Question 369Navigation General70% to pass
What indicates a dual purpose buoy?
AI Explanation
The correct answer is D) Green buoy with a yellow square.
A green buoy with a yellow square topmark indicates a dual purpose buoy, which can be used either as a channel marker or a special purpose buoy. This type of buoy is used to mark areas such as anchorages, boat basins, or other special areas. The yellow square topmark helps distinguish this type of buoy from standard green channel markers.
The other answer choices do not represent dual purpose buoys. A red buoy with a horizontal yellow band, a red and white vertically-striped buoy with a red spherical topmark, and a red and white vertically-striped buoy with a vertical yellow stripe are all different types of channel markers or special purpose buoys, but do not indicate a dual purpose buoy.
Related Questions
#367 While proceeding downriver (descending) you sight a red diamond-shaped panel with small, red reflector squares in each corner on the left bank. Under the U.S. Aids to Navigation System on the Western Rivers this is a _______________.#368 Under the U.S. Aids to Navigation System on the Western Rivers, passing daymarks on the left descending bank are _______________.#370 You are approaching a multiple-span bridge at night. The main navigational channel span will be indicated by _______________.#371 You are entering an east coast port and see a buoy with a yellow triangle painted on it. What does the symbol indicate? #372 An alternating light _______________.