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View Full Version : u-boats & active sonar...



oscar0072004
10-24-2004, 03:38 AM
i read somewhere that the type VIIC controll room was 60 cm wider to fit the active sonar. but did german u-boats really cary active sonar? i thought they only had passive. but please correct me if i,m wrong....

DSK_Hawkes
10-24-2004, 05:15 AM
I'd say only the XXI had an active sonar!

paxhispanica
10-24-2004, 07:57 AM
No , it was never used on a war patrol , but was tested on several uboat , but for mine detection

Drebbel
10-24-2004, 08:14 AM
Didn't they have a sonar to find depth below the keel ?

But they probably never used it. Would give away you stealth immediately.

bertgang
10-25-2004, 03:53 AM
Yes, the tool to find depth below is a sort of simplyfied sonar, fit to make only that measurement; now is really common, even for civilian use.

Not useful to find targets, anyway.

Leif...
10-25-2004, 05:10 AM
Most of the time there are no enemies around so there is no problem using it (the depth finder that is). Besides the transmitting power would most probably be quite low.

Leif€¦

Drebbel
10-25-2004, 07:28 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Leif...:
Most of the time there are no enemies around so there is no problem using it (the depth finder that is). Besides the transmitting power would most probably be quite low.

Leif€¦ <HR></BLOCKQUOTE>

But the depth finder woul only be used in coastal areas. And in those areas the enemy can be just around the corner.

I always thought that loosing stealth was the reason for not using this type of sonar. what else could be the reason Uboat captains did not like to use this equipment ?

Leif...
10-25-2004, 08:48 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Drebbel:

I always thought that loosing stealth was the reason for not using this type of sonar. what else could be the reason Uboat captains did not like to use this equipment ? <HR></BLOCKQUOTE>

I have no idea. Where have you heard/read that they don€t like to use them? I have never seen any statement like that (which of course doesn€t mean much).

Leif€¦

radsov
10-25-2004, 09:11 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Leif...:
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Drebbel:

I always thought that loosing stealth was the reason for not using this type of sonar. what else could be the reason Uboat captains did not like to use this equipment ? <HR></BLOCKQUOTE>

I have no idea. Where have you heard/read that they don€t like to use them? I have never seen any statement like that (which of course doesn€t mean much).

Leif€¦ <HR></BLOCKQUOTE>

Well I've heard from a current day submariner (chief petty officer) that they never ever used active sonar. I'd guess his career spanned around 30 years. Apparantly if switched on it could be heard with sensitive equipment for tens and tens of miles ( I forget exactly the figure he said, perhaps as high as 90). Not sure whether this would apply to WW2 but considering it was never used in peace time (if there is such a thing) I wonder if it was ever used outside of your home waters in WW2.

Leif...
10-25-2004, 09:57 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by radsov:
Not sure whether this would apply to WW2 but considering it was never used in peace time (if there is such a thing) I wonder if it was ever used outside of your home waters in WW2. <HR></BLOCKQUOTE>

Now that€s even stranger. In peacetime I would have my u-boats and every other boat available sent out on the sea mapping the depth over as large area as possible.

And I don€t think you can compare the equipment from WW2 with even 30 years old stuff, also there is a HUGE different in transmitting power between an active sonar and a depth finding equipment, HUGE.

Leif€¦

radsov
10-25-2004, 10:31 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Leif...:

Now that€s even stranger. In peacetime I would have my u-boats and every other boat available sent out on the sea mapping the depth over as large area as possible.
<HR></BLOCKQUOTE>
I don't find that strange as I would imagine the Navy have specialist vessals just for that task. I don't think you'd use up a valuable resource such as a submarine mapping the oceans floor. They have much more important role I would have thought.
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>
And I don€t think you can compare the equipment from WW2 with even 30 years old stuff, also there is a HUGE different in transmitting power between an active sonar and a depth finding equipment, HUGE.
Leif€¦ <HR></BLOCKQUOTE>

Agreed, probably shouldn't have brought it into the thread, I was just trying to give a submariners view of active sonar. Apologies for interupting your discussion with Drebbel