From What distance Merchant crews could spot u boat at night

[Niume]

Originally Posted by Kendras

It is for SH4, but I think it works also for SH3 :

http://www.subsim.com/radioroom/forumdisplay.php?f=219

At night, a U-Boot was invisible if there was no moon in the sky. If there was moonlight, the U-Boot was nearly impossible to detect if its hull was turned towards the ennemy, or if the moon was behind her.

Just my 2 cents...

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