If you do use a tricolor or anchor/strobe make sure that the light is not obfuscated by antennas. We were using an ultrasonic sensor that required its own 7/8" mast
and placed even a foot or more away, it hid the light from directly forward.
So, if you put antennas up there be sure to use thin wire antennas.
Also, test all the equipment
together on the dock
before putting it aloft. RF issues are real and can play havoc with each other. For example - when we have our tricolor LED it interferes with our mast
enough that people have trouble hearing us from just a few miles away.