The guns in the different batteries are usually of unknown origin. Some of the types are however described in the Weapons section.

See also the link to a site dedicated to the Norwegian coastal fortresses given in the Site info section.

Sorting under: 1. Sjöförsvarsdistrikt (Sea defence district)
Commander: oberst B. Eriksen
Full manning: 154 off, 1191 men
Actual manning (8^th April): 45 off, 293 men

Söndre Kaholmen
staff & liason
3 x 28cm gun Krupp
3 x AA mg

Håöya
2 x 12cm gun (not manned)

Kopås battery
3 x 15cm gun
2 x searchlight

Husvik battery
2 x 5.7cm gun

Nesset battery
3 x 5.7cm gun

Nordre Kaholmen
3 x 45cm torpedo tubes
2 x 5.7cm gun (not manned)

Seiersten
2 x 40mm Bofors AA

Unspecified locations:
2 x local defence companies (2 platoons present, from lvkp.3/I.R.6 and lvkp.2/I.R.4)
6 x AA mg (not manned)
4 x rangefinders (1 manned)
5 x searchlight (not manned)
1 controlled minefiled (not in position)

Sorting under: 1. Sjöförsvarsdistrikt (Sea defence district)
Commander: oberstlöytnant K. Notland
Full manning: 210 off, 1433 men
Actual manning (8^th April): 83 off, 613 men

Håøy fort
Command post
2 x 21cm gun
2 x 12cm gun (not manned)
4 x 6.5cm gun (not manned)
6 x AAmg (3 manned)
1 x 90cm searchlight
1 x searchlight (not manned)
1 x rangefinder
10 off, 90 men and 1 off, 15 men infantry

Måkerøy fort
2 x 30.5cm howitzers
2 x searchlight (not manned)
3 x AA mg (not manned)
10 off, 79 men

Bolærne fort
3 x 15cm gun
4 x 12cm gun
6 x AA mg
1 x 150cm searchlight (Garnholmen)
1 x 90cm searchlight (Ramsholmen)
1 x searchlight (not manned)
17 off, 148 men and 1 off, 20 men infantry

Rauøy fort
2 x 15cm gun
2 x 15cm gun
2 x 6.5cm gun (not manned)
2 x 40mm Bofors AA
9 x AA mg (6 manned) 
1 x 150cm searchlight
2 x 110cm searchlight (one on Misingen)
1 x searchlight (not manned)
23 off, 210 men and 1 off, 15 men infantry

Planned minefield between Rauöy and Bolaerne; 3 mine lines with a length of 7000 m

Infantry protection:
2 x local defence company (1 mobilized, from lvkp.2/I.R.4, with one platoon dispatched to Oscarsborg)

Sorting under: 1. Sjöförsvarsdistrikt (Sea defence district)
Commander: oberstlöytnant O. A. Fosby
Status: reserve since 1928 (no new personell) but still partly modernized
Manning: Full manning would be 148 off, 1250 men. 55 off, 385 men on duty on the 8^th of April.

Odderöya fort
staff & liason
2 x 21cm gun with concrete roof
4 x 24cm how with concrete roof (3 manned)
2 x 15cm gun
2 x 15cm gun
2 x 15cm gun
2 x 7.5cm AA gun (not manned)
4 x AA mg Colt
3 x 110cm searchlight
2 x 6.5cm gun (not manned)
25 off, 150 men

4 x 7.5cm fielgun (army local defence, not manned)

Gleodden battery
3 x 15cm gun
2 x 6.5cm gun (not manned)

Sorting under: 2. Sjöförsvarsdistrikt (Sea defence district)
Commander: oberst G.I. Willoch
Full manning: 221 off, 1738 men
Actual manning (8^th April): 79 off, 529 men

Kvarven
staff & liason
3 x 21cm gun
3 x 24cm how
2 x 110cm searchlight

2 x 7.5cm AA gun
6 x AA mg

3 x 45cm torpedo tubes (not manned) 

Hellen
3 x 21cm gun
3 x AA mg
1 x 110cm searchlight

Lerøy
2 x 6.5cm gun
90cm searchlight

Færøy
2 x 6.5cm gun
90cm searchlight

Herdla
2 x 6.5cm gun
110cm searchlight

Håøy
2 x 5.7cm gun
110cm searchlight

Sletta
2 x 7.5cm AA gun
2 x AA mg

Öyord
2 x 7.5cm AA gun
2 x AA mg

Sorting under: 2. Sjöförsvarsdistrikt (Sea defence district)
Commander: oberstlöytnant F. Jacobsen
Full manning: 159 off, 1318 men
Actual manning (8^th April): 48 off, 293 men

