Aqua Signal Series 43 How to Open, Bulb Replacement
There have been a few threads about the Aqua Signal nav lights. I thought this may be useful on how to open and replace the series 43. Need a very small screwdriver to carefully lift the plastic off the two catches.
I don't think it is made to have replacement bulbs but instead replace the whole unit. However the twin LED lights should last a long time otherwise would be expensive to replace.