Apparent wind speed blowing across a MODU under tow can be measured by a(n) __________.

Correct Answer: Option C — anemometer

An anemometer is the standard meteorological instrument used to measure wind speed. When a MODU is under tow, the anemometer measures the apparent wind, which is the vector sum of the true wind and the wind generated by the vessel's forward motion through the water or over the ground.