From the Luftwaffe Colours book "Seeflieger - Luftwaffe Maritime Aircraft and Units - 1935-1945"...
".....As a result, the formation of Fleigerführer Ostsee² on 1 April 1941 brought for the first time the Luftwaffe's own maritime air unit, Aufklärungsgruppe 125 (See)³ to the forefront of operations...."