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Member
ok, i have the radio qualification to give out. But I dont see a sonar qual..is the radio one both or what? or is it as simple as I need to scroll down? Ill check on that.
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Member
But if I have to do all this stuff (dive, stop engines, etc, etc) just so my sonar monkey MIGHT be able to hear something, why would I do that when I can easily do a hydrophone sweep myself when on the surface?
Dano
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Member
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by RealHondo:
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>...I'm well aware that its mounted on top side and sticking outside the water when surfaced... <HR></BLOCKQUOTE>
That is not true, the GHG (Gruppenhorchgerät) is under water, at least most parts of it. It should be definately possibly to hear something when surfaced, but being submerged should benefit a lot. I guess you are confused by the KDB (Kristalldreh...something) which is atop the deck. <HR></BLOCKQUOTE>
Well, just because a part of it is in water DOES NOT mean that you hear good.. Because, it must be entirely covered with water or else you will get a lot of noise and air poring around.
I've got IRL experience of SONARs and when the uboat is surfaced you dont even man the SONAR because it's not worth it.
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Member
I have read a first hand account of a uboat sonar operator who did use the sonar while being surfaced (and yes, he could hear something 
). It was during a night surface attack. IIRC the boat had stopped though.
Btw, I am talking about "Feindfahrten" by Wolfgang Hirschfeld, I don't know if there is an English edition.
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Member
There's actually some issues with sonar /hydrophones.
- I've got an active sonar on my type VIIB !!??
Not to mention in 1940 and it works : PING !
- My Chief Sr Petty-officer with Radio qualification and 230/300 experience is still unable to hear anything less than 10-15 km away, which I can hear about 30km (I've made test on surface, 25m and 60m deep, engine stopped and for around 10mn each).
- I still be able to use the KDB hydrophone at surface with it out of the water !
And during my test phase with my Sonar AI operator :
Engine stopped, he picked up nothing.
Going to surface at ahead standart and suddenly he scream "CONTACT !" at around 15m depth, what the .. ?
Hopefully devs are on it for the next patch.
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Junior Member
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by RealHondo:
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>...I'm well aware that its mounted on top side and sticking outside the water when surfaced... <HR></BLOCKQUOTE>
That is not true, the GHG (Gruppenhorchgerät) is under water, at least most parts of it. It should be definately possibly to hear something when surfaced, but being submerged should benefit a lot. I guess you are confused by the KDB (Kristalldreh...something) which is atop the deck. <HR></BLOCKQUOTE>
Oke, now I'm getting some what confused.
I'm indeed talking about the KDB hydrophone, and not the GHG, older version.
In the descriptions it stats it mounted on top of the upper deck of the uboat, what can be turned with around 160 degree's from inside the sub. A nice little "T" kind of thingy is shown on my uboat aswell it can be clearly seen when having a good look at your sub from the outside.
This things looks to me, like its gonna by out of the water most of the times when the sub is surfaced. Only times it will go underwater is with rough weather and bigger waves and fully when the sub dives down. But I don't believe this should give a good hearing condition either, with the waves crashing ontop of the device, but thats just a wild gess.
So far, i've not had much better test results or sonar contact reports when diving down to a 30meter depth, neither could I hear much of a differance when manually operating the hydrophone.
(and yes, the KBD works above water in the game. if it should I don't know.)
My statment still stands. I'm having poor results from my sonar officer when it comes down to reporting contacts.
I'm not planning on doing micro-managment in my sub, if I can hear screws, why can't my officers and report it! I give orders, I should not be doing the work my self!
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Member
This does sound a bit off. Experienced Sonar operators should not really affect detection range, but should be able to say something like 'Contact Herr Kapitan (or whatever!), I think its a convoy, between 3-10 ships, and I count two of what sounds like destroyers, could be about 15nm away, maybe further!' A doofus SO would still pick up the noise (I mean he's got ears, just like the senior guy!), but he would say 'Sir, I hear some ships!' Something like that. A good Captain relies on his crew to give him info, and does not NEED to micromanage. I have some idea, I have been in these situations.
The point is, detection range is equipment (that includes ears!) and condition based, not experience based. Experience gives the ability to make intuitive, educated estimates based on the tricky to interpret data you get.
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Member
Ok now I managed to hear 3 contact at very long range (around 130km) of course my qualified sonarman (see above post) didn't.
Also, at 30m depth and engines stopped, good weather, and bottom at 53m depth.
Look at Diissss :
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Junior Member
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Athlonics:
Look at Diissss :
<<picture removed see reply original post above>>
<HR></BLOCKQUOTE>
You sure about this, its not some radio contact update along with a time listed?
When my sonar officer reports a ship, and i'm playing with the map updates realisme on, it will draw a line towards the contact. I don't see sonar lines her (and you have contact updates drawn on the map), so i'm kinda think its a radio message of ship spottings along with a heading and speed.
But then again, I never had a sonar contact beyond 15km range reported, who knows your right, yet I've got my doubts.
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Junior Member
Hehe
@the picture
Hes got the radio reported contact, mixed up with the sonar contact.
Those contacts that you see are given to you by radio reports from BdU. They will fade out over time to show the reliability of the position.
Sonar contacts are indeed black lines drawn from your uboat. They are drawn in the direction of the sound.
The boxes are radio reports.
