National Archives HW 13/38: German Naval Air Activity, Vol.XI, ZIP/947–1038 (Oct 1 1943–Dec 31 1943)
ZIP No. 959 for 13 October 1943 (Times BST)
NORTHERN AREA …
2. Security Patrol by 2.(F)/123 (Stavanger-Bergen)
Aircraft A and F were to operate from 0700–2010. Aircraft were not heard in W/T. Aircraft K however was heard 0841–0844
NOTE: 1 Bv 138 probably of 2.(F)/131 was rammed by a fighter in position RYVINGEN 330º 1.3. miles. Fighter sank in flames immediately. Unsuccessful attempts were made to salvage the Bv 138. The crew was lost.