SMS Helgoland


The second class of German dreadnoughts are, more or less, improved and enlarged versions of the preceding Nassau class. Armour protection and internal subdivision were enhanced, the main artillery calibre was upgraded from 28cm to the new 30,5cm standard, but otherwise nothing much changed. Originally, the four ships were supposed to be fitted with turbine engines, but since the respective engines were not ready in time, they were built with conventional triple expansion engines instead. These engines were more powerful than those on the Nassau class, so the top speed could be raised to 21 knots. The four new dreadnoughts, all named after German regions or states, entered fleet service in 1911 and 1912.

Ship data

Relative combat value: 22273

Basic damage control capacity: 96%


Displacement: 22440 tons

Length: 167 m

Width: 28 m

Draught: 9 m

Standard crew: 1284


Maximum speed (undamaged): 21 knots

Endurance: 13101 km

Coal capacity: 3150 tons

Armour protection

Conning tower armour: 12

Hull armour: 8

Main belt armour: 16.8 (includes backing slope of deck armour)

Deck armour: 2.4 (sloped at edges to provide additional belt level protection)

Best armour type: Krupp


12 x 30,5cm SK L/50 13.5, centrally controlled. Ammo: 1020 rounds

14 x 15cm SK L/45 20deg, centrally controlled. Ammo: 2100 rounds

12 x 8,8cm SK L/45, centrally controlled. Ammo: 2400 rounds

2 x 8,8cm Flak L/45, centrally controlled. Ammo: 400 rounds

6 x 50cm G7 Torpedoes, locally controlled. Ammo: 12 torpedoes

Ships in class

  • Helgoland
  • Ostfriesland
  • Thüringen
  • Oldenburg