4- For several years already, the manufacturers of electronic devices have used liquid crystal display. Most of the time, these screens are the most expensive component of electronic devices. If your device spends winter in the cold, the liquid contained inside the screen could freeze. If this happens, your screen could crack and become unusable. It is best to think about it before...
5- The long-duration cycle batteries or marine batteries must be removed from the boat to avoid a complete run-down, what would damage the cells. A flat battery can freeze and crack. It is very important to recharge these batteries at least once per quarter, during the cold season. Even the small batteries for portable sonars must be recharged to optimize their efficiency. You can store a battery directly on the cement without any problems, provided that the immediate environment is dry and warm. On the other hand, on some cold cement, there is a lot of humidity and it will drain the energy from the battery. It is then necessary to put a piece of wood under the battery, as an insulator.
6- The electric engine and the electric downriggers should be stored in the dry throughout winter. This will prevent from having problems of corrosion caused by humidity even if these tools are perfectly sealed. Take this opportunity to check the condition of your propeller as well as the wire rope and the fasteners.
7- The receiving antenna of the GPS can remain on board. Just make sure that it is disconnected.
8- VHF radios are usually devices that are not perfectly sealed. Even some are not quite sealed. It is thus imperative to remove them from the boat if you wish to reuse them again, the following season.
9- The integrated battery charger is a device which is generally well protected from humidity. However, you must make sure it is fed by no electrical source and that it spends winter in a dry and ventilated place.
10- The wells and the bilge pumps should be disconnected and completely drained. That way these devices will not break from ice forming and its expansion.
Several boat dealers as well as certain marinas offer packaging services for winter. Thanks to a plastic shrinking seal, it covers your boat to protect it from bad weather in winter. Make sure there is a certain ventilation to avoid the greenhouse effect and that no rodents can take up residence inside your boat.