. "1954-06-22" . "HNLMS Onverschrokken (M886)" . "25.928" . . "Museum ship" . "HNLMS ''Mercuur''" . . . . . . "HNLMS Mercuur" . "1973-03-01" . "HNLMS Onverschrokken (M886)" . "1953-07-22" . "HNLMS ''Onverschrokken''" . . . "10.7" . . "1973-05-11" . "1952-02-16" . . "1953-02-17" . . . "1987-02-12" . . . . "53.0" . .