Navigation lights, radar scanners, spreader lights and everything electrical on deck take a beating in season. More salt creeps in than we’d like to imagine, then it attracts damp all winter long. The quantities may be small, but the effects often are not when spring comes around. One way to minimise the grief is to switch on everything during your fortnightly visit, and keep them all burning until you leave. So long as you’re running the engine at the same time, or the batteries are on charge, there is no downside. The benefit is that all contacts are used, lights warm up, scanners revolve and the ship is kept alive. The heat from the bulbs alone will do the system a world of good.