Greetings fellow submariners. I’ve just started playing SH4 Gold (ver 1.5?) and noticed in that the gauge on the bulkhead in the control room of the Porpoise never registers more than about 5 knots despite being at flank speed on surface. The gauge in the sonar/radar room displays the speed in knots correctly. Has anyone noticed this discrepancy? This is happening in the navigation training exercise. I have not installed any mods. Win 10 Pro. Thanks in advance for any advice.