OldWeather.org

OldWeather.org is a website that harnesses the power of "citizen science" to help digitize old nautical log entries.

Help scientists recover worldwide weather observations made by Royal Navy ships around the time of World War I. These transcriptions will contribute to climate model projections and improve a database of weather extremes. Historians will use your work to track past ship movements and the stories of the people on board.

http://www.oldweather.org/