Range prediction, fast fire solution.

[NavyUSA]

Originally Posted by Pisces

Well, I didn't mean to ask about what standard deviations are in general. Just in this context, in that table. Standard deviations are the summed squares of differences to a mean value, divided by the population size. But what sort of values and means is that table based on? 'Barnacle size' on the sperical array?

The population is made by misure of the bearing rate for different target course, range and relative bearing, a large number of measurements.
The standard deviations in that tables shows how much is variation or dispersion of the bearing rate from the average value, for the particular situation fixed by relative bearing, type of los and range.

Originally Posted by Pisces

Would you care to elaborate on that? Are you expecting all opponents to move at speeds between 5 and 7 knots? Sure, submerged opponents that know that you are there would want to stay silent, and thus slow. But that doesn't account for all,or most situations.

Good observation. During a research phase, the submerged opponents probably want to stay silent at speeds between 5 and 7 knots, best search speed is 7.
If a player is moving at speeds less than 5 knots, means that its towed array will be curved in depth, this will not give him a good solution, and the transducers can be below the layer. I think that an experienced player will never move at speeds less to 4 knots in research or attack phase.
Still, if the target has a velocity greater than 8 knots, is very likely that you will hear him with two sensors or you can get information from the demon. In these cases it's easy to proceed with the usual methods, Triangulation, Strip plotting ecc..


I have answered to your doubt?



Thank you for your interest