It has all been hashed and rehashed in the forum ifd you look around enough.
It is all semantics anyway because all of this changes depending on what mods you use. Some mod appropriate speeds and some do not. Some mods adjust the jack rabbit starts and stops and some do not.
The key is finding the mods that make it realistic.
If you want to read what the real skippers thought and did during WWII all you have to do is read the reports.
http://www.hnsa.org/doc/subreports.htm
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Generic Mod Enabler - v2.6.0.157
[Z:\Silent Hunter\MODS]
RFB_2.0
RFB_2.0_Patch_23April2010
RSRDC_RFB_V575
RSRDC_V5xx_Patch1
Improved Ship Physics_1.1
EAXsoundsim_without_WebstersManeuver_STOCK_GFO_OM
Classe_Balao_CamoTri