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
both yotties and pangeros are able to see lower placed lights in a hill ringed anchorage. masthead lights do not stand out.
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.