Visibility Observation
You are taking weather observations in extremely low visibility conditions. You can barely see beyond the rails of the ship in each direction around you. What would you use as reference points to determine the visibility value? Choose all that apply.
The correct answers are a) and d).
Knowing the dimensions of the ship you are serving on is very useful in low visibility conditions. For example, if the ship is 831 feet long and you can barely see its edge from an observation post midway on the ship, the horizontal visibility is around 400 ft. If you are on the flight deck and can barely see the top of the mast about 120 ft above, the vertical visibility is around 120 feet.