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Re: Custom Built On-board PC / Boatputer Advice
One of the more important aspects for any computer on board, especially for long distance sailing is to consider 'marinizing' (potting, etc.) all the internals of the computer. Marinizing 'seals' all the internal components against salt and humidity/internal condensation.
With long distance sailing, you'll soon find out that the microscopic airborne salt crystals will penetrate 'everything', including your computer. Even if 'marinized', its a good idea to either keep the computer 'always on' or sealed in a plastic bag to prevent the micro-salt intrusion, especially when your crossing a weather front which can bring severe and sudden humidity changes inside a boat (condensation inside .... everything).