It has been considered that the availability of fossil fuels is getting rare and hence becoming moreudexpensive. Its exploration has moved from onshore to offshore together with advanced technology involved thusudcausing higher cost to the fuels to be ready to use. This fact has caused (in particulars) the fishermen cannot afford toudbuy the fuel so that they are vulnerable to live in poverty. Recent survey shows that more than 50% of fishing boats,udowned by traditional and low economic income of Indonesian fishermen, has been grounded. In addition, the use ofudfossil fuels has caused the increase of green house gas (GHG) effects thus its continuous use is not environmentallyudfriendly. The current paper describes the development of catamaran fishing vessel as a part of academic contribution toudhelp the Indonesian fishermen. Earlier work proposed the design of catamaran fishing (cat-fish) vessel using theudconventional diesel engine, whilst the new design introduces the use of combination of diesel engine together with theuduse of solar power. Discussion includes the explanation of lay out arrangement, ship stability and seakeepingudcharacteristics, and energy index due to the use of two power system. The later item has now become a serious matterudunder IMO (International Maritime Organization) regulation in order to reduce GHG effect. Economic review of theudpossible development of the novel concept is also taken into consideration because the investment cost of the solarudpowered boat is predicted to be more expensive than the diesel powered vessel but its operational cost is cheaper henceudit is promising in long-term use.
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