The Marinens Flyvebaatfabrikk M.F.11 (or Høver M.F.11, for its designer) was a three-seat, single-engine biplane used by the Royal Norwegian Navy Air Service for maritime reconnaissance in the decade before the Second World War.

[1] The pilots wanted a monoplane, but as the RNoNAS demanded that it have a maximum wingspan of 15.4 m (51 ft), to fit into existing hangars, a biplane configuration was thought necessary.

Its first flight was on 29 September 1931,[1] equipped with the British Armstrong Siddeley Panther II radial engine, the first 14 of which were made in the United Kingdom.

After the outbreak of the Second World War in 1939, this included military exercises, searching for mines and missing ships, while being stationed at coastal fortifications to provide reconnaissance flights.

[1] Shortly before the war the Royal Norwegian Navy Air Service decided on a replacement for the M.F.11, and 24 Northrop N-3PBs were ordered in March 1940 from the US but none arrived before the Germans invaded.

An M.F.11 was among the first Norwegian units to make contact with the invasion forces when on 8 April 1940 an aircraft of the Trøndelag Naval District was dispatched to the Kornstadfjord near Lyngstad in Eide where a German Arado Ar 196 had made an emergency landing.

After the German aircrew approached locals trying to purchase fuel they were captured by some civilians before being transferred to the custody of police officers.

The first 700 Naval Air Squadron Walrus was released by Norwegian authorities after having been interned in Kristiansund on 8 April after failing to return to the battleship HMS Rodney.

[10] Escape to the UK – On 17 April, the RNoN Commander decided that the four aircraft would be evacuated as fuel reserves for only five to six hours flying time remained.

[3] During the autumn of 1941, the aircraft carried out around 20 reconnaissance and propaganda missions in the Lake Ladoga area before ice conditions ended flying and they were put into winter storage.

[3] During the summers of 1943 and 1944, similar types of missions were flown over the Baltic but, at least in part due to an anti-submarine net having been positioned across the Gulf of Finland, no submarines were spotted.

Following the Moscow Armistice on 4 September 1944, the M.F.11s were sent to Detachment Jauri[15] in the far north of Finland to participate in the Lapland War,[14] flying roughly 60 transport missions in October.