Diving times...........

papillonuk · 09-12-07, 05:30 AM

I noticed summit... is it me or do american subs take longer to dive than there german counterparts......

or maybe it just seem long......

donut · 09-12-07, 05:57 AM

There are many treads on this subject,most in agreement.Do a "search",

on (Diving Times)

seaniam81 · 09-12-07, 06:19 AM

I'm currently reading Wahoo by RAdm Richard O'Kane and it seems like 40 seconds seems to be the average dive time. draw you own conclusions.

That being said. US boats were bigger than the german boats. Displacement of a Gato is 1526 (surfaced)/ 2424 (submerged) were a Type VIIC is 769 (surfaced) and 871 (submerged) both are in Tons (imp.) Think about this for a second the Gato has to take on 1000 extra tons to get under water and the Uboat and extra 100. Whats going to take longer?

Some other things that would help a Uboat get under quicker is the placement of the dive planes. With the american boat they are place about half way up on the hull when extended so there is no immediate use from them until the can get into the water enough to bite and help draw the boat under. The Uboat on the other hand had the dive planes on the bottom of the hull, providing an immediate benifit of helping pull the boat down.

All this being said the dive times in SH4 are a little off. I belive 1.3 stock a sub adrift will dive faster than a sub going flank speed ahead.

SteamWake · 09-12-07, 09:30 AM

Quote:

Originally Posted by papillonuk

I noticed summit... is it me or do american subs take longer to dive than there german counterparts......

or maybe it just seem long......

First off welcome to the forums papillonuk.

As donut stated this has been discussed at length several times. A search should reveal several threads on it.

American subs do indeed dive slower than the german U-boats. Then again they are typically larger.

One trick some folks use is to run with decks awash, this seems to fill the ballast tanks part way allowing a faster dive. Also the less amount of time from your previous dive the faster your current dive will go (water still in ballast tanks).

Rockin Robbins · 09-12-07, 03:45 PM

Actually the American boat's slower dive time is a non-factor with radar. As long as you time the dive properly, it doesn't matter if dive time is 120 seconds. Modern boats take even longer to dive, at least the boomers do, from movies I watched on You Tube. German boats' dive time was a survival skill. It is not on the American sub.

Ducimus has made dive time about 45 seconds for Trigger Maru and I like that a lot better than stock.

mookiemookie · 09-12-07, 05:50 PM

I've read it was 50 seconds in WW2, coming from an ex Requin sailor.

jdkbph · 09-12-07, 08:09 PM

You really have to qualify this when you discuss absolute times.

There is a book procedure for diving a boat, and then there is the "combat zone" procedure used by many of the experienced skippers and crews.

The former required, for example, a green board before any vents were opened, and other operational safety-first considerations.

The latter, on the other hand, included such irregularities as opening the vents while the conning tower hatch and the main induction were still open, and running on the surface, as a matter of course, with the negative tank already flooded... both of which would get you canned for sure during peace time.

But during war time.... that shaved the dive time (from dive order to sheers under) from 100 seconds or more to under 40, as I understand it.

JD

captiandon · 09-12-07, 11:40 PM

I timed mine from Flank Speed To parascope level from the time I gave the order was 2 min 12 seconds.

tater · 09-13-07, 12:00 AM

Most of the books I have have them aiming (with US fleet boats) for under 40 seconds.

They did mid-30s most of the time on crash dives. Stock is too long. Not to mention the crew didn't have to run forward

tater

SteamWake · 09-13-07, 10:50 AM

Quote:

Originally Posted by captiandon

I timed mine from Flank Speed To parascope level from the time I gave the order was 2 min 12 seconds.

Unfourtunatly the boats speed does not seem to effect diving times in the game.

In fact it has been revealed that the boat dives FASTER at a dead stop than at flank speed. :hmm:

I dont see that much difference and dive at flank anyhow, would rather have the manuvering speed available to me.

09-12-07, 05:30 AM	#1
papillonuk Swabbie Join Date: Aug 2007 Posts: 5 Downloads: 0 Uploads: 0	Diving times........... I noticed summit... is it me or do american subs take longer to dive than there german counterparts...... or maybe it just seem long......

