C4 1907
| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
| C1 | I31 | Vickers, Barrow | 03/1905 | 10.7.1906 | 11.1906 | sold 10.1920 | |
| C2 | I32 | Vickers, Barrow | 11.1905 | 10.7.1906 | 11.1906 | sold 10.1920 | |
| C3 | I33 | Vickers, Barrow | 11.1905 | 3.10.1906 | 2.1907 | expended 23.4.1918 | |
| C4 | I34 | Vickers, Barrow | 11/1905 | 18.10.1906 | 3/1907 | sold 4.1922 | |
| C5 | I35 | Vickers, Barrow | 11.1905 | 20.8.1906 | 4.1907 | sold 10.1919 | |
| C6 | I36 | Vickers, Barrow | 11.1905 | 20.8.1906 | 1.1907 | sold 11.1919 | |
| C7 | I37 | Vickers, Barrow | 12.1905 | 15.2.1907 | 5.1907 | sold 12.1919 | |
| C8 | I38 | Vickers, Barrow | 12.1905 | 15.2.1907 | 5.1907 | sold 10.1920 | |
| C9 | I39 | Vickers, Barrow | 1/1906 | 3.4.1907 | 6/1907 | sold 7.1922 | |
| C10 | I30 | Vickers, Barrow | 1/1906 | 15.4.1907 | 7/1907 | sold 7.1922 | |
| C11 | Vickers, Barrow | 4.1906 | 27.5.1907 | 9.1907 | collision 14.7.1909 | ||
| C12 | I42 | Vickers, Barrow | 11.1906 | 9.9.1907 | 1.1908 | sold 2.1920 | |
| C13 | I43 | Vickers, Barrow | 11.1906 | 9.11.1907 | 2.1908 | sold 2.1920 | |
| C14 | I44 | Vickers, Barrow | 12.1906 | 7.12.1907 | 3.1908 | sold 12.1921 | |
| C15 | I45 | Vickers, Barrow | 12/1906 | 21.1.1908 | 4/1908 | sold 2.1922 | |
| C16 | I46 | Vickers, Barrow | 12/1906 | 19.3.1908 | 6/1908 | sold 8.1922 | |
| C17 | I47 | Chatham DYd | 3.1907 | 13.8.1908 | 5.1909 | sold 11.1919 | |
| C18 | I48 | Chatham DYd | 3.1907 | 10.10.1908 | 7.1909 | sold 5.1921 | |
| C19 | I49 | Chatham DYd | 6.1908 | 20.3.1909 | 11.1909 | sold 2.1920 | |
| C20 | I50 | Chatham DYd | 6.1908 | 27.11.1909 | 1.1910 | sold 5.1921 | |
| C21 | I51 | Vickers, Barrow | 2.1908 | 26.9.1908 | 5.1909 | sold 12.1921 | |
| C22 | I52 | Vickers, Barrow | 2.1908 | 10.10.1908 | 5.1909 | sold 2.1920 | |
| C23 | I53 | Vickers, Barrow | 2.1908 | 26.11.1908 | 5.1909 | sold 12.1921 | |
| C24 | I54 | Vickers, Barrow | 2.1908 | 26.11.1908 | 5.1909 | sold 5.1921 | |
| C25 | I55 | Vickers, Barrow | 2.1908 | 10.3.1909 | 5.1909 | sold 12.1921 | |
| C26 | I56 | Vickers, Barrow | 2.1908 | 20.3.1909 | 5.1909 | scuttled 4.4.1918 | |
| C27 | I57 | Vickers, Barrow | 6.1908 | 22.4.1909 | 8.1909 | scuttled 4.4.1918 | |
| C28 | I58 | Vickers, Barrow | 3.1908 | 22.4.1909 | 8.1909 | sold 8.1921 | |
| C29 | I59 | Vickers, Barrow | 6.1908 | 19.6.1909 | 9.1909 | sunk 29.8.1915 | |
| C30 | I60 | Vickers, Barrow | 6.1908 | 19.7.1909 | 10.1909 | sold 8.1921 | |
| C31 | I61 | Vickers, Barrow | 1.1909 | 2.9.1909 | 11.1909 | sunk 4.1.1915 | |
| C32 | I62 | Vickers, Barrow | 1.1909 | 29.9.1909 | 11.1909 | stranded 24.10.1917 | |
| C33 | I63 | Chatham DYd | 3.1909 | 10.5.1910 | 8.1910 | sunk 4.8.1915 | |
| C34 | I64 | Chatham DYd | 3.1909 | 8.6.1910 | 9.1910 | sunk 21.7.1917 | |
| C35 | I65 | Vickers, Barrow | 3.1909 | 2.11.1909 | 2.1910 | scuttled 4.4.1918 | |
| C36 | I66 | Vickers, Barrow | 3.1909 | 30.11.1909 | 2.1910 | sold 6.1919 | |
