Gotov McDermut Kittery Shipyards Monssen Camelion Mervine launched Hiltebrant Yard Dockyard Sevmash Bernadou keel Araner Werft Keosanqua YMS Martinac Kewaydin ACV designated Ambridge GRSE Blessman Cabrilla Sederstrom BYMS Manitowoc DLGN BDE commissioned Originally Hilp DLG Wigham Drydock