are fitted with two diesel motors driving two Voith Schneider Propellers; these cycloidal propellers eliminate the need for the aft two active rudders. The ships use a Raytheon/Thomson Sintra SQQ-32 VDS sonar for minehunting, and Alliant SLQ-48 remote vehicles for mine disposal. The ships normally carry a crew of 51, including four officers, and are armed with two machine guns. Upon entering service, the twelve ships were assigned to the United States Atlantic Fleet, with the intention that they remain in service for approximately twelve months before being transferred to the United States Navy Reserve. However, all of the ships remained in service until decommissioning in 2006 and 2007. The class was replaced in service by the s, and as of 2008, eight Ospreys had either been transferred to or marked for transfer to other navies: two each to the Hellenic Navy, Lithuanian Navy, Turkish Navy, and Republic of China (Taiwan) Navy. Huon class In 1991, a force structure review saw the need to replace the inshore minehunters. The operating capabilities of the Bay class were found to be severely lacking, with four of the six ships cancelled before construction started. In 1994, a contract was awarded to Australian Defence Industries (ADI) to construct six minehunters based on the Gaeta subclass. The construction was to be a joint venture with Intermarine. The hull of the first ship, was constructed by the Intermarine shipyard in Sarzana, Italy, then was sent to Australia in 1995 for fitting out at ADI's shipyard in Newcastle, New South Wales. ADI constructed the other five ships in the class, which were all named after Australian rivers. The Australian ships, which are referred to as the , have a slightly greater displacement and draft than the Gaetas. The ships use a GEC-Marconi Type 2093 sonar, two SUTEC Double Eagle remote mine disposal vehicles, and are armed with a 30 mm DC30B gun. The ships have a crew of 36 (including 6 officers), with further accommodation for 13 more, including 6 divers. The class entered service between 1998 and 2002 and is based at in Sydney. Lat Ya class Eight minehunters based on the Gaeta class were ordered by the Royal Thai Navy on 19 September 1996, after Intermarine won the tendering process initiated in April that year. Built at Intermarine's Sarzana shipyard, the first two ships of this class (HTM Ships and were laid down in 1998