Thank you guys
Also new environment is perfect for surface nights attacks… sneaking carefully through the escort shield, fire and escape full speed giving smaller silhouette
Arctic nights (North Sea, Baltic, Norwegian Sea, Iceland seas etc) are quite clear now when no overcast clouds.
Atlantic nights as well, but nevertheless darker.
Same for Mediterranean.
When some moon, no problem to spot ships into the binoculars.
And when high waves, spotting distances shorten a bit