. . . . . . . . . "boom defence vessels" . . . . . . . . . . . . . . . "boom defence ship" . "net tenders" . . . . "Net Layer Tug" . . . "net layer" . . . "net laying" . . . . . "Net-defence ship" . . . "Anti-submarine net tender" . . . . "net laying ship" . "boom defence ship (BDS)" . . "Net laying ship" . . . "netlayers" . . . . "Net laying ship" . . . . . . . . . . . . . . . . . . "Net tender" . "boom defense" . . . . . . . . . . . . . . . . . . . . "boom defense vessels" . . . . . . . . . . "net-laying ships" . "auxiliary netlayer" . "AN" . "boom defence" . . . . . "Boom defence vessel" . . . . "Net Laying Ship" . . . . . . . . . . . "netlayer" . "boom gate vessel" . . . "Boom defence vessels" . . . . "Net Lying" . "net tender" . . "boom defence vessel" . . .