Apărarea Fixă Maritimă (The Maritime Settled Defence):

Formed 11.3.1920, assigned to Divizia de Mare, with the following structure:

• Statiunea SULINA (The SULINA Station):
  1 Grup Apărarea Sub Apă / Mine-Dragaj (1 Underwater Defence Group);
  1 Cp. Infanterie şi observare (1 Infantry and Observation Company);
  1 Plt. Trs. (1 Signal Platoon);
  1 Sct. Tunuri (1 Guns Sections: 1 of 152 mm and 1 of 120 mm)
• Statiunea LIMAN (The LIMAN Station):
  1 Grup Apărare Sub Apă / Mine-Dragaj (1 Underwater Defence Group);
  1 Cp. Infanterie şi observare (1 Infantry and Observation Company);
  1 Plt. Trs. (1 Signal Platoon);
  1 Btr. Tunuri 75 mm (1 75 mm Guns Battery);
  1 Sct. Tunuri (1 Guns Section: 1 of 152 mm and 1 of 120 mm).

Apărarea Fixă Fluvială (The Fluvial Settled Defence):

Formed 11.3.1920, assigned to Divizia de Dunăre, with the following structure:

1 Grup Apărarea Sub Apă / Mine-Dragaj (1 Underwater Defence Group);
1 Cp. Infanterie şi observare (1 Infantry and Observation Company);
1 Plt. Trs. (1 Signal Platoon);
1 Sct. Plutitoare Tunuri 152 mm (1 Floating 152 mm Guns Section);
1 Sct. Tunuri 75 mm (1 75 mm Guns Section).