Question

1. a sailboat is underway in the fog. what sound signal should you hear?

a. one prolonged blast plus two short blasts every two minutes
b. one prolonged blast plus two short blasts every thirty minutes
c. two prolonged blasts plus ten short blasts every forty-five minutes
d. two prolonged blasts plus ten short blasts every two minutes

Explanation:

Identify the vessel type and condition

The question asks for the sound signal of a sailboat underway in restricted visibility (fog). Under the Navigation Rules, a sailing vessel underway is classified as a vessel with restricted maneuverability relative to power-driven vessels.

Apply the restricted visibility rules

According to Rule 35 of the International and Inland Navigation Rules, a sailing vessel underway in or near an area of restricted visibility must sound a specific signal at intervals of not more than two minutes.

Determine the specific sound signal

The required signal for a sailing vessel underway in fog is one prolonged blast followed by two short blasts (\(— \cdot \cdot\)) at intervals of not more than two minutes.

Evaluate the given options

• Option A: "one prolonged blast plus two short blasts every two minutes" matches the rule perfectly.
• Option B: Incorrect interval (thirty minutes).
• Option C: Incorrect signal and interval.
• Option D: Incorrect signal.

Answer:

• (A) one prolonged blast plus two short blasts every two minutes (Correct answer)
• (B) one prolonged blast plus two short blasts every thirty minutes
• (C) two prolonged blasts plus ten short blasts every forty-five minutes
• (D) two prolonged blasts plus ten short blasts every two minutes