09-12-07, 05:57 AM	#2
donut The Old Man Join Date: Apr 2004 Location: The Shifting, Whispering Sands, NM Posts: 1,463 Downloads: 10 Uploads: 0	Welcome aboard mate There are many treads on this subject,most in agreement.Do a "search", on (Diving Times)

09-12-07, 06:19 AM	#3
seaniam81 Commodore Join Date: Dec 2003 Location: Ontario, Canada Posts: 624 Downloads: 87 Uploads: 0	I'm currently reading Wahoo by RAdm Richard O'Kane and it seems like 40 seconds seems to be the average dive time. draw you own conclusions. That being said. US boats were bigger than the german boats. Displacement of a Gato is 1526 (surfaced)/ 2424 (submerged) were a Type VIIC is 769 (surfaced) and 871 (submerged) both are in Tons (imp.) Think about this for a second the Gato has to take on 1000 extra tons to get under water and the Uboat and extra 100. Whats going to take longer? Some other things that would help a Uboat get under quicker is the placement of the dive planes. With the american boat they are place about half way up on the hull when extended so there is no immediate use from them until the can get into the water enough to bite and help draw the boat under. The Uboat on the other hand had the dive planes on the bottom of the hull, providing an immediate benifit of helping pull the boat down. All this being said the dive times in SH4 are a little off. I belive 1.3 stock a sub adrift will dive faster than a sub going flank speed ahead. __________________ Ultima ratio regum. (The final argument of kings) - Inscription on french cannons, on order of Louis XIV Last edited by seaniam81; 09-12-07 at 06:47 AM.

09-12-07, 03:45 PM	#5
Rockin Robbins Navy Seal Join Date: Mar 2007 Location: DeLand, FL Posts: 8,900 Downloads: 135 Uploads: 52	American boat's secret weapon Actually the American boat's slower dive time is a non-factor with radar. As long as you time the dive properly, it doesn't matter if dive time is 120 seconds. Modern boats take even longer to dive, at least the boomers do, from movies I watched on You Tube. German boats' dive time was a survival skill. It is not on the American sub. Ducimus has made dive time about 45 seconds for Trigger Maru and I like that a lot better than stock. __________________ Sub Skipper's Bag of Tricks, Slightly Subnuclear Mk 14 & Cutie, Slightly Subnuclear Deck Gun, EZPlot 2.0, TMOPlot, TMOKeys, SH4CMS

09-12-07, 05:50 PM	#6
mookiemookie Navy Seal Join Date: Nov 2005 Location: Houston, TX Posts: 9,404 Downloads: 105 Uploads: 1	I've read it was 50 seconds in WW2, coming from an ex Requin sailor. __________________ They don’t think it be like it is, but it do. Want more U-boat Kaleun portraits for your SH3 Commander Profiles? Download the SH3 Commander Portrait Pack here.

09-12-07, 08:09 PM	#7
jdkbph Captain Join Date: Mar 2007 Posts: 508 Downloads: 104 Uploads: 0	You really have to qualify this when you discuss absolute times. There is a book procedure for diving a boat, and then there is the "combat zone" procedure used by many of the experienced skippers and crews. The former required, for example, a green board before any vents were opened, and other operational safety-first considerations. The latter, on the other hand, included such irregularities as opening the vents while the conning tower hatch and the main induction were still open, and running on the surface, as a matter of course, with the negative tank already flooded... both of which would get you canned for sure during peace time. But during war time.... that shaved the dive time (from dive order to sheers under) from 100 seconds or more to under 40, as I understand it. JD

09-12-07, 11:40 PM	#8
captiandon Soundman Join Date: Sep 2007 Posts: 148 Downloads: 0 Uploads: 0	I timed mine from Flank Speed To parascope level from the time I gave the order was 2 min 12 seconds.

09-13-07, 12:00 AM	#9
tater Navy Seal Join Date: Mar 2007 Location: New Mexico, USA Posts: 9,023 Downloads: 8 Uploads: 2	Most of the books I have have them aiming (with US fleet boats) for under 40 seconds. They did mid-30s most of the time on crash dives. Stock is too long. Not to mention the crew didn't have to run forward tater