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Type 218SG, at 2000 tonnes surfaced, is closer to Type 212 (1500 tonnes) than to Type 216 (projected to be 4000 tonnes). Type 216 is just a kind of "preliminary design", double the size of whatever boat TKMS has built before. This would actually be a customized design. Just think of how the...

Thanks for the input. Certainly if brute power is needed, AIP does not provide it. Might batteries be used instead? they could provide peak currents for some time, especially since, once emerged, diesel gens would recharge them. I agree with the ability to surface in case of emergency as a...

I feel great today, my enthusiasm is bulletproof, don't worry at all. :LOL: 🍻 But, naiveness apart, there are few options left: Discard Japan: their boats are designed for a life-span of 15-20 years, ... not for the RCN discard South Korea and Italy (sure?) since their designs are tributary...

I may be wrong but also believe that safety is the main reason to surface, followed by need for communications (send data collected, receive orders), by the amazing view of the plain frozen sea (in peace time) and by chance to capture some snaps of polar bears 😁 A customized design. Well...

Not being an expert, from the technical point of view I see two issues for that: First, breaking through Arctic ice should be a problem of buoyancy and reinforced hull. Probably not a big tech. problem for oceanic submarines of about 4,000 tonnes and above. Secondly, patrolling the Arctic for...

Well, i don't think 4-6 boats would be ideal, and probably i'm not alone on this. IIRC there was a parliament recommendation for twelve, which i admit may be too much in terms of costs (purchasing and operating) and manning. would be nice to have at least 10: three per ocean and one under...

A notional Arctic amphibious ship to deploy some 200-300 troops should probably 'recover' [ from the Blue Ridge class ] those cantilever (protruding) davits in order to accommodate not only 3-4 landing craft (LCVPs?) but some SOLAS compliant lifeboats as well, ... I guess.

Excuse my curiosity regarding fuel constrains in the north: Ethanol's freezing point is much lower than marine fuel's, probably would not require heating to keep it liquid, and water diluted in it should not affect performance of a fuel cell. Ottawa University is making some progress in direct...

Back to submarines... Israeli Dolphin caught gathering intelligence near Algerian coast. https://www.menadefense.net/algeria/what-we-know-about-the-incident-with-an-israeli-submarine/

I was not so bad guessing... https://www.navaltoday.com/2021/09/23/australia-in-talks-to-lease-buy-existing-subs/

Since JT showed no interest in joining this SSN procurement, there might be still an option to join (at some level) the program and strengthen Canadian nuclear industry, despite not purchasing any boat in the beginning. Somehow alike the F35 program. It would be interesting to gain access to...

If we take a read to ASPI... " The officials said such a technology transfer was unlikely to happen again. ‘This technology is extremely sensitive. This is, frankly, an exception to our policy in many respects. I do not anticipate that this will be undertaken in other circumstances going...

Latest news on Australian submarine program... Australia confirms ‘historic’ nuclear deal with the US and UK https://www.navylookout.com/royal-navy-nuclear-submarine-technology-to-be-shared-with-australia/

That may be fine as for the RCN sub capability. However i feel i didn't adressed my point. I referred to the "building subs capability" itself, since IMO it's a different capability to building surface vessels. Let's take (grossly) ten years to deliver the first boat. Then one more every two...

There's a factor to consider: number of boats to build. The capability for locally building the subs may be worth for 12 boats, but... what may be the minimum number of boats to make it worth? Note that the capability is going to cost tens of billions to Australia.

(In response to the second post above this) Totally agree, was thinking of that after my post. Thank you. 🍻

The reinforced hull to deal with the ice may have misled you. A typical non-Arctic of-shore patrol vessel of similar dimensions (length and beam) as the AOPS would displace half or even one third than the AOPS. Steel is cheap but its cost is weight, hence displacement to keep floating. The...

On one side, I would keep an eye also on Navantia's S-80. With 40+ berths, apparently designed for three 12-men guard shifts, 50 days endurance, US-based combat system and up-to-date sensors, 3x1.2 MW DGs for a fast charge of batteries and first unit already in the water (still being fitted but...

Assuming next submarines will not be nuclear, they would at least be AIP. Two technologies are available for long underwater patrols: Stirling engines (mainly Sweden, China & Japan under Swedish license) and fuel cells (Germany and their derivatives: Norway, Italy, South Korea). Battery systems...

Let me reply one point after another... Arafura class looks nice, however her short-legs (4000 nm, 21 days) and diesel propulsion do not tick the boxes. As far as it's based on Lurssen OPV-80, going one step beyond to OPV-85 would add hangar, electric drive and maybe higher endurance at the...