Abstract: Offshore fishing is one of the strategies for developing marine economy in our country in particular and in the world in general. For ships that go out fishing, eating and drinking are ones of the important factors that help decrease the costs and increase the yield. During the sailing process, fresh water is usually brought by fishing boats from the mainland. This increases the load of the vessel, increases the costs and limits the amount of water used. This article presents the design and manufacture of a system that filters seawater into fresh water using solar energy with a capacity of 10 liters/hour to help fishermen take the initiative in water resources to reduce the load on fishing vessels and reduce the initial costs. The research results are the basis for calculating the design of water purification systems in general and applying them to actual production.

Keywords: Offshore fishing, water purification system, seawater purification into fresh water, solar battery.