By adapting a car windscreen ice scraper I made a bracket for two GPS units. The mounting rod to which they are attached had been fitted to ‘Talitha’. Originally it was the leg of an aluminium seat.
I devised the system to be stowed on the port side within the cabin by the companionway. To deploy the GPS units I unhook a bungee and attach another. For the near future I shall power them with internal AA batteries. Later, I may link them to a 12 volt ship’s battery.