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TKMS Type 212CD (Victoria class replacement megathread)

The submarine must first locate a suitable lead or thin patch, manoeuvre beneath it, control depth, trim and heading, arrest its movement, maintain position despite currents and ice drift, and retain the ability to back away and try again if the selected position proves unsuitable. All of that requires propulsion, control authority and available power. So while you don't use momentum, you still need propulsion.

Yes, but not so much propulsion that only a nuclear submarine can do it. Kevin seemed to intimate that only a nuclear boat has enough propulsive power to achieve that, which is not the case.
 
You have now repeated three times that the question should be studied, assessed and debated. Fine. Nobody is arguing that the RCN should refuse to examine future options. What is being challenged is the leap from “perhaps worth studying” to “the RCN is letting down the taxpayer unless it pursues my preferred mobile Arctic AIP filling station.”

And let us stop rewriting the history of Nanisivik. The possible refuelling and support of submarines was always part of the broader potential value of an Arctic naval facility. Nanisivik did not fail because Arctic submarine support was never considered, nor because fixed Arctic support is inherently impossible. It failed because Canada chose a poor location, inherited a bad jetty and then developed the site with almost no long-term vision. Throw in some Covid-19 and there you have it. The original concept was steadily reduced until what remained was little more than a seasonal fuel stop with severe limitations. That is not proof that an Arctic base cannot work. It is proof that a badly located, badly scoped facility built around an inadequate jetty will predictably deliver an inadequate result.

Nor does one former Commander RCN mentioning a mobile support concept magically turn it into an endorsed capability plan. I will let you in on a little secret: senior officers say a lot of things. Some become projects. Some become studies. Some disappear the moment the PowerPoint presentation ends. Everything I have heard suggests an Arctic mobile base ship has not progressed anywhere close to an actual funded program.

You also keep treating “three oceans” as though it means every Canadian submarine must be capable of spending weeks prowling beneath the central Arctic ice pack. It does not. Canada can defend its Arctic approaches, monitor choke points, collect intelligence, support NORAD and NATO operations and operate in seasonally accessible Arctic waters without pretending a conventional submarine is an SSN.

The Arctic Ocean is not a bathtub with only one entrance. Russian submarines crossing under the pole do not suddenly appear unobserved in Hudson Bay. They still have to pass through geographically constrained approaches, which can be monitored by submarines, aircraft, satellites, seabed sensors, surface ships and allied assets. That is called layered surveillance. It is somewhat more sophisticated than parking a hydrogen and oxygen factory on an ice capable barge and hoping for the best.

St. John’s is not necessarily the only option either. Depending on the mission, submarines could operate from or receive support through Halifax, Nuuk, Iqaluit or allied facilities. A future support arrangement in Greenland may make considerably more sense than designing an enormously expensive Canadian mobile base solely to refill AIP reactants during an under ice patrol that may rarely, if ever, be required.

There is also nothing preventing Canada from eventually revisiting the fixed base concept at a better location, with a proper harbour, a suitable jetty, aviation access, storage, maintenance capacity and an actual strategic plan. The lesson from Nanisivik should not be “fixed bases do not work.” The lesson should be “do not build another half-measure in the wrong place and then act surprised when it underperforms.”

How do you know none of those options are already being examined simply because they have not been announced publicly?

The phrase “game changer” is also doing a heroic amount of work here. Replenishing cryogenic oxygen and hydrogen related reactants at sea, in Arctic conditions, alongside a submarine, from a mobile support vessel, would introduce major safety, engineering, certification, training, storage and environmental challenges. The support ship itself would require protection, aviation support, specialized personnel and likely its own escort. At some point the “solution” becomes more complicated and expensive than the operational problem it supposedly solves.

And no, spending tens of billions over the full life of a submarine fleet does not mean every theoretical mission must be supported, regardless of cost. By that logic, unless the submarines can operate under the North Pole, launch satellites, conduct mine clearance and deliver Amazon parcels to Resolute, the taxpayer has somehow been cheated.

Canada needs to manage expectations. Even after the new submarines arrive, it will probably be years before the RCN cautiously expands operations farther into the Arctic, develops procedures, proves equipment and builds crews with the required experience. Nobody sensible is going to take a newly delivered conventional submarine and immediately send it deep beneath the ice simply because a procurement press release mentioned three oceans.

Study it? Certainly. Model it? Absolutely. Conduct limited trials if the engineering case supports them? Perhaps.

