TMOwTw, if I'm not mistaken, put the thermal layer back to almost stock (aanker??), so it should help. If it's found at 190, you would go to about 235 then, to have the whole boat below it. Put the throttle telemetry on 1 knot, or use the rpm gauge somewhere below 90, if it's functional in TMOwTw (50-90rpm), and "Silent Running". Already have an "escape" route picked out, and go that way, stay that way, slight turns every once in a while. Warning though: if it's daylight, and a calm sea, you'll need an additional step: Bend over and kiss the moon goodbye...