NAVYPEDIA

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
З.1 [Z.1]			Baltic Wks, St. Petersburg	1917	---	---	suspended 1918
З.2 [Z.2]			Baltic Wks, St. Petersburg	1917	---	---	suspended 1918
З.3 [Z.3]			Russo-Baltic Wks, Revel	1917	---	---	suspended 1918
З.4 [Z.4]			Russo-Baltic Wks, Revel	1917	---	---	suspended 1918

Technical data

Displacement standard, t
Displacement normal, t	Z.1, 2: 230 / 275 Z.3, 4: 229 / 264
Length, m
Breadth, m
Draught, m
No of shafts	2
Machinery	2 diesels / 2 electric motors
Power, h. p.
Max speed, kts	10 / 5
Fuel, t	diesel oil
Endurance, nm(kts)	2000 / 90
Armament	Z.1, 2: 20 mines Z.3, 4: 16 mines
Complement	50
Diving depth operational, m	45

Project history

Part of the 1916 Submarine Programme, designated for the Baltic Fleet. Ordered 1917 but construction abandoned after the Bolshevik Revolution.