Knowing the distance can also be useful to time attacks on different targets. Say you see two steamers in different rows of a convoy; if you know the distance between the two, you can calculate (I have a pre-made table listing all distances and torpedo run times) the difference in time you need to fire them. (If that makes sense.)
BUT! I got an idea yesterday. If you know the length of a ship and you know or can find out the number of degrees it spans in you UZO/periscope, the distance is a relatively simple calculation. I could make a table using different lengths and number of degrees. Question is: would this work? It would be less accurate at AoB other than 90* and at high speeds of the target, but it would give a good estimate.
And yes, I realise I could/should ask the 1WO the range to target, but as Kaleun, I should be able to handle every job myself.
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