your yottie preferred masthead lights are NOT uscg mandated.
the MANDATE is for a 360 light brightly seen 2 to 3 miles distant.
traditional lower level lights
work best.
both yotties and pangeros are able to see lower placed lights in a hill ringed anchorage. masthead lights do not stand out.
place
anchor lights on foretriangle or above mainboom and / or light
cockpit very well so folks can see you.
masthead lights are not visible in an anchorage ringed by hills with well lighted homes and businesses.
this has been spoken by many for many years.