Andy Martin of AMT Marine will take delivery this May of a 136 x 34 x 12-ft. mini-supply boat from Hope Services of Dulac, La. The new boat, designed by Frank Basil's Entech and Associates of Houma, will be powered by a pair of Cummins V-12 KTA38 M0 main engines rated for 850 hp each at 1,800 rpm and driving through Twin Disc MG5301 gears with a ratio of 5.96:1. It's what this combination is driving that makes the story. On the end of each stainless steel six-in. shaft will be mounted a 66 x 54-in. five-blade prop from Padgett-Swan. Computer modelling has shown a gain of up to 1.5 knots with this combination and the five-blade props over four-blade props. Given the new boat's cargo capacities ? approximately 95,000 gallons of water and 90,000 of fuel ?