Historical crash dive time for fleet boats?

[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.

[NEON DEON]

Originally Posted by 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:

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.

The boat is moving they flood negative and set the planes. Is that an acceptance trial for the boat done by a civilian crew? Sounds like it is a trial for the boat itself.

[Ducimus]

So far im guessing that from crusiing on the surface at 8 kts, and hitting crash dive, the boat should be completely covered with water with only the little pole on the stern protruding on the surface - in about 45 seconds?

[NEON DEON]

Maybe a test should be run to see how much crew training is factored in.

Hack it a bit with the most elite crew you can come up with and time it till the point that the boat is no longer visible.

Then run the same test with a bunch of Newbies.

Just to see what the extremes are so you have a gauge you can use to adjust it.

[sgt.weasle]

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.

when i run 'desk awash' my computer crashes every time..

(lol jk)

[jmjohnson36]

I asked my grand-dad on dive times ( he was a subbie in WW2) he thought it was 90 seconds from bell to 45ft. Hes 89 so....