This referred to the Mountjoy that broke the boom across the River Foyle during the Siege of Derry in 1689, providing historic symbolism for unionists. In Ulster, the UVF were given instructions for a full test-mobilisation. The UVF Motor Corps was summoned by the County Antrim commander, General Sir William Adair, and instructed as follows: This was all part of a "meticulous" and "elaborate" plan to ensure that the operation succeeded; only 12 people knew the full details and reason for the mobilisation of the UVF members. This was officially only a "test mobilisation". Captain F. Hall, the military secretary to the UVF recorded details of these plans in a memorandum. These included tapping of the private telephone line connecting Hollywood Barracks to Exchange, as well as the short-circuiting of phone and telegraph wires into Larne after the last train, and the "shorting" of the main rail lines. On the date of the landings, UVF members manned pickets and patrols along the length of the coast road between Belfast and Larne, as well as the roads leading to the towns of Ballyclare, Ballymena, and Glenarm amongst others. The men at these pickets were to give directions to any who needed them and were provided with reserve supplies of petrol and tools for repairing any vehicle that had problems. In Larne, UVF members wearing armlets stood "in line silent as soldiers on parade", and manned cordons that blocked the roads, preventing vehicles without a special permit from entering or departing Larne. Captain James Craig took command of the operations in Bangor, with Adair taking command in Larne. Sir George Richardson, overall commander of the UVF, remained in Belfast on the night of the landings and was kept fully informed of proceedings by dispatch-riders. Hoax and real landings On the date for the UVF Motor Corps "test" operation, a decoy ship, the tramp steamer SS Balmerino, was dispatched into Belfast Lough as a decoy to attract attention from authorities, to investigate it for smuggled armaments, in what the UVF leadership called the Hoax. In addition, the UVF arranged for a large truck to be waiting at the Belfast docks as if for an incoming load. The captain of the SS Balmerino ensured that by making his ship's approach as suspicious as possible, the authorities would be alerted. Once the ship was docked, the captain set about stalling the authorities for as long