Finding a fugitive capital ship through fuel logistics

If Hood could not be found after two weeks, how should the Royal Navy search?

It should track the limited ports and fuel supplies capable of supporting a ship as large as Hood.

The fanciful pursuit scenario becomes a logistics problem rather than an unrestricted search of the oceans. Few ports could both berth Hood and supply the volume of fuel needed to move such a large ship, so the Royal Navy should trace suitable facilities and fuel movements. Iceland is offered as a plausible hiding place because it could support the ship without drawing immediate suspicion. Its fishing and merchant fleet also provided a pool of people accustomed to operating ships, which makes the crew requirement less implausible within the scenario.