Crash Dive

Zosimus · 12-22-14, 09:09 AM

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.

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

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

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

Some of us prefer life.

U-15 · 12-26-14, 08:38 AM

Quote:

Originally Posted by Kielhauler1961

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.

12-22-14, 09:09 AM	#1
Zosimus XO Join Date: Jun 2014 Location: Chorrillos, Lima, Peru Posts: 401 Downloads: 3 Uploads: 0	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. 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?

12-23-14, 11:37 AM	#4
Raptor Weps Join Date: Nov 2002 Location: Pacific NW, USA Posts: 350 Downloads: 54 Uploads: 0	Stay out of shallow water with that setup. __________________ Raptor

12-22-14, 10:28 AM	#2
yasti Sailor man Join Date: Jan 2012 Location: Townsville, QLD, AU Posts: 46 Downloads: 130 Uploads: 0	Yes changing that figure changes crash dive depth

12-23-14, 10:35 AM	#3
Zosimus XO Join Date: Jun 2014 Location: Chorrillos, Lima, Peru Posts: 401 Downloads: 3 Uploads: 0	I have changed my Crash Depth setting from 70 to 140. So far no problems have been observed.

12-23-14, 02:15 PM	#5
Zosimus XO Join Date: Jun 2014 Location: Chorrillos, Lima, Peru Posts: 401 Downloads: 3 Uploads: 0	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.

12-23-14, 08:59 PM	#7
Zosimus XO Join Date: Jun 2014 Location: Chorrillos, Lima, Peru Posts: 401 Downloads: 3 Uploads: 0	According to the Wikipedia article, which does not quote any sources, the typical depth is 70 to 90 meters.

12-25-14, 05:13 PM	#9
Zosimus XO Join Date: Jun 2014 Location: Chorrillos, Lima, Peru Posts: 401 Downloads: 3 Uploads: 0	Some of us prefer life.