C) visible for at least one mile. The explanation is as follows: 1) The question is asking about the requirements for the lights displayed on a vessel while underway. Answer C correctly states that the lights should be visible for at least one mile, which is a standard requirement for navigation lights on vessels. 2) According to the U.S. Coast Guard Navigation Rules, navigation lights on vessels must be visible from a distance of at least one mile. This ensures that other vessels can properly identify and track the movement of nearby ships. 3) The other answer choices are incorrect because they do not accurately describe the characteristics of the lights shown in the illustration. Option A is about sounding the whistle when leaving a dock, which is not relevant to the question. Option B is asking about a different set of lights. 4) In summary, the correct answer is C because the visibility requirement of at least one mile is the key characteristic of the navigation lights displayed on the vessel in the illustration.