For the first-of-class, Block A was assembled at Govan and moved to Scotstoun, where it was mated to Block B/C, which was already fitted with the WR-21 turbines and machinery. Block D, also assembled at Scotstoun, was fitted to these three blocks. The bow sections (E/F) were mated at Portsmouth and taken by barge to Scotstoun. These were the final blocks to be attached. At this point the hull was launched into the Clyde and towed to the Scotstoun Dry Dock where the masts and funnels were fitted (the masts are partially outfitted with equipment, for example the mast for the S1850M radar is sent from Portsmouth to Thales Nederland to be fitted with radar equipment). Once this is complete, the remaining equipment is fitted: radar arrays, bow-mounted sonar, propellers, missile equipment and 4.5-inch gun.