Isle of Man Steam Packet Company England, Wales, Scotland and Ireland. Ports served included Liverpool, Silloth, Whitehaven, Holyhead, Ardrossan, Blackpool, Belfast and Dublin. Vessels and crews of the company were actively involved in both the First and Second World Wars. One vessel, , was attached to the British Grand Fleet and led the German High Seas Fleet into Scapa Flow in the Orkney Islands at the end of the First World War. Another vessel, "Viking", was converted to become a seaplane carrier, serving as . During the First World War, eleven out of a total fleet of fifteen Steam Packet ships were requisitioned by the Admiralty.
Fleet in being Vladivostok on 10 August 1904. Vitgeft's exit from Port Arthur resulted in the Battle of the Yellow Sea, an excessively long-ranged gun duel that resulted in no capital warships being sunk on either side, but finally eliminated Port Arthur's "fleet in being", as its warships became dispersed to neutral ports (where they were interned), and the survivors were so heavily damaged that they were no longer serviceable. A later example is the stand-off between the German High Seas Fleet and the British Grand Fleet during World War I. Germany largely preferred to keep its fleet intact rather than taking the