Difference between revisions of "Indefatigable Class Battlecruiser (1909)"
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===Dreyer Table=== | ===Dreyer Table=== | ||
− | As of | + | As of 1918, the ''New Zealand'' and ''Australia'' carried Mark I Dreyer tables<ref>''Handbook of Capt. F.C. Dreyer's Fire Control Tables'', p. 3.</ref>. As to time of installation, one secondary source asserts that ''Indefatigable'' and ''New Zealand'' had Mark I tables at the [[Battle of Jutland]],<ref>Sumida, Jon. ''In Defence of Naval Supremacy'' p. 300.</ref> but no primary source confirms this. Moreover, a first-hand account seems to suggest a manual plotting board was being used in the T.S. of ''New Zealand''.<ref>Midshipman Gordon Eady quoted in Steel & Hart. ''Jutland 1916'', p. 75.</ref> |
The ships were never given Dreyer Turret Control Tables<ref>''Handbook of Capt. F.C. Dreyer's Fire Control Tables'', p. 3.</ref>. | The ships were never given Dreyer Turret Control Tables<ref>''Handbook of Capt. F.C. Dreyer's Fire Control Tables'', p. 3.</ref>. |
Revision as of 15:48, 24 August 2009
Fire Control
Rangefinders
Evershed Bearing Indicators
All 3 ships were likely fitted with this equipment at some point, but only Indefatigable is explicitly mentioned in Handbook for Fire Control Instruments, 1914[1].
The transmitting positions were
- Fore control platform (transmitters to port and starboard with a local switch to select one in use)
- 'A' turret
- 'X' turret
- Upper aft conning tower
The protocols for how her crew should handle wooding of the turrets was outlined in the Handbook for Fire Control Instruments, 1914[2].
Gunnery Control
The control arrangements were likely as follows[3].
Control Positions
- Fore top
- Main top[Inference]
- 'A' turret[Inference]
- 'Y' turret[Inference]
Some ships had C.O.S.s within the control positions so they could be connected to either TS[4].
Control Groups
The four 12-in turrets were separate groups, each with a local C.O.S.[Inference] so that it could be connected to
- Forward TS
- After TS
- Local control from officer's position within turret
Directors
Main Battery
The ships were fitted with a tripod-type director in a light aloft tower on the foremast along with a directing gun in the Y turret[5]. The battery was not divisible into for split director firing[6].
Secondary Battery
The 4-in broadside guns are not listed as ever having had directors installed[7].
Torpedo Control
Transmitting Stations
Like all large British ships of the era prior to King George V and Queen Mary, these ships had 2 TSs[8].
Dreyer Table
As of 1918, the New Zealand and Australia carried Mark I Dreyer tables[9]. As to time of installation, one secondary source asserts that Indefatigable and New Zealand had Mark I tables at the Battle of Jutland,[10] but no primary source confirms this. Moreover, a first-hand account seems to suggest a manual plotting board was being used in the T.S. of New Zealand.[11]
The ships were never given Dreyer Turret Control Tables[12].
Shipwide Network
The ships used Vickers F.T.P. Mark III range and deflection instruments to send data to gun sights, retaining Barr and Stroud (probably Mark II*[Inference]) instruments for other destinations[13].
Target Visible and Gun Ready signals mounted in the TSs and control positions indicated which turrets could see the target and which guns were ready[14].
See Also
Footnotes
- ↑ Handbook for Fire Control Instruments, 1914, pp. 33-9.
- ↑ Handbook for Fire Control Instruments, 1914, p. 36.
- ↑ Handbook for Fire Control Instruments, 1914, pp. 7-8. (some inferences drawn due to fundamental differences between this design and that of Orion to which it is likened).
- ↑ Handbook for Fire Control Instruments, 1914, p. 7.
- ↑ The Director Firing Handbook, 1917. pp. 88, 142.
- ↑ The Director Firing Handbook, 1917. p. 88.
- ↑ The Director Firing Handbook, 1917. pp. 143.
- ↑ Handbook for Fire Control Instruments, 1914, pp. 6-7.
- ↑ Handbook of Capt. F.C. Dreyer's Fire Control Tables, p. 3.
- ↑ Sumida, Jon. In Defence of Naval Supremacy p. 300.
- ↑ Midshipman Gordon Eady quoted in Steel & Hart. Jutland 1916, p. 75.
- ↑ Handbook of Capt. F.C. Dreyer's Fire Control Tables, p. 3.
- ↑ Handbook for Fire Control Instruments, 1914, pp. 72.
- ↑ Handbook for Fire Control Instruments, 1914, p. 11.
Bibliography
Template:BibUKDirectorFiringHandbook1917 Template:BibUKDreyerTableHandbook1918 Template:BibSumidaIDNS Template:BibBrooksDreadnoughtGunnery Template:BibRobertsBattlecruisers