Some Sonar detection data.

A scenario would be like this.

The current sub try to be stealth, and using only passive sonar for enemy sub detection. Pic1 indicates a enemy sub is coming in.



After the passive sonar detection, the captain then turns on its active sonar to have a better picture of the enemy sub.




Active/passive sonar involves active/passive towed array sonar?

I don't think you need active sonar to get bearing. You definitely don't need a towed array but would prefer one to keep an eye on the blind aft of the props.

Passive towed arrays or flank sonars are more than capable of giving bearing and depth. No need to ping and give away your location.

Ranging is a bit more trouble with the passive system though.

^can you tell on what sonars used on the pic1 versus pic2. Pic1 looks like some sort of spectral lines. whereas pic2 look more a radar.

Pic1 is first one they used and then crew turned to pic2. on the pic2, they also able to inidicate the enemy's torpedo's launching and heading toward their sub.

antimatter said:

^can you tell on what sonars used on the pic1 versus pic2. Pic1 looks like some sort of spectral lines. whereas pic2 look more a radar.

Pic1 is first one they used and then crew turned to pic2. on the pic2, they also able to inidicate the enemy's torpedo's launching and heading toward their sub.

Click to expand...

I'm guessing pic one is traditional Lofargram Isovelocity profile.

pic two is visualization of bearing.