This theory was based on the assumption that Great Britain would have to send its fleet into the German Bight for a close blockade of the ports (blockading Germany was the only way that the Royal Navy could seriously harm Germany), where the German Navy could force a battle. However, due to Germany's geographic location, Great Britain could employ a distant blockade by closing the entrance to the North Sea in the English Channel and the area between Bergen and the Shetland Islands. Faced with this option a German Admiral commented, "If the British do that, the role of our navy will be a sad one," correctly predicting the role the surface fleet would have during the First World War.