Reconsider a properly located and properly designed Arctic support facility? That would make considerably more sense than repeating the mistakes made at Nanisivik. But declaring that the RCN is “letting down the taxpayer” because it has not yet committed billions to an undeveloped, hazardous and possibly unnecessary mobile AIP replenishment concept is not holding the Navy accountable.

It is demanding that the Navy validate your solution before the operational requirement has even been proven.

First let me thank you (and others) for your post disputing the concept of AIP equipped submarine operations in the Arctic. I would like to see this debated, and by the replies/comments, that is taking place.

If I read your post correctly, we have agreement in a few areas:
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(1) AIP equipped submarines, without further logistics support, do not have the capability to patrol the Arctic, nor likely the capability to do a simple coast to coast Arctic transit (at least not at present, if/until global warming makes the Arctic more passable), and
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(2) Trying to replenish an AIP equipped submarine from a mobile (ship) platform is likely incredibly difficult, it probably has not been done by any navy yet, and further, to attempt such in the Arctic would make it even more difficult, (doubly difficult), and
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(3) Regardless, given the potential advantages of being able to replenish AIP reactants from a mobile platform (including an Arctic platform), that it is worth doing a serious study on such a possibility, where I would go a step further perhaps than you would go, and I would note such such an assessment include scaled (down) representative testing to validate such (or to prove such is far too unsafe, if that should be the case).

Where perhaps we disagree, is your characterization of my statements. There was no rewriting the history of Nanisivik. Point to me a document that specifically mentioned AIP reactant replenishment at Nanisivik. I looked. I could not find such ever being proposed. I would like to see such. There is a MASSIVE difference between diesel fuel replenishment and AIP reactent replenishment, and I found no reference to AIP reactant replenishment. So I am interested to read where and if you spotted that.

Second, we seem disagree as to what "three ocean" means in regards to operations. My take on your assessment is the 3rd ocean (Arctic) requirement means the submarine never enters the Arctic (the 3rd ocean), but only at most hovers at two of the choke points to the Arctic. My view is to call that Arctic operations is a massive stretch. I don't know your view there other than you assess stop at choke points to the Arctic. Never have an AIP equipped submarine go past a choke point. Is that your view?

Third, I think we disagree as you seem to believe there are two and only two checkpoints to the Arctic that should be monitored by RCN submarines and the other entrance to Arctic locations can more than adequately be done by aircraft, satellites, seabed sensors, surface ships. If that the case, why don't you also say: "don't bother putting Canadian submarines at any choke point - other assets cover such"? I deduce that by your logic such Canadian Arctic choke points is already adequately covered - no need for Canadian submarines to do such. Having typed that, I believe that is NOT your view, so I don't follow your logic.

And that leads to the fourth disagreement. You stated "And no, spending tens of billions over the full life of a submarine fleet does not mean every theoretical mission must be supported, regardless of cost. By that logic" ... and just whom is that "NO" aimed at?? Where did I claim "every theoretical mission must be supported"? I did not. My view? That is a nonsense reply.

So, ... what did I claim? OK? Lets step back. I pointed out some specific HLMR (which stand for High Level Mandatory Requirements) that are to define the Canadian Patrol Submarine project submarine build. I remind you they are HLMR#2, HLMR#3, HLMR#5, HLMR#6, HLMR#15. Those MANDATORY requirements do not state 'rest silently by an Arctic choke points and never enter'. These are not written "OPTIONAL" requirements. These are not written "CHOKE POINT" requirements.... If you found where such is written, then please point such to me, as I would like to read that.

These are promising and exciting time for the RCN. I think we also agree there. My view is one should not arbitrary block off 3rd ocean (Arctic) access to the chosen Canadian Patrol submarine just because one thinks it is incredibly difficult.

Instead I believe serious consideration be made re: the possibility of Arctic AIP-reactant replenishment be made with a proper assessment, FULLY made and supported if/where possible by accurate scaled repesentative tests conducted, to more accurately assess if reactant replenishment in the Arctic north (including in an Arctic capable supply ship, such as a mobile base ship, or other suitable substantilly size support vessel) can be done.

For if this is possible, despite what I think is your dislike of the words I chose, this would be a game changer. A massive game changer.

Anyway - I do DEFINITELY appreciate your reply, ... Again - thank-you for such ... I appreciate ALL of your counterpoints. I do think this should be debated. It needs discussion. It needs counterpoints. My hope is the idea not shelved and forgotten, but it is given the serious major consideration that it is due.
 
Just to add to your point the USS New Jersey docked at Shearwater this morning. The USN has No posted plans to share with the public obviously .