Hysnes
Staff and liason expedition
2 x 21cm gun
2 x 15cm gun
2 x 6.5cm gun (not manned)
1 x 110cm searchlight
3 x AAmg

Brettingen
2 x 21cm gun
3 x 15cm gun
2 x 6.5cm gun (not manned)
1 x 110cm searchlight
3 x AAmg

Hambåra
2 x 15cm gun (not manned)
3 x AA mg (not manned)
1 x 110cm searchlight (not manned)

Unspecified location
9 x AA mg (not mobilized)

Infantry protection
2 x local defence companies (not mobilized)

 Norway had a number of old border forts and fortresses at the Swedish border, built before and after the break-up of the union with Sweden i 1905. Many of the forts built before the break-up had to be disbanded as the border area was declared de-militarised zone in a treaty.

Sorting under: D.K.1 (District command)
Commander: major N.K. Arctander (64)
Status: reserve
Built in 1907-09. Defending the Glåma river line around Sarpsborg.

Greåker fort
2x12cm gun (turret) Schneider-Canet
2x7.5cm field gun m/01 (carried on trucks) 

Ravnebergets batteri
2x10.5cm gun L/28 (pivot guns on rail tracks)
4x7.5cm gun ???

Sorting under: D.K.1 (1st District Command)
Commander: OberstLt. L. Rodtwitt
Status: active
Built in 1912-18. Defending the approaches to the Askim area and the river crossings there. The fortress was also housing the barracks and magazines of the two motorized artillery battalions of the Norwegian army. These were situated at Høytorp fort.

Høytorp fort
Commander: major Th. Sødring
Staff and liason
2x12cm gun (turret) Schneider Canet
2x7.5cm gun (turret)
8x8.4cm pivot gun m/1887 (emplacements)
4x12cm howitzers (pit)
4x7.5cm field gun m/01 (carried on trucks)
4 luftv.mitr.tropp (AAMG plat.)

- officer school (for mot.art. 4 off, 40 men)
- guard detachment (9^th April: 2 off, 30 men)

equipment for approx. 2 to 3 battalions of infantry

Trøgstad fort
Commander: kaptein Fr. Stenersen
2x12cm gun (turret) Schneider Canet
2x7.5cm gun (turret)
8x8.4cm pivot gun (emplacements) Krupp m/1887
4x7.5cm field gun m/01 (carried on trucks)

- officer school (for position.artillery; 3 off, 40 men)

Motorized artillery (stationed at Høytorp fort)
8 x 12cm field howitzer m/32 (motorized)
12 x 10.5cm field gun (motorized)

 

Sorting under: D.K.2 (2nd District command)
Commander: major Einar Hoch-Nielsen
Status: reserve
The fortress had been in reserve status since 1926. In 1940 there were still about 200 men from earlier yers still in the lists. There were no defence plan for the fortress. The main artillery was removed during the winter 1939-40 and transported to Bergen, to reinforce the coastal fortress there. They were however still not emplaced in April 1940. Since 1939 the fortress had been a camp for German internee (6 officers, 6 NCO and 12 privates). A platoon of 30 men was set up as guards.

Gullbekkfortet
(2x12cm gun (turret) Schneider-Canet) Guns removed during the winter 39-40 and transported to Bergen for planned use as coastal artillery.

Vardefortet
(2x12cm gun (turret) Schneider-Canet) Guns removed during the winter 39-40 and transported to Bergen for planned use as coastal artillery.

Stored in magazines
12x8.4cm field gun Krupp m/1887 (with prepared positions)

Depots for two local defence companies of I.R.4

Hegra (Ingstadkleiva) fort
Sorting under: D.K.5 (5th District command)
Commander: none assigned but major Reidar Holterman took command
Status: inactive
The real name was Ingstadkleiva fort, but it was only known as Hegra during the war. Built in the years 1907-1910 to protect the main road from Sweden to Trondheim. Limited possibilities to fire in other directions. The guns were taken from an older fort in Örje. The fort was manned by an improvised force under major Holterman, and is famous because it was the last unit to surrender in southern Norway (5^th May 1940).