| C37 | I67 | Vickers, Barrow | 4.1909 | 1.1.1910 | 3.1910 | sold 6.1919 | |
| C38 | I68 | Vickers, Barrow | 4.1909 | 10.2.1910 | 3.1910 | sold 6.1919 | |
| CC1 (RCN) | Seattle Co, USA | 1912 | 3.6.1913 | 8.1914 | sold 1925 | ||
| CC2 (RCN) | Seattle Co, USA | 1912 | 31.12.1913 | 8.1914 | sold 1925 |
|
Displacement standard, t |
|
|
Displacement normal, t |
C1 - 38: 287 - 290 / 316 - 320 CC1, 2: 313 / 373 |
|
Length, m |
C1 - 38: 43.3 CC1: 44.0 CC2: 48.0 |
|
Breadth, m |
C1 - 38: 4.12 CC1: 4.57 CC2: 4.26 |
|
Draught, m |
C1 - 38: 3.40 - 3.51 CC1, 2: 3.35 |
|
No of shafts |
1 |
|
Machinery |
1 16-cyl Vickers petrol engine / 1 electric motor |
|
Power, h. p. |
C1 - 38: 600 / 300 CC1: 600 / 240 CC2: 600 / 260 |
|
Max speed, kts |
C1 - 38: 13 / 7.5 CC1, 2: 13 / 10.2 |
|
Fuel, t |
petrol 16 |
| Endurance, nm(kts) | 740(12) / 10(7.5) |
|
Armament |
C1 - 38: 2 - 450 TT (bow, 4) CC1: 5 - 450 TT (4 bow, 1 stern, 5) CC2: 3 - 450 TT (2 bow, 1 stern, 3) |
|
Complement |
C1 - 38: 16 CC1, 2: 18 |
| Diving depth operational, m | 30 |
Project history: Having built three classes of submarines the Admiralty felt confident in embarking on a large production-run from 1906. In retrospect the decision to build 38 submarines to what was essentially a small coastal design was a mistake, for it delayed the introduction of proper overseas patrol submarines. The blame rests largely with Fisher, who saw submarines as useful for harbour defence, as a substitute for minefields. However, in spite of their petrol engines and the lack of space and endurance they saw continuous war service. Six were built by Chatham DYd to ensure the Royal Dockyards' ability to keep up with progress in submarine design. Appearance was similar to the 'B' class, but without the diving planes amidships. Some were camouflaged late in the war.
Modernizations: None.
Naval service: C1 was converted in 1918 to destroy the viaduct during the Zeebugge Raid, but was kept in reserve. C3 was nominally attached to 6th Flotilla for Zeebrugge Raid, 23 April 1918, when she was loaded with explosives to blow up the viaduct connecting the Mole to the shore. C11 was sunk in collision with s/s Eddystone off Cromer 14.7.1909. C14 and C17 were also sunk in collisions (with Hopper No 27 on 10 December 1913, and with destroyer Lurcher in May 1917 respectively), but both were raised and repaired. C26, C27 and C35 were sent on Detached Service to the Baltic from 1916, going out as deck cargo to Archangel, then by canal barge and rail to Lapvik on the Gulf of Finland. All were scuttled on 4 April 1918 off Helsingfors to avoid surrender to Germans. C32 was also sent to the Baltic in 1916; she was stranded and destroyed in Gulf of Riga. Ñ31 and Ñ33 were lost 4.1.1915 and 4.8.1915 for the unknown reasons, off Belgian coast and in the North Sea respectively. Ñ34 was torpedoed 21.7.1917 by German submarine U52 off North Ireland, Ñ29 was mined 29.8.1915 in the North Sea.
© Ivan Gogin, 2008-13