Enigma: 10th problem

Station X, Hut 8 December 21, 1941

Dear Hug,

Today, the Shark key is hard to find. We have a Crib
(IMMARINENETZ), but we do not know in what message
it can be, nor its position, nor if a turnover takes
place. I think it is impossible to find the solution.
In addition, we do not have bigrams tables and
therefore we can not use bamburismus.

Alan,

First message without the indicator (CRBM XLAO)

QHOR PVCS OPSE XIYC SSRD

FDKV NUZS GFYX YSLX KGFJ

QVBH

Second message without the indicator (FMTH UZHA)

QEOY LNSU MAVG CXRR OXTE

AQQA GOSE KWUV LLBR QKVT

FZQK