"WebKatz" writes: Does the white light have to cover 360 degrees?

No. The light is to be shined to avoid a collision. I personally would flash
it across the "target" (hazardous vessel) and then back to my illuminating my
boat.

This could have the unintended effect of implying you want them to come closer.


Also keep in mind a large vessel like a ferry or barge is not going to be able
to change course or stop to avoid hitting you. As someone else posted, act as
though no one else sees you and avoid them.

Brian Blankinship