Sonar doesn't seem to work

[Lucerillo]

- Sonar Unable to estimate contact
- Random 10000+ number
No matter what the distance is.

Patched with last GenericPatcher. Hydrophone works fine.

Any help?
Thanks.

Edit:
Additional Data. Using 24Unterseeboot 1.2 + Reworked Morale and Abilities v.1.1