Having read and reread and reread the ColRegs regarding navigation lights for small sailboats under 21' it is my impression that the currently available navigation lights (white "all round" and bi-color red/green lanterns) would be "legal" for my sailboat operating under power only (if I hang the "all around" white light off the boom); and if I was under sailpower only, I should turn off all navigation lights and rely on an "electrical torch" (i.e. flashlight) to alert oncoming boats as the "all round" light is 360* and not 135*. Am I correct?