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| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate | 
|---|---|---|---|---|---|---|---|
| Нарвал [Narval] | Nevsky Wks, St. Petersburg // Nikolayev | 12/1911 | 24.4.1915 | 9/1915 | captured by Germany 1.5.1918 (US5) | ||
| Кит [Kit] | Nevsky Wks, St. Petersburg // Nikolayev | 12/1911 | 5/1915 | 10/1915 | captured by Germany 1.5.1918 (US7) | ||
| Кашалот [Kashalot] | Nevsky Wks, St. Petersburg // Nikolayev | 12/1911 | 4.9.1915 | 5/1916 | captured by Germany 1.5.1918 | 
| Displacement standard, t | 
  | 
                                                            
                                                                                                                
                                                
                
|---|---|
| Displacement normal, t | 620 - 621 / 990 - 994  | 
                                                            
                                                                                                                
                                                
                
| Length, m | 70.2  | 
                                                            
                                                                                                                
                                                
                
| Breadth, m | 6.50  | 
                                                            
                                                                                                                
                                                
                
| Draught, m | 3.60 | 
| No of shafts | 2  | 
                                                            
                                                                                                                
                                                
                
| Machinery | 4 diesels / 2 electric motors  | 
                                                            
                                                                                                                
                                                
                
| Power, h. p. | 640 / 490  | 
                                                            
                                                                                                                
                                                
                
| Max speed, kts | Narval: 11.5 / 6 Kit, Kashalot: 10.8 / 5  | 
                                                            
                                                                                                                
                                                
                
| Fuel, t | diesel oil  | 
                                                            
                                                                                                                
                                                
                
| Endurance, nm(kts) | 3500(6.5) / 103(4.2) | 
| Armament | Narval: 2 x 1 - 75/48 Canet, 12 - 450 TT (2 bow, 2 stern, 8 Drzewiecki drop-collars) Kit, Kashalot: 1 x 1 - 75/48 Canet, 1 x 1 - 57/40 Hotchkiss, 12 - 450 TT (2 bow, 2 stern, 8 Drzewiecki drop-collars)  | 
                                                            
                                                                                                                
                                                
                
| Complement | 41 | 
| Diving depth operational, m | 50  | 
                                                            
                                                                                
            
                            Part of the 1911 Programme, designated for the Black Sea Fleet. Holland design (Type 31A), double hull type, diving limit 100m, diving time 1 minute. Unlike contemporary Russian submarines these were fitted with a crush diving tank, gravitionally filled ballast tanks and watertight bulkheads built in. Undoubtedly the best submarine type ever built for the Imperial Russian Navy. The original design provided 2 diesels 850bhp each and 16kts surface speed but these were not fitted because of the notorious shortage of diesels.
1916, Kashalot; 1917,  Narval: - 8 - 450 TT (Drzewiecki); + 4 - 450 TT (Drzewiecki-Podgorny)
1917, Kit: - 1 x 1 - 57/40, 8 - 450 TT (Drzewiecki); + 1 x 1 - 75/48 Canet, 4 - 450 TT (Drzewiecki-Podgorny)
Kit and Narval were captured 1.5.1918 by the Germans together with Kashalot and surrendered to the Allies in November 1918. Scuttled off Sevastopol to prevent capture by the advancing Reds.

