XXI Passive/Active Sonar Attack Question

[Xnemth]

I tried searching the forums but didn't find what I was looking for.

How exactly can I make a submerged torpedo attack against a ship without raising my periscope?


Using the hydrophone, I get the 'warship' tag to appear in the notepad, and I press the checkmark button, but the bearing is not sent to the TDC. The active sonar pulse DOES update the range in the TDC. What gives?

Also, how can I determine speed/AOB with this equipment? Do I have to be stopped, or can this be done while moving?

Thanks in advance!

[Mopy]

Welcome How goes?

I watched an excellent hydrophone attack tutorial a few days back. He effectively intercepts and sinks a target without raising the periscope to check it. This may help with your speed/AOB question also. Here is the video tutorial link;

http://www.subsim.com/radioroom/showthread.php?t=154461

I can't answer the notepad question unfortunately, as I use only the manual TDC screen and enter settings there. It's well worth looking into using that instead of the notepad if you haven't already done so. The video deals with this also.

[JMV]

There are many other Hydrophone Tutorials. From Raduz to Joegrundman, etc...
Nefelodamon Hunting Tutorial is certainly good but it's the most recent.
PM me, give your e-mail address and I sent you all my doc.

A Type XXI is way out of my league.

[Pisces]

Originally Posted by Xnemth

I tried searching the forums but didn't find what I was looking for.

How exactly can I make a submerged torpedo attack against a ship without raising my periscope?


Using the hydrophone, I get the 'warship' tag to appear in the notepad, and I press the checkmark button, but the bearing is not sent to the TDC. The active sonar pulse DOES update the range in the TDC. What gives?

Also, how can I determine speed/AOB with this equipment? Do I have to be stopped, or can this be done while moving?

Thanks in advance!

Well, with the active sonar you get a range and a bearing. (sort of ... find the middle of the sound by listening where the sounds die out and looking at the notepad) You can use that to plot on the map just as if it was a periscope measurement or a report from your watch officer on the bridge. If you ping twice with enough time in between you can accurately measure the distance it has moved and so calculate it's speed.

I suppose the 3 minute-15 second rule works, but the target would need to be prety close to notice any significant change in bearing. And that's also when things happen very quickly, so you might be too late to fire from a good position. Better to make it easier on yourself and make the first ping as soon as possible and wait longer in between pings for more accurate speed (and course).

If you want you can do this moving, but only if you plot those distances and ranges from where you are at that time.