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- Silent Hunter III (https://www.subsim.com/radioroom/forumdisplay.php?f=182)

- - Crash Dive (https://www.subsim.com/radioroom/showthread.php?t=217430)

Zosimus

12-22-14 09:09 AM

Crash Dive

These numbers are from NSS_Uboat9

[Properties]
PeriscopeDepth=13.5;meters 12.5
SnorkelDepth=14;meters
CrashDepth=70;meters
MaxDepth=500;meters
SurfaceDepth=8;meters
TorpLaunchMaxDepth=20;meters

Has anyone tried messing with the CrashDepth setting? I suppose that if you set CrashDepth to 80 that the ship would go to 80 meters under whenever you sounded the alarm.

http://i.ytimg.com/vi/Dm-uif8SYYs/maxresdefault.jpg

What do you think? Worth messing with? Leave it alone? What number is right? Would it be worthwhile to set for a 180 meter crash dive? Is this something a captain reasonably controlled?

yasti

12-22-14 10:28 AM

Yes changing that figure changes crash dive depth

Zosimus

12-23-14 10:35 AM

I have changed my Crash Depth setting from 70 to 140.

So far no problems have been observed.

Raptor

12-23-14 11:37 AM

Stay out of shallow water with that setup.

Zosimus

12-23-14 02:15 PM

Who hunts in shallow water?!

I tested the crash dive in a real situation. In low visibility a destroyer showed up. I spotted him at about 800 meters and crash dived to safety. No damage was sustained.

Sailor Steve

12-23-14 05:30 PM

Quote:

Originally Posted by Zosimus (Post 2270837)

What do you think? Worth messing with? Leave it alone? What number is right? Would it be worthwhile to set for a 180 meter crash dive? Is this something a captain reasonably controlled?

In real life when a submarine does a normal dive the tanks are flooded partway, to achieve a neutral trim. The dive planes take the boat down in a controlled fashion. In a crash dive the tanks are fully flooded and the water in the trim tanks is moved forward. This gets the boat down faster but leaves it with the tanks full. They have to be pumped out to stop the dive and this takes time. I don't have any sources I can show at the moment but from what I've read in the past 70 meters is about right. You can always dive deeper after that.

Zosimus

12-23-14 08:59 PM

According to the Wikipedia article, which does not quote any sources, the typical depth is 70 to 90 meters.

Kielhauler1961

12-25-14 11:37 AM

Quote:

Originally Posted by Zosimus (Post 2271315)

Who hunts in shallow water?!

You can't have spent much time in the North Sea, Caribbean or Black Sea then?

Hunting in shallow water refines one's tactics and brings a whole new perspective to plotting an attack and escape.

KH

Zosimus

12-25-14 05:13 PM

http://www.orkugifs.com/en/images/blah-blah_1995.gif

Some of us prefer life.

U-15	12-26-14 08:38 AM

Quote:

Originally Posted by Kielhauler1961 (Post 2271807)

You can't have spent much time in the North Sea, Caribbean or Black Sea then?

Hunting in shallow water refines one's tactics and brings a whole new perspective to plotting an attack and escape.

KH

Very well put and absolutely correct KH.

I'm in the North Sea at the moment in a small Type IIA, with just 30 metres before I scrape the sea bed.
These situations certainly make you aware of the limitations as for making an escape if caught unawares by an enemy warship.

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