"Rundhorchen" - Listening around for contacts on which depth???

[Pittiplatsch]

Hi Kaleuns,

I have 2 questions:

1.) In reality during WW2:
If the Kaleuns of german U-Boots wanted to listen around for contacts (Rundhorchen) - On which depth did they go?
On which depth did they reach the best result (Longest range) in listening around?

2.) Same question, but for "using GWX":
If I want to listen around (Rundhorchen) for contacts in GWX - On which depth should I go? Is there a particular depth on which I will get the longest range in listening around (Rundhorchen)?
Or do I get the same range (no matter how deep I'm)?
Should I go on 14 meters, 30 meters or ?? meters depth?

Greetz

[froschman]

I go to about 20 m depth, when trying to find ships outside the visual range. I have not made any detailed study, but my impression is that this works pretty well.

[Spruence M]

Captian on Das Boot went to 25 meters.

[Jimbuna]

I think you get the same range regardless of your submerged depth :hmm:

[looney]

I have read a book on a dutch sub wich did most of their under water stuf at 35m.
So most likely each kaleun would have his own personal depth for it.

[BelegDraug]

Well, in the "real-real" world ('cause for me, GWX is just like the "real" world), the distance of the hidrophone would change with the temperature and salt of water. This same principles and theorys are used today estimating the modern SONAR capabilities and other stuff.-

[Heibges]

The Uboat Commanders Handbook says it should be done at 20m travelling at Silent Running.

Afterwards you should go up to PD, and have a look around.

Finally, resurface at High Speed.

[Saldiray]

As long as you're above the thermal layer, any depth is suitable, i think.

[XLjedi]

I like 25m only because it happens to be the max on the shallow scale dial.

If I have the deep scale turned on, I'll go 60-80 from time-to-time.

[Brag]

Originally Posted by jimbuna

I think you get the same range regardless of your submerged depth :hmm:

I think in reality 30 meters worked best.
In sh 3 any depth 12 or more meters works the same

[Kpt, Otto]

Originally Posted by Heibges

The Uboat Commanders Handbook says it should be done at 20m travelling at Silent Running.

Afterwards you should go up to PD, and have a look around.

Finally, resurface at High Speed.

In the real world this is how im sure they would have done it, being at slow speed would have been important to get best results for the sea underwater conditions.

In SH3 GWX most of my war has so far been off the east coast of Britain and there I often submerge and listen for contacts at a depth of 25m due to how shallow it is there. Normally I can pick up a contact upto around 30 km away. If I then go to periscope depth I have had sound contacts that were far away fade and become inaudable (if there is such a word, dont look right probably spelt it wrong!!)

What I have noticed it that often I must take control of the hydrophones and listen because if I ask the sonar operator he reports "no sound contact", I think he is a bit deaf because sometimes I check and find very slight sound contact on what ever bearing these often prove to be genuine.

Between 25-35m Thats what I do!

[Jimbuna]

Originally Posted by Saldiray

As long as you're above the thermal layer, any depth is suitable, i think.

Precisely.......in RL anyway

[Cezbor]

Periscope depth, engines at full stop, ....... window closed, no family arround, fingers crossed, hot coffee on the table