From 1933 it was linked to the Navy, which it has been since, except the 1953-57 period when it was again under the Army. There is a red star in the upper hoist corner. The German navy flag book of 1939 has a note saying that the red star appears if the Inspector General is a Major-General, but that it is without the star if he is a Brigadier or Colonel. This is not noted in my Norwegian sources. The flag is no longer in use.
Red stars indicate the rank of the commander.
Commodore by Jan Oskar Engene Commodores have three stars, two set side by side on the top white panel and one set in the bottom white panel. Commander Senior Grade by Jan Oskar Engene A Commander Senior Grade has two stars set side by side in the upper white panel. Commander, Coastal Artillery Fortress by Jan Oskar Engene Commanders a single star in the top white panel. These pennants are still in use. In the inter-war period there was also a pennant for lower officers commanding mine units of the Coastal Artillery.