Rear Admiral Knut Mauritz "Moje" Östberg (9 September 1897 – 13 November 1984) was a Swedish Navy officer.

[2] He realized early on the necessity of modernizing the artillery fire control in order to take advantage of the tremendous development of firepower and range.

[2] Östberg was promoted to lieutenant commander in 1941[1] and served as captain of the coastal defence ship HSwMS Manligheten from 1941 to 1942.

[3] During the years 1942–1944, he was posted as a naval attaché in Berlin and experienced the devastating bombings that the Allies deployed.

[1] Östberg never ceased during his long time as an old age pensioner to follow daily events in and around the Swedish Navy.

He was badly affected by the abolition of heavy and medium-heavy artillery and the decommissioning of the coastal defence ships, cruisers and destroyers.

The idea that one could not even prevent the entry and behavior of foreign submarines in the navy bases in Hårsfjärden and in Karlskrona tormented and made him depressed.