A fully waterproof encpasulated quick reference guide to weather. A useful guide with lots of good information. The waterproof format makes in ideal for cockpit use in all weathers. You should start to recognize the early signs of an approaching front. Know what the sky, clouds, wind, and barometer are telling you. Anicipate squalls, fog, windshifts, and thunderstorms. Adapt forecasts to the location of your boat.