The triple 16" mount turret proved itself when, in October 1929, a turret crew with two years experience loaded and fired 33 consecutive rounds without mishap. The incorporation of many safety features, achieved with lighter materials, meant that the complex and relatively fragile equipment had to be serviced regularly over the ships' lifetime. These ships were fitted with the HACS AA fire control system and the Admiralty Fire Control Table Mk I for surface fire control of the main armament.
However, the blast of the guns disrupted some officers on the bridge to such an extent that the guns of 'X' turret were usually prohibited from firing abaft of the beam at high elevations of 40 degrees during peacetime practice firing. Fitting tempered glass in the bridge windows was tried, but gun blast shattered some of them and filled the bridge with flying debris.
A great deal of effort was expended in correcting this problem, and fitting of protective ledges below the bridge windows proved successful. Blast was also a problem elsewhere; D.K. Brown tells of a test firing that was suspended when DNC observer H.S. Pengelly, who was beneath the foredeck, reported a bright red flash after firing all guns in 'A' turret. This was later discovered to be caused by concussion of the observers' eyeballs.
Quo Fata Vocant-Whither the Fates call