On 29 October the Royal Dutch Submarine HNLMS Walrus was photographed pier side at Naval Station Norfolk after eight days of training with U.S. and Dutch naval assets taking part in TACDEVEX 08-08. The exercise off Cape Cod included realistic undersea weapons and tactics training for both the Dutch and American submarine crews. The four Dutch Walrus -class submarines entered service in the early 1990s, several years before the advent of true air-independent propulsion capable submarines, however, they remain advanced, quiet, and modern by diesel submarine standards. The Walrus and her sisters— Zeeleeuw , Dolfijn , and Bruinvis —each displace 2,800 tons submerged and sail with a complement of around 50 sailors and officers.