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Advanced Sonar Tracker

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The ship and torpedo are only really intended as a showcase for the sonar system.

This sonar system was derived mostly from my TWS system. So it's not surprising it works almost identically too. It works by building up a list of new detections before updating target tracks. It doesn't use a position threshold to update target tracks. Instead, tracks are updated by first building a matrix of the distances from detections to tracks. Then using the Hungarian algorithm (Kuhn-Munkres) to find which detection-track pair is closest ( https://en.wikipedia.org/wiki/Hungarian_algorithm ).

This system is also incredibly modular, you can change the UI or add more sonars. I'll touch more on this later in the description.

Selected target coordinates are outputted on channels 1,2,3, where channel 1 is west/east, channel 2 is altitude, channel 3 is north/south). Channel 4 is the ID for which missile is assigned to the track.

Most of the buttons are just for decoration, but to turn on the sonar you must first press the ping toggle. If you then want to launch on a specific target, highlight the track through the monitor and then press the space-bar to launch a torpedo.

With a little work you can add more sonars, in order to increase scan rate. To do so, you'll have to manually change the two highlighted numbers in the lua code though. These numbers are marked with the note "--#sonar", set the first value to the number of sonars in your system and the second to the number of channels you are taking from each sonar.

I've also added a few different options to change sonar parameters in the MC, it's not obvious what each of these do since I've had to keep the names short because of the character limit.

If you feel that target's are disappearing too fast/slow after losing lock you can change it with the "Decay" parameter. Setting this to 8 will mean the target will be deleted if it hasn't been detected for the last 8 scans.

"X" and "Y" should be set to your monitor's size.

The "S" parameter is a bit difficult to explain. This TWS updates tracks by assigning the closest new sonar contact. This can be a problem if you lose a lock on one target, but acquire a different target on the other side of the map. Normally, the algorithm doesn't care how far they are away, it'll update the old track with the new target. S will limit the TWS, by default it's limited to 900 metres, but you should increase this as you increase radar range.

The "M" parameter is pretty niche, makes it so that only the coordinates of the selected target are outputted. Remember that it still outputs altitude over channel 2 though.

If you want details about the code, just DM me.

Feel free to re-upload the torpedo and sonar system on your own vehicles, so long as you provide the link to this WS page. Do not, however, re-upload the ship.