ATTACK CONDITIONS:
Seek to attack -
1. Out of the sun.
2. Facing the moon (from the dark side).
3. From the windward side, that is, upwind of the target.
4. For a stern shot (day) with moderate winds, say, less than 9 m/s, from the downwind side. In heavier winds, say 9 to 11 m/s, still attack from the windward side, even for a stern shot.
No submerged attacks over 11 m/s winds. These correspond to sea states at which it was nearly impossible to hold periscope depth in real life.
No submerged attacks at winds of 0 or 1 m/s. The sea is like glass, and any ripple of the scope can be seen. The only exception is on bright moonlit nights, at dusk, or with a very bright sun.
The winds corresponding to the ideal sea states for a submerged attack are 4 to 5 m/s.
For night surface attacks, anything below 15 m/s should be fine. And remember, approach on the “Hundekurve”, bow stays on target!
No recognition manual except for well-documented ships (warships, maybe Liberty ships)! IRL books did not have the extensive data that we have in the game. Use Ausdampfen (matching course/speed), plotting etc as recommended in the U.Kdt.Hdb. Only resort to data gathering through the scope in a pinch, or as confirmation of data obtained on the surface, and then only eyeballed!
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