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Convoys always have and always will have more than 1 escort,
Ideally yes, but historically than hasn't always been the case, cf HMS Jervis Bay vs Admiral Scheer, and MV Ondina and HMIS Bengal vs Hokoku and Aikoku Maru. And while the operations in the Bab el Mandeb technically aren't convoy operations the Western warships there have often been acting independently of each other.
 
Ideally yes, but historically than hasn't always been the case, cf HMS Jervis Bay vs Admiral Scheer, and MV Ondina and HMIS Bengal vs Hokoku and Aikoku Maru. And while the operations in the Bab el Mandeb technically aren't convoy operations the Western warships there have often been acting independently of each other.
It’s not ‘it technically wasn’t convoy operations’ it was flat out not a convoy operation. There was nothing resembling a convoy operation from the western navies.
 
It’s not ‘it technically wasn’t convoy operations’ it was flat out not a convoy operation. There was nothing resembling a convoy operation from the western navies.
That's not the point, the point is the engagement geometry in the Bab el Mandeb is pretty much exactly that we'd see for an escort protecting a convoy against a pop-up missile attack. Sometimes the geometry will work for you, sometimes it won't.

As the engagements against the Houthis have shown, a warship doesn't need to be in a formal convoy to find itself protecting merchantmen from missile attack. For a similar case, see also USN operations during the Tanker War in general and the attack on the USS Stark in particular.
 
That's not the point, the point is the engagement geometry in the Bab el Mandeb is pretty much exactly that we'd see for an escort protecting a convoy against a pop-up missile attack. Sometimes the geometry will work for you, sometimes it won't.

As the engagements against the Houthis have shown, a warship doesn't need to be in a formal convoy to find itself protecting merchantmen from missile attack. For a similar case, see also USN operations during the Tanker War in general and the attack on the USS Stark in particular.
I mean it does make a difference especially if long range SAMs aren’t in play.
 
After awarding the contact to Fincantieri NAVSEA continuously changed / modified the design over five years even though Fincantieri had met the Navy RFP so now it has less than 15% commonality with the original parent Italian FREMM.
Do you have any actual source for NAVSEA “continuously changing the design over 5 years?” I glanced through the March 2025 GAO report and can’t find anything suggesting that to be the case.
 
I'm looking at this from a British perspective, where 'local area air defence' means the 25km range, Mach 3 CAMM, which was apparently a great success defending cargo ships in the Red Sea with 32 per Type 23.
Type 26, with roughly equivalent VLS (more but shorter range missiles) is considered a great leap forwards and the limited mk41 is not supposed to be a problem because a cruise on which you fire 8 anti-submarine missiles is a near-apocalyptic scenario (upthread someone suggested that Constellation won't have VL-ASROC anyway). Similarly, Type 26 will rely on the (admittedly superior) Merlin helicopter for actually killing subs.
If America wants two tiers of destroyers then say so and base your second tier of the F110 or some of the Japanese Akizuki class, rather than buying a specialist ASW frigate and trying to shoehorn a destroyer into it. That sort of thing breaks programmes, as the Australians nearly found with the Hunter class.
To start I think people get too caught in the meaningless classifications like destroyer or frigate.

The US unfortunately wants a ship that will be less capable than a burke overall while still somehow being top of the line. The only real way for that to happen is expensive ass SPY radar arrays and a good sonar set up, and fewer VLS.
I agree that’s a stupid way to go.
We need a ship with a cheaper radar than SPY-anything mk-whatever.

Not sure why anyone would believe the ships wouldn’t carry ASROC….

I was a GM so SOPs for engaging subs aren’t my forte, but I find it hard to believe that it wouldn’t be pretty standard to salvo at least 2 or 3 ASROCs at an enemy sub. They have decoys and things sometimes just fail, and if you sink one sub 1/5 of the way crossing from Hawaii towards Taiwan, there’s a lot of ocean left to need to engage other subs potentially, still more ocean to need to engage a third, and then possibly a fourth once you’re actually near Taiwan. So 8 seems like a bare minimum, I’d want 10-12 to feel more comfortable.
12 cells for ASROC leaves only 20 cells for TLAM and SAMs, luckily convoy escorts would likely rely on ESSM mostly, so that could quite easily be 48 ESSMs and a handful of SMs, and then a few TLAMs if you only have 32 cells.

Have you ever heard of any one in any conflict saying they wish they had less weapons to shoot, or less ammo to shoot at the bad guy when the fight started? I haven’t, so I don’t think asking for at least 48 cells on a ship that’s more than 7k tons approaching 8k and nearly as long as some Burkes is asking that much.
 
