Quote:
|
Originally Posted by tedhealy
It was done in the war. O'Kane's 'Clear The Bridge!' makes mention of buying the sonar man a metronome to more accurately determine target speed by counting prop turns.
|
Yes, but does this information make it clear to what degree of accuracy you could make your estimate - the counting part is relatively easy!
Prop count to speed is dependent on many variables such as size and type of engine and propellor, weather conditions and amount of cargo being carried
Also
when in the war is a relevant issue
So when they say they did it to gain more accuracy, do we know if the accuracy was to the nearest 0.1 knot, 1 knot or 2 knots, for example?