I find below in VIIC manual on
http://www.uboatarchive.net/Manual.htm
Time to reciprocal heading
Rudder Hard Over
and
Speed
setting
Time to Reciprocal heading
Trim Condition A
Trim Condition B
Submerged
AK
1 min 10 sec
1 min 13 sec
min sec
GF
1 min 11 sec
1 min 15 sec
min sec
HF
1 min 17 sec
1 min 23 sec
min sec
LF
1 min 33 sec
1 min 36 sec
min sec
KF
2 min 23 sec
2 min 35 sec
min sec
My question here is "reciprocal heading" means 180 degrees turn? if yes, seems it is much faster than the what we have now on VIIC.