If America wants two tiers of destroyers then say so and base your second tier of the F110 or some of the Japanese Akizuki class, rather than buying a specialist ASW frigate and trying to shoehorn a destroyer into it. That sort of thing breaks programmes, as the Australians nearly found with the Hunter class.
The problem is that the modern ASW threat includes things like Oscars and Yasens. Plus Type 095s from the PLAN and Type 75 Alpha/Type 77s from the Indians.

A single Oscar-M is capable of throwing 72x P800 Onyx or 3M54 Kalibr. A Yasen is throwing 32x Onyx or Kalibr.

So now you need pretty significant AAW defenses even if the class is supposed to be a predominantly ASW asset.

And this is ignoring the Red Sea Turkey Shoot, which could be remapped to half a dozen other areas. Not least the Straits of Malacca!

====================

The modern threat profile really just has that much of a missile threat!
 
I forget if it’s France or Italy, but one of them doesn’t even use the classification of destroyer because it’s technically a shortening of torpedo boat destroyer, and their top end ships are not intended to fight torpedo/missile boats as their main function.
Just to clarify the nomenclature, the torpedo boat in torpedo boat destroyer does not refer to MTBs/PTs/PTGs, but to Victorian/WWI/WWII era ocean-going torpedo boats, which were a form of small destroyer (or rather, TBDs were form of large torpedo boat). All the German 'destroyers' at Jutland were actually hochseetorpedoboote (high seas torpedo boats), with the first significant German 'destroyer' class not really appearing until the 1918(Mob) Type, and even they were Grossestorpedoboote, not Zerstorer. The WWII German Type 1939 Flottentorpedoboot (aka Elbings) came in at 1,200t.

The inter-war French moved their whole terminology up a step by calling their destroyers torpilleurs (ie torpedo boats) and then building a series of very large destroyers/fleet scouts as contre-torpilleurs (which translates as torpedo boat destroyers), so French usage has been out of step with everyone else for a long time.

The modern equivalent to 'torpedo boat' is going to be corvette or frigate.
 
Just to clarify the nomenclature, the torpedo boat in torpedo boat destroyer does not refer to MTBs/PTs/PTGs, but to Victorian/WWI/WWII era ocean-going torpedo boats, which were a form of small destroyer (or rather, TBDs were form of large torpedo boat). All the German 'destroyers' at Jutland were actually hochseetorpedoboote (high seas torpedo boats), with the first significant German 'destroyer' class not really appearing until the 1918(Mob) Type, and even they were Grossestorpedoboote, not Zerstorer. The WWII German Type 1939 Flottentorpedoboot (aka Elbings) came in at 1,200t.

The inter-war French moved their whole terminology up a step by calling their destroyers torpilleurs (ie torpedo boats) and then building a series of very large destroyers/fleet scouts as contre-torpilleurs (which translates as torpedo boat destroyers), so French usage has been out of step with everyone else for a long time.

The modern equivalent to 'torpedo boat' is going to be corvette or frigate.
No, the torpedo boat in torpedo boat destroyer was not specifically about ocean going torpedo boats. Besides ocean going torpedo boats of the late 1890s were still extremely small. The US’s first torpedo boats even ocean going were roughly 80-100ft in length. A Higgins PT boat was 78’ ft long. Not like the difference is massive in size. Displacement might be massively different considering steel/iron construction vs wooden construction.

The modern equivalent of a torpedo boat is a FAC…not a corvette. A corvette/corvette like ships (LCS, LMS) is the modern equivalent of a torpedo boat destroyer.

These are the modern torpedo boats



These are modern TBDs





And an example of a Victorian TBD



Typically twice the size of contemporary torpedo boats.
 
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Besides ocean going torpedo boats of the late 1890s were still extremely small.

Yes, but by WWI they were several hundred tons, and by WWII over a thousand, with MTBs and PTs slipping in below them as a new form of very light torpedo craft. In WWII we saw the evolution of the sub-destroyer sized warship into the defensive corvette/frigate/DE rather than the offensive torpedo boat, while the smaller craft morphed postwar to include the FAC(M), though the FAC(T) never quite went away. There's three distinct types there, though their roles have changed over time
 
I believe that you're much better off using mission and capabilities, not size.

Frigate: small ship intended for operations off by itself, commerce protection, anti-piracy missions, etc.
Destroyer: small ship intended for supporting fleet elements.
Cruiser: large ship intended for either operations off by itself (or as the command ship for operations not needing battleships) or for supporting fleet elements.
battleship: what it says on the tin, the primary fighting ship of the fleet. (Which for the current time means carriers, but that's a separate discussion)
In modern times All ships can be multimission.
 
In modern times All ships can be multimission.
Most of the time, when people say "multimission ship" they're talking about AAW or ASW or ASuW, the primary threat the ship is intended to face. Not what the ship is supposed to be doing at a higher level, or how much help it's supposed to have while doing that job. Not "this ship is intended to be off by itself so it needs greater fuel, stores and spