Submersible manoeuvring

ABBAFAN · 06-27-23, 12:29 PM

I was wondering, why is it that submersibles must descend and rose so slowly? I assume they don’t want to hit the bottom too rapidly and of course shooting up to the surface too fast would present problems but I wondered if there are specific reasons. If a submersible has to make an emergency ascent, how fast could this be done?

August · 06-27-23, 01:12 PM

Quote:

Originally Posted by ABBAFAN

I was wondering, why is it that submersibles must descend and rose so slowly? I assume they don’t want to hit the bottom too rapidly and of course shooting up to the surface too fast would present problems but I wondered if there are specific reasons. If a submersible has to make an emergency ascent, how fast could this be done?

I believe the one that recently imploded had a mechanism which would allow the operator to release its ballast. That would cause it to make an uncontrolled ascent.

em2nought · 06-27-23, 02:59 PM

Quote:

Originally Posted by August

I believe the one that recently imploded had a mechanism which would allow the operator to release its ballast.

They would all lean to starboard.

Jeff-Groves · 06-27-23, 03:18 PM

Quote:

Originally Posted by em2nought

They would all lean to starboard.

Yeah like that's a good idea.
Under water which side is starboard? And watching Veterans Day Parade this year?
I can't tell you how many marched out of step! For God's sake! Years later and they still can't stay in step!!!
So if told to lean to starboard? To Late! Crunch!

August · 06-27-23, 03:33 PM

Quote:

Originally Posted by em2nought

They would all lean to starboard.

em2nought · 06-27-23, 03:35 PM

Quote:

Originally Posted by Jeff-Groves

Yeah like that's a good idea.
Under water which side is starboard? And watching Veterans Day Parade this year?
I can't tell you how many marched out of step! For God's sake! Years later and they still can't stay in step!!!
So if told to lean to starboard? To Late! Crunch!

Port four letter, left four letters, starboard more letters, right more letters. Easy peasy

They had redundant methods, but crew moving to one side and then another which would release the rusty old pipes carried as ballast was actually one of those ways.

Jeff-Groves · 06-27-23, 04:39 PM

Meh. Easier being a ParaTrooper. Only one direction to remember.
DOWN!

August · 06-27-23, 04:46 PM

Quote:

Originally Posted by Jeff-Groves

Meh. Easier being a ParaTrooper. Only one direction to remember.
DOWN!

Most fun you can have with your pants on.

em2nought · 06-27-23, 05:39 PM

https://www.insider.com/titanic-sub-...ssenger-2023-6

ET2SN · 06-27-23, 06:27 PM

Quote:

Originally Posted by em2nought

Easy peasy

That depends on which direction you are facing.

Tell the class how the Navy numbers engines and bulkheads.

For extra credit, how does current flow through a circuit?

August · 06-27-23, 07:12 PM

Quote:

Originally Posted by ET2SN

For extra credit, how does current flow through a circuit?

Positive to negative but the electrons that make up current flow from negative to positive. Electricity lives by its own rules.

em2nought · 06-27-23, 07:55 PM

Quote:

Originally Posted by ET2SN

For extra credit, how does current flow through a circuit?

In my experience current flows from the big @ss batteries that we lugged around to the Detroit Diesel's starter. If that worked then it flowed from the alternator back to the batteries usually, unless the T-Boat threw a belt.

I don't remember my YFNB barge/ex ww2 mini sub tender having compartment labels. We didn't have very many compartments.

em2nought · 06-28-23, 07:05 AM

From looking at photos, I think I see those rusty pipe section ballasts attached on the starboard side only.

06-27-23, 12:29 PM	#1
ABBAFAN Commander Join Date: Sep 2001 Posts: 456 Downloads: 0 Uploads: 0	Submersible manoeuvring I was wondering, why is it that submersibles must descend and rose so slowly? I assume they don’t want to hit the bottom too rapidly and of course shooting up to the surface too fast would present problems but I wondered if there are specific reasons. If a submersible has to make an emergency ascent, how fast could this be done? __________________ CHOOSE RFA! LESS GRAFT, MORE PAY.

06-27-23, 05:39 PM	#9
em2nought Ocean Warrior Join Date: Mar 2004 Posts: 3,485 Downloads: 0 Uploads: 0	https://www.insider.com/titanic-sub-...ssenger-2023-6 __________________ em2nought is ecstatic garbage!

06-28-23, 07:05 AM	#13
em2nought Ocean Warrior Join Date: Mar 2004 Posts: 3,485 Downloads: 0 Uploads: 0	From looking at photos, I think I see those rusty pipe section ballasts attached on the starboard side only. __________________ em2nought is ecstatic garbage!

06-27-23, 04:39 PM	#7
Jeff-Groves GLOBAL MODDING TERRORIST Join Date: Sep 2014 Posts: 5,649 Downloads: 137 Uploads: 0	Meh. Easier being a ParaTrooper. Only one direction to remember. DOWN!