Thoma-Sea Boatbuilders Inc., Houma, La., launched the first of two new 150-ft. offshore supply vessels (OSVs) it is building for Massie Towing of Houma. The vessels were designed by Frank Basil of Intech & Associates, also of Houma. The first vessel, M1, entered service in mid-June, and the second vessel is scheduled to launch in December 2000. Massie will operate both vessels in the Gulf of Mexico. Propulsion power for the two new OSVs comes from twin Cat 3508EUI marine engines, each rated 905 bhp (675 bkW) at 1,600 rpm. The electronic unit injected 3508s drive Bird Johnson 72 x 59 in. propellers through Twin Disc 5:1 gears, providing a service speed of 14 knots.
