Built in Bremerhaven Germany in 1965
1967 R/N Danasbank
1970 R/N Dortmund
1974 R/N Vickers Viking
1982 R/N Swanella
1984 R/N Sir Walter Raleigh
1988 R/N Sir Tristan
1990 R/N Trinity Explorer
1991 R/N Marine Explorer
2005 R/N Marine Ex