Question

united states coast guard auxiliary
u.s. department of homeland security
on-line test
test id: crew
test name: boat operations exam
question: 27 of 40 | remaining time: 02:50:37 |
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the standard symbol for a lighted buoy is a ________.

b \2\ or whatever number it is
diamond with a black square
a question mark
diamond with a circle at one end

Explanation:

In boating navigation (related to engineering/nautical science), the standard symbol for a lighted buoy is a diamond with a circle at one end. The other options don't match nautical buoy - marking standards: a diamond with a black square is for a day - shape of a specific non - lighted mark, a question mark is incorrect, and the numbered option is for lateral marks' numbering, not the symbol for a lighted buoy.

Answer:

Diamond with a circle at one end