You got me needlessly excited. lol

The true USS New Jersey

guns missouri GIF
 
We've had Arctic deployments of submarines in the past, reportably including forays under the ice.
I find history interesting ... and I keep wondering more about this. So it was with interest when I read about an O-Boat going under the ice, albeit an RN O-boat and not an RCN O-boat.

So I have since read in 1971, the Royal Navy's Oberon-class diesel-electric submarine HMS Oracle took part in an Arctic research mission in the Fram Strait, between Greenland and Spitsbergen (Svalbard). The deployment was linked to Britain's first under-ice voyage by the nuclear-powered submarine HMS Dreadnought. While Dreadnought continued farther into the Arctic, Oracle carried out scientific work near the edge of the pack ice. Some historical accounts also describe Oracle as providing communications support during the wider operation.

To study the ice, HMS Oracle was fitted with an upward-looking (inverted) echo sounder. As the submarine travelled beneath the ice at a steady depth, the instrument sent acoustic pulses upward and measured the distance to the underside of the sea ice or to the open water between ice floes. These measurements created a continuous record of the ice cover above the submarine.

The same measurements also allowed scientists to study how ocean waves behaved as they travelled into the ice. By analysing the changing distance to the ice, they measured how wave energy decreased beneath the floating ice. During the mission, Oracle made repeated excursions beneath the marginal ice zone. The maximum distance she went under the ice on an excursion is not something I can find on the internet, but I speculate it is a very short distance, possibly a dozen nautical miles or so - and likely a pretty short duration.

From a 'scientific' view ... the results showed that floating sea ice acts as a natural absorber of wave energy. Wave energy decreased rapidly after entering the ice, but not all waves behaved the same way. Short, choppy waves lost their energy much faster than long, slow ocean swells, which were able to travel much farther into the ice-covered region.

Purportedly these measurements provided some of the evidence of how waves weaken as they move through floating sea ice. The findings purportedly improved scientific understanding of wave–ice interactions and I read have been used in later research on sea ice and the Arctic Ocean. Supposedly the work was also of interest to navies operating in polar waters (although there is no evidence that it produced operational formulas that are used for military planning).

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I concede this is a bit off topic - and my apologies for that - but given it was an O-boat, I found it of interest.
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I find history interesting ... and I keep wondering more about this. So it was with interest when I read about an O-Boat going under the ice, albeit an RN O-boat and not an RCN O-boat.

So I have since read in 1971, the Royal Navy's Oberon-class diesel-electric submarine HMS Oracle took part in an Arctic research mission in the Fram Strait, between Greenland and Spitsbergen (Svalbard). The deployment was linked to Britain's first under-ice voyage by the nuclear-powered submarine HMS Dreadnought. While Dreadnought continued farther into the Arctic, Oracle carried out scientific work near the edge of the pack ice. Some historical accounts also describe Oracle as providing communications support during the wider operation.

To study the ice, HMS Oracle was fitted with an upward-looking (inverted) echo sounder. As the submarine travelled beneath the ice at a steady depth, the instrument sent acoustic pulses upward and measured the distance to the underside of the sea ice or to the open water between ice floes. These measurements created a continuous record of the ice cover above the submarine.

The same measurements also allowed scientists to study how ocean waves behaved as they travelled into the ice. By analysing the changing distance to the ice, they measured how wave energy decreased beneath the floating ice. During the mission, Oracle made repeated excursions beneath the marginal ice zone. The maximum distance she went under the ice on an excursion is not something I can find on the internet, but I speculate it is a very short distance, possibly a dozen nautical miles or so - and likely a pretty short duration.

From a 'scientific' view ... the results showed that floating sea ice acts as a natural absorber of wave energy. Wave energy decreased rapidly after entering the ice, but not all waves behaved the same way. Short, choppy waves lost their energy much faster than long, slow ocean swells, which were able to travel much farther into the ice-covered region.

Purportedly these measurements provided some of the first direct evidence of how waves weaken as they move through floating sea ice. The findings purportedly improved scientific understanding of wave–ice interactions and I read have been used in later research on sea ice and the Arctic Ocean. Supposedly the work was also of interest to navies operating in polar waters (although there is no evidence that it produced operational formulas that are used for military planning).

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I concede this is a bit off topic - and my apologies for that - but given it was an O-boat, I found it of interest.
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Are you sure Canadian O-Boats never went under the ice during the cold war and pushed the limits so much they started to brown out under the ice?
 
Are you sure Canadian O-Boats never went under the ice during the cold war and pushed the limits so much they started to brown out under the ice?
I don't know. One either has to have been in the know ... or find such in the press . .... and even if so ... one likely needs public source to quote to prove such. I have not as of yet found any public sources indicating such.

But it is possible. I may bump into some friends who served in O-boats, later next month when I am briefly back in Canada for a class reunion, and I may ask them.
 
I don't know. One either has to have been in the know ... or find such in the press . .... and even if so ... one likely needs public source to quote to prove such. I have not as of yet found any public sources indicating such.

But it is possible. I may bump into some friends who served in O-boats, later next month when I am briefly back in Canada for a class reunion, and I may ask them.
There are many things the O Boats did during the cold war that are still not public knowledge. That's why they're called the Silent Service
 

I asked the question 2 different ways - came up with them operating under the clutter ice, but not pack ice, even with the declassified information available. They'd use the clutter ice as a sonographic camouflage as it were to hide in the noise. The one thing that came up was lack of hardening of the outer hull and sail in case the had to breach, no upward looking sonar.
 
Are you sure Canadian O-Boats never went under the ice during the cold war and pushed the limits so much they started to brown out under the ice?

When looking (for such) I did stumble across this article: HMCS OJIBWA’S PATROL vs A SOVIET DELTA

There was no under-ice transit mentioned there, but the Ojibwa was somewhere in the Labrador Sea southwest of Greenland. The article is interesting .. and it gives an idea as to how conventional submarines may be involved in an 'underwater game of cat and mouse".

Thanks for asking about such, for without your question I would not have looked harder and hence not stumbled across this HMCS Ojibwa patrol article.
 
Sorry, Kevin, but there is no "propulsion ability" required. You raise through ice vertically, from a fully stopped position on buoyancy alone and from a single point of contact: the sail. Note that I said raise, not punch through the ice: you don't use momentum because it is not a collision using speed that breaks the ice.

Fair point for prepared penetration.

But based on some discussions with current and former nuke boat Captains about a hypothetical scenario— if you don’t care about some damage to the boat - you can breach bow up at some speed (neither question of speed or pitch was answered) ‘significantly’ thicker ice in an emergency by sheer force.

Honestly I will say the Submarine service makes JSOC and IC secrecy look amateurish, at an institutional and individual level.





You stop the submarine at the location you wish to surface at, selected because your under ice sonar says it's either open water (it occurs here and there in the ice for a certain amount of time before reclosing, so if you find one, it's the preferred location) or a sufficiently thin and even patch of ice. You then very gently bring the sub up until the top of the sail just touches the ice's underside. At that point, you bring the buoyancy up quickly by blowing the ballasts and buoyancy is the force that raises and breaks the ice to surface.

Since buoyancy is related directly to the displacement differential between a neutrally buoyant boat and a surfaced boat, the smaller the displacement on the surface compared to the one in neutral, the more buoyancy force can be generated by the submarine.

In fact even the French nuclear submarines, which are smaller than the US and UK ones, cannot break Arctic ice and thus don't attempt it. Because of that, when Canada considered the nuclear boat option under PM Mulroney's White paper, the French offered to add to their boat an Ice Pick mast to the various things you can raise from the sail so that all the generated force could be concentrated on a single point and make it possible to break through the ice on a much smaller displacement differential (never deride the French for lack of imagination).
Interesting on the the French SSN. France’s SSBN fleet does conduct ice breaching — I assume for missile launch situations.



Now I have found some papers on emergency ice penetration of multi-year ice in excess of 20’ , using air from the ballast tanks to make a bubble and then torpedo to a breach point.
I am guessing it is mostly theoretical, as having done some minor ice blasting, I can only imagine what a Mk48 type torpedo would do under the ice, and the ice shards would be potentially a very dangerous situation

That said, if the only other option is a guaranteed death, the mad man option is not so mad.
 
When looking (for such) I did stumble across this article: HMCS OJIBWA’S PATROL vs A SOVIET DELTA

There was no under-ice transit mentioned there, but the Ojibwa was somewhere in the Labrador Sea southwest of Greenland. The article is interesting .. and it gives an idea as to how conventional submarines may be involved in an 'underwater game of cat and mouse".

Thanks for asking about such, for without your question I would not have looked harder and hence not stumbled across this HMCS Ojibwa patrol article.
I read a similar account of that patrol elsewhere...and IIRC, once the Victor III was detected, in the version I read, they had a MK 37 tubed and readied in case they were more seriously pursued/prosecuted, which I'm sure would have added to the tension of the tracks they were doing.
 
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