Ness Battery: Single Heinkel 111 approaches from E, 800ft over Battery. Ness Battery's 5 Bren guns open fire. No hits.
Flotta - Stanger Battery's Brens open fire on low flying aircraft, which fire back. No casualties.
At least 2 waves of bombers turn away when faced with HAA barrage fire and fighters, but ~20 press on and ~15 250kg and 500kg bombs dropped, mostly on Flotta. Luftwaffe targeting the Hoxa and Switha booms again. Buchanan Battery hit - no casualties.
Ness Battery: 2nd plane low over huts. Brens open fire. Plane 'disappeared over Black Craig, swerving violently'. Ness Battery makes tentative claim as a 'kill' - thought unlikely to have made it back to base.
HMS SUFFOLK hit during air raid on Scapa Flow - but not badly damaged. SUFFOLK took part in occupation of Faeroe Islands three days later and sank German tanker "Skagerrak" off Norway on 14th.
During the raids two AA gunners killed in explosion at gun site in S Ronaldsay ('R3' manned 178 HAA Bty at Herston). Gnr Thomas COCKBURN & Gnr Alfred SAYERS, both aged 39, buried at St Peter's, South Ronaldsay. OSDef CO Brig. Kemp at funeral on 13 April 1940.