UB57 UB109 DRAEGER BREATHING APPARAT

[geosub1978]

Hello!

I am looking to find out if the crew of UB109 used Draeger escape apparatus during the escape of 9 personnel after sinking on 29 August 1918 in the straights of Dover. Also if the UB57 had any survivors which sunk at the same place on 14 August 1918. Does anyone know if this information exists?

Thank you!
George