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ASDIC Active Sonar (J-Scope)

ASDIC, named after the Anti-Submarine Detection Investigation Committee, is an early active sonar. That means it pings and listens for the returns with the intent to locate underwater objects (soug) .

this specifically is a J-scope. that might be a little weird but it means that the time between the ping and return is shown on the scope radially. I didnt focus on realism for this one, rather something more interesting and fun to use.



A.1: Ranging scope. When active, the audio information will be displayed here. A spike means a return.

A.2: Sonar controls. As long as the switch is flipped it will keep pinging, if disabled it will complete its current cycle and then stop.

A.3: Cursor controls and rangefinder. Use the buttons to move the cursor over a spike of your choice and it will calculate its range. The 2 7-segments display the range in kilometers, and the gauge is the remaining range in meters.

B.1: Aiming scope. Displays ship heading, sonar bearing, and sonar FOV.

B.2: Range controls. Gauge shows set range in kilometers and the button cycles. Available ranges are 4500, 9000, and 18000 meters.

B.3: Aiming controls. Buttons change the sonar bearing and FOV. Gauge shows current fov

since the range setting changes the cycle speed of the scope immediately, only the ping after the range has been updated will be correct. The same goes for ranging with the cursor; if the range is set incorrectly for the data displayed, the range readout will be inaccurate.


if ya didnt get it. Aim the sonar to where you think the guy is, let it do its thing, and determine the range.
if its unclear its gonna make sense the moment you use it, i wouldve made a gif but its midnight and i have an actual sleep schedule now.

Feel free to use this, just give credit. it aint hard and it doesnt make your description "ugly"

I have a few other bits of sonar equipment finished and ready for upload, i just have to make all the ♥♥♥♥♥♥♥ media and ♥♥♥♥ needed for upload. i cant be arsed to put effort into that atm but expect them by the end of the week.