Älvsborg Fortress, started in 1899 and completed in modern condition in 1907, was placed in a materiel reserve in 1926.

The corps was disbanded in 1926 and from 1 November 1926 until 1939, Gothenburg's coastal artillery consisted only of a small division from KA 2 in Karlskrona, which had the task of keeping the powder dry and rust away from the guns and mines at Älvsborg Fortress.

In the face of the threatening foreign policy situation, the fortress was placed in a state of defence in the autumn of 1939.

By then, the line of defence had already begun to be moved from the estuary to the outer islands of Gothenburg archipelago.

In 1981, the barracks battery in Baskompaniet ("Base Company"), and the instructor school ceased and the Swedish Navy Officer College in Gothenburg (Marinens officershögskola i Göteborg, MOHS G) was added.

In connection with the Defence Act of 1996, the 5th Coastal Artillery Brigade was removed from the war organization on 31 December 1997.

Later, the school also came to train students in general educational subjects from other branches of Swedish Armed Forces.

[9][8] The Swedish Navy Officer College in Gothenburg (Marinens officershögskola i Göteborg, MOHS G) operated at KA 4 from 1981 to 1984, after which the school was amalgamated into the Swedish Navy Officer College in Karlskrona (Marinens officershögskola i Karlskrona, MOHS K), which adopted the name Swedish Navy Officer College (Marinens officershögskola, MOHS).

Initially, the school's training was located in Hjuvik, but was relocated to Säve in 1969, after Göta Wing (F 9) was disbanded the same year.

[10] Blazon: "Azure, the regimental badge, three waves bendy-sinister argent, charged with a double-tailed crowned lion rampant or, armed and langued gules, in dexter forepaw a sword or and in sinister a shield azure charged with three open crowns or placed two and one.

The shield surmounted two gunbarrels of older pattern in saltire above a flaming grenade and waves".

The colour is drawn by Vladimir Sagerlund and embroidered by machine in appliqué technique by Engelbrektssons Flag factory.

[13] Blazon: "On red cloth in the centre the badge of the Swedish Coastal Artillery; two gunbarrels of older pattern in saltire between a royal crown proper and a blazing grenade and waves, all in yellow.