Historical crash dive time for fleet boats?

[Loaf]

Does anybody know if crew experience affects dive times in SHIV?

[Onkel Neal]

Originally Posted by Loaf

Does anybody know if crew experience affects dive times in SHIV?

That's what I was wondering... anyone timed crash dives with a green crew and with a vet crew?

I keep starting new careers so I have yet to get more than 2 patrols with one crew

[AVGWarhawk]

Originally Posted by Neal Stevens

That's what I was wondering... anyone timed crash dives with a green crew and with a vet crew?

I keep starting new careers so I have yet to get more than 2 patrols with one crew

Yahoo! The new CEO of the "2nd Patrol Your Dead Club"

[Faamecanic]

Originally Posted by Neal Stevens

That's what I was wondering... anyone timed crash dives with a green crew and with a vet crew?

I keep starting new careers so I have yet to get more than 2 patrols with one crew

Green crew on a GATO type sub (Patrol 2) and was 75 seconds from Crash dive order to the whole sub being submerged at 40 feet (antenna just under the water) on a clear day.

[Bilge_Rat]

one more thought:

- I presume the best times of 30-35 seconds were achieved under ideal conditions, namely sub at best speed, best sea conditions, fresh crew specificallly training for quick time.

-but in a more typical battle scenario, for example a lookout spots an airplane/ship and the OOD orders a dive, the sub is moving at cruising speed, the sea conditions are probably less than ideal, the crew is not at battle stations and is probably a bit tired from a few weeks/months at sea, 45-60 seconds is probably more typical.

[Faamecanic]

I can buy 45-60 seconds....but 75 seconds!!! And those Dead Eye Dick Jap bombers almost NEVER miss. Needless to say the only way to avoid the aircover is to stay submerged during the day and only run on the surface at night.

[NEON DEON]

Originally Posted by Faamecanic

I can buy 45-60 seconds....but 75 seconds!!! And those Dead Eye Dick Jap bombers almost NEVER miss. Needless to say the only way to avoid the aircover is to stay submerged during the day and only run on the surface at night.

It is the first dive that will get you killed. The second dive should get you under in about 30 to 40 seconds. Of course, you have to dive every two hours to get the benefit. No proplem if you are in japanese home waters. The air cover should force you down a lot.

[MadMike]

George O. Jones writes in his online memoirs as an S-boat crew member that riding the vents they could dive in 30 seconds (!).

http://www.geocities.com/goliverjones/home.htm

Yours, Mike

[Floyd]

Originally Posted by Loaf

Does anybody know if crew experience affects dive times in SHIV?

Put the crew to battle station and the boat should dive way faster. Time might be affected
by fatigue status of crew, but i have no real numbers. I forgot my crew on battle station
once and all were approx. 90-99 fatigue. Had the impression that every command
too very long to be followed. Oh, and the engines stopped.

[NEON DEON]

An excerpt from the USS Pampanito web site.

"A World War II submarine spent most of its time on the surface where it could travel quickly and more easily find its targets. She dove to make stealthy attacks or escapes from the enemy. To make it possible for the crew to walk outside the boat while on the surface, and to protect equipment that is not in the pressure hull, the main deck is built up over the pressure hull. The space between the pressure hull and the deck is the free-flooding superstructure. The many holes that are visible allow air to escape and water to flood this space. Any trapped air would slow down the dive. Pampanito can go from the surface to 60 foot depth in under 30 seconds."

http://www.maritime.org/tour/tadeck.htm

Anyways that's my story and I am sticking to it.

[Sgian Dubh]

I don't have much to add in terms of factual data, but I can tell you that if you travel with 'desk awash' in SH4, the dive time is greatly reduced, mainly because the dive-planes are already run out and (I guess) the boat is already cloaser to neutral boyancy.

I only travel this way on the surface during the day. Even with the short range of the "Plane!" calls, I am under long before the plane can get to me.

[AVGWarhawk]

Originally Posted by Sgian Dubh

I don't have much to add in terms of factual data, but I can tell you that if you travel with 'desk awash' in SH4, the dive time is greatly reduced, mainly because the dive-planes are already run out and (I guess) the boat is already cloaser to neutral boyancy.

I only travel this way on the surface during the day. Even with the short range of the "Plane!" calls, I am under long before the plane can get to me.

Nice to know but I love shooting the twin .50's at the planes

[Sgian Dubh]

you can run 'desk awash' and shoot the gun yourself.

The watch crew is still on the bridge as well.

[AVGWarhawk]

Originally Posted by Sgian Dubh

you can run 'desk awash' and shoot the gun yourself.

The watch crew is still on the bridge as well.

Yes, I know but I like staying surfaced and shooting away

[Bilge_Rat]

just to add more fuel to the fire, I was skimming through the online version of "The Fleet Type Submarine" http://www.maritime.org/fleetsub/index.htm

In chapter 18A dealing with diving, it states:

18A2. Types of dives

Three types of dives are possible: 1) the quick dive, 2) the running dive, and 3) the stationary dive, the choice being dictated by existing conditions. In all dives the ship is placed in the condition of neutral or negative buoyancy; the use of negative buoyancy shortens the diving time. A quick dive is made when the ship is underway on one or more main engines. The bow planers are placed on FULL DIVE and the forward speed results in a maximum downward thrust on the bow planes. As the submarine submerges, the upper surfaces of the hull and superstructure act as planing surfaces and increase the downward thrust. The quick dive is the fastest of the three types and is used in acceptance trials of new submarines, when it must be executed within 60 seconds from standard diving trim.

This seems to imply that the US Navy standard was for the dive to be completed in 60 seconds. Certainly, a crew testing to achieve the quickest time could possibly dive in 30 seconds, but if a boat is surprised and does an emergency dive, 30 seconds from the dive order to periscope depth seems a little tight.