1 pt each

What is a range, and how are two lights used to establish a range?

Why would three lights be used?

What are the factors that determine a single light's visible range?

How are red sector in lights used?

Why are lighthouses all designed differently?

At night, what danger should a helmsman be aware of when
steering for a lighted bouy that is being used as a way point?

What is a Morse Code "A" light mean?