Quote:
Originally Posted by v-i-c-
The maximum surface speed of a Type VIIC is 17.7 knots (9.1 m/s) at AK. And 18.x knots when overloaded (480/490 RPM) - your 7.7 knots sounds like E-Machines (8 knots submerged and 10.5 knots on the surface at AK)
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You are right. I did a mistake, now the entry is corrected. Thank you for correction.