Quote:
Originally Posted by Tom
0,25 knots is just accurate enough. Assuming a range of 6000 meters and torpedo speed of 30 knots (torpedo running time 6,5 minutes) a 0,25 knot difference in target speed means a 100 meter difference in hit location. So each 0,25 knots covers 100 meters of target at that distance. If you get the speed set to the nearest 0,25 knots and aim at the center of a 100 meter target, you should hit it.
Of course, there is still the problem of measuring the speed and AoB accurately enough from that distance. The fixed wire method will give accurate enough speed, but AoB pretty much requires plotting, unless it's a convoy. With convoys you can get accurate AoB easily by maneuvering either exactly in front or behind a column or to the side of a row, because the columns lie exactly on the convoy course and the rows are exactly perpendicular to the course.
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6 kilometers would work, but the topicstarter asked about 14 km. I.e., a 10 knot target passing along 90 degrees would need to be measured accurately to within 0.08 knots if it is 78.5 meters long, or within 0.16 knots if it is 150 meters long.