Invisible Force Sinks Sub

[double u]

Originally Posted by AndyEss

Polar Opposite - thank you for your service Sir.

The depth of persons on our Forum is outstanding.

agree 100%, always great to see!

[double u]

Originally Posted by captainjim47

Clue #1. Any posting that uses the word invisible as an adjective for the word wave is b.s. Any "wave" capable of exerting any "force" is definable, unless you "believe" science is something that can be arbitrarily "believed in" or not...

@b.s., Sir: interesting, that you see radiowaves etc...tell us more about it!
(the bandwidth of "knowledge" here is truely astonishing!)

[RaymondR]

Originally Posted by StuM

Some are planning to build new ones - and not just for coastal defence
https://en.wikipedia.org/wiki/Attack-class_submarine

Unfortunately this is probably going to be one of our biggest defense screw ups.

In my opinion we should have evolved the diesel electric Collins class subs with an ongoing build and evolve program and bought six French nuclear subs rather than redesigning nuclear subs as diesel electric. There's nothing wrong with French defense technology and we would have then had both good long range, deep ocean and coastal defense subs.

[SeanPatrick]

FYI:

[StuM]

Originally Posted by SeanPatrick

FYI:

"Total pressure" is a total misnomer. Pressure is pressure, regardless of area and is not measured in pounds. What that graph illustrates is Force.

[Alan Mighty]

Koh Swee Lean of the Institute of Defence and Strategic Studies (at Nanyang Technological U in Singapore) argues the incident with KRI Nanggala demonstrates the need for Indonesia, and any navy operating submarines, to invest in infrastructure including emergency response capacity.

In the western Pacific, Koh reports only China, Japan, Republican Korea, Australia, Singapore, Malaysia, and Viet Nam have emergency response capacity.

Indonesia and Viet Nam have each signed agreements with Singapore for submarine emergency response. Distance and time are crucial factors. Viet Nam now has its own submarine rescue vessel.

See: https://www.channelnewsasia.com/news...ggala-14697638

[SeanPatrick]

Originally Posted by StuM

"Total pressure" is a total misnomer. Pressure is pressure, regardless of area and is not measured in pounds. What that graph illustrates is Force.

Apologies. I wanted to convey that it was not just the PSI, but I guess I didn't know the right term. Thank you.


EDIT: How's this?

[El Pinguino]

Invisible forces? I'm guessing they would be the watery equivalent to wind shear and microbursts.
Speaking of which you don't see 'drop bear ' rachas - as opposed to 'line rachas' - coming.

German submarines? The Argentines lost one in mysterious circumstances in '17 or '18. A bit younger than this one.

[Cadence]

Originally Posted by Alan Mighty

Perhaps.

It does not change the facts that it was (1) an old boat, well past its use-by date; and (2) overloaded with personnel.

So the solitary wave story is a convenient way to shift the blame, nicht wahr?

I would just about have to agree with this. Shift the blame.

[sinnerman]

It sounds like the work of...

Godzilla

[lestersails]

Originally Posted by Woodland Hills

Every $ spent by China countering Indonesia’s diesel boats is a $ that cannot be spent elsewhere......

And every $ spent by us on Chinese products generates more $ China can spend to dominate countries like Indonesia. If you have a choice - don't buy Chinese.

[chasmains]

True. Diesel electric boats are still being built. They have a small advantage over nucs. They can be VERY quiet on the battery. The Soviet Foxtrots were always a threat to us in the old days. Slow but really quiet. Many were sold to other countries everywhere. Other countries build (and sell) them now.
And welding is far superior to riveted seams. In the Navy, submarine hulls and all their stiffeners are welded. Hull material was HY-80 steel over an inch thick. Newer boat may have later innovation steel. All hull weldings are inspected using radioactive sources to see inside those welds. Super strong with the stiffeners inside.

[besty1950]

Such waves do exist, and when studying for a for a DP (Differential Positioning) Certificate candidates are made aware of their existing???.

[boatman61]

Originally Posted by sinnerman

It sounds like the work of...

Godzilla

Naah... Nessie was there on vaction..

[LakeSuperior]

Of interest in the article is the concept of large scale currents with a vertical component sufficient to carry a sub to a crush depth. Do currents of this scale exist and are they a result of tidal deep ocean tidal current and geography? Does the US Navy worry about such a phenomenon?

I have read accounts of divers being forced deep by currents near seamounts and islands. Several divers have been lost through the years because of these currents. However, as a great lakes diver this type of risk is not on the list.