[Bellman]

Tested SW turning :-

1. No speed bleed-off with 90 deg turns at 15 and 30 knots both when manual and 'dialed-in' induced.
2. Progressive bleed starts when a sustained manual turn goes through its 180 deg point.
3. With a manual (only) sustained turn when the turn has reached its 360 deg point all speed has gone and
the sub reverses (breaks TA) at 1 knot as its nominal heading goes through the next 90 degs When it has
completed this final 90 deg forward motion is regained progressively.
4. Depth loss is progressive egs at 30. knts -142 ft in 360 degs.
5.The rate of bearing change is proportionate to speed.

Would have expected some bleed at high speed and max rudder inclination in turns up to 180 degs. :hmm: