Editing Bellerophon-class battleship (section)

===Fire control===
[[File:1913 Canadian $10 bill-obverse.jpg|thumb|The ''Bellerophon'' class on the [[obverse]] of the [[Canadian ten-dollar note|Canadian $10 bill]], 1913]] 
''Dreadnought''{{'}}s [[tripod mast|tripod foremast]] was positioned behind the forward [[funnel (ship)|funnel]] to allow the vertical leg to serve as a support for the boat-handling [[derrick]]. This meant that the hot funnel gases could render the [[Top (sailing ship)|spotting top]] uninhabitable in conditions of little or no wind. The ''Bellerophon''s had the foremast moved forward of the funnels to reduce the problem in the spotting top and a second tripod mast was added to handle the derrick, but it had to be positioned in front of the aft funnel to do that, which rendered the aft spotting top almost useless as it could be exposed to the exhaust plumes from both funnels under certain circumstances.<ref>Brooks 1995, pp. 41–42</ref>

The control positions for the main armament were located in the spotting tops at the head of the fore and [[mainmast]]s. Data from a {{convert|9|ft|m|adj=on|1}} [[Barr and Stroud]] [[coincidence rangefinder]] located at each control position was input into a [[Dumaresq]] mechanical computer and electrically transmitted to [[Vickers range clock]]s located in the transmitting station located beneath each position on the main deck, where it was converted into range and [[Deflection (ballistics)|deflection]] data for use by the guns. The target's data was also graphically recorded on a plotting table to assist the gunnery officer in predicting the movement of the target. The turrets, transmitting stations, and control positions could be connected in almost any combination.<ref>Brooks 1995, pp. 40–41</ref> As a backup, 'A' and 'Y' turrets in each ship could take over if necessary.<ref>Brooks 2005, p. 61</ref>

An experimental [[fire-control director]] was fitted in the forward spotting top and evaluated in May 1910. This electrically provided data to the turrets via pointers, which the turret crew were to follow. The director layer fired the guns simultaneously which aided in spotting the shell splashes and minimised the effects of the [[ship motions|roll]] on the dispersion of the shells.<ref>Brooks 2005, p. 48</ref> The director was subsequently removed, but ''Superb'' had a production model installed by May 1915 and both ''Temeraire'' and ''Bellerophon'' received theirs by May 1916.<ref>Brooks 1996, p. 168</ref> The latter's director, however, was not fully installed by the date of the Battle of Jutland at the end of the month and she fought without it.<ref name=dread>{{cite web|title=H.M.S. Bellerophon (1907)|url=http://www.dreadnoughtproject.org/tfs/index.php/H.M.S._Bellerophon_(1907)|publisher=The Dreadnought Project|access-date=17 February 2017|language=en}}</ref> Furthermore, they were fitted with Mark I [[Frederic Charles Dreyer#Dreyer Fire Control Table|Dreyer Fire-control Table]]s by early 1916 in the transmission stations. It combined the functions of the Dumaresq and the range clock.<ref>Brooks 2005, pp. 157–158, 175</ref>