A fleet anchorage needs a railway behind it

The comparison with Invergordon explains the difference between a forward anchorage and a sustainable fleet base. Parts, stores, coal, oil, and repair facilities can move rapidly along a railway, while Scapa often required a ship-train-ship chain. Jellicoe's need for special coal trains and the Fifth Battle Squadron's oil demand show how fleet scale magnified every weak transport link. Welsh coal was preferred for the fleet, while Scottish coal served power stations, so proximity to Scottish mines did not remove the problem. Regular whaling calls also failed to create a supply system useful to the wider fleet. A modern base at Scapa would need much more than a pier or ferry service; it would require major transport infrastructure across northern Scotland and the islands.