Are you sure they were German? From the below it appears the attacks were carried out jointly by German and Italian Ju 87.
Quote:
Dt. Ju 87 der III./StG.1 und II./StG.2 und ital. Ju 87 der 96. und 236. Sq. versenken [...] am 18.4. nordwestlich von Sidi Barani die bewaffnete Yacht Fiona (2190 BRT).
|
http://www.wlb-stuttgart.de/seekrieg/41-04.htm
All the best
Andreas