Rules of the Road: INTERNATIONAL ONLY When two vessels are in sight of one another, all of the foll...

ROR 14

Great job

Ummm I'm driving around on a beautiful day and sight a boat that signals with 4 short blasts ... on closer approach I notice it is a pilot vessel 'engaged' in his work. Somebody should inform the pilot vessel his signal does not exist or can be used.... ummm when? I don't want to be a smart #$% but this stuff twists me up. If there is a clarifying circumstance please post ur comment.
REF: 35.k

VERY poor question.
A. Must supplement a whistle signal, then it may be repeated. So for one to choose this they need to add information that is not in the question.
D. Four short can be used when in or near an area of restricted visibility, even if another vessel is in sight.

This question’s answer is wrong.

I agree with previous commenters on this one. Yes, the 4-short pilot ID signal is listed under Rule 35 for use in restricted visibility, but it certainly does not restrict its use in any way when in sight of another vessel (a pilot vessel can easily be in restricted visibility and still in sight of another vessel). Normally a "best choice" can be determined but in this case it is a long stretch to believe this is a valid answer to this question.

You just have to know what signals are real signals.