ww1 blockships and ww2 churchill barriers (causeway) used to protect the scapa flow anchorage on orkney, scotland

anchor barrier beach blockship blockships burray causeway churchill cloud coast coastline diving europe farm farmland german graemsay great britain hoy island isle landmark landscape mainland naval naval base ocean orkney orkney islands outdoors scenic scotland scottish scuttled scuttling fleet sea ship ships shore south ronaldsay sunk sunken uk viking water world war war ww1 ww2