Logistics
Operation Sandcastle was divided into two sections, a sea voyage to Cairnryan and then a transfer to suitable hulks there for later sinking north-west of Ireland beyond the continental shelf. It was intended to process 16,000 bombs in the first attempt in mid-1955.
The work began with the construction of a road between Llandwrog and the nearby port of Fort Belan where six LCTs were assembled. Loading trials in June indicated only 400 bombs could be loaded on each craft, less than hoped. It was then decided to remove the tail-fins from the bombs to reduce their length, and to pack them in new boxes. This work increased each LCT's load to 800 bombs and by mid-July all 16,000 devices had been safely carried to Cairnryan.
Read more about this topic: Operation Sandcastle