Eq-30 what do two short horn blasts from another vessel mean in a meeting situation

This question is incomplete, here´s the complete question.

When power-driven vessels are in sight of one another and meeting or crossing at a distance within half a mile of each other, each vessel must use sound signals. What do two short horn blasts from another vessel mean in a meeting situation?

a. They intend to pass starboard side to starboard side

b. They intend to pass port side to port side

c. They intend to maintain course and speed

d. They intend to immediately stop and reverse engines

a. They intend to pass starboard side to starboard side

Explanation:

Using a whistle, horn or bell, a single short blast signals the intention to pass on the other vessel´s port side. Two short blasts indicate the intention to pass on the starboard side. Although passing on the port side is usually advised, sometimes that´s just not possible due to the presence of a dock, wrecked materials, or even other vessels on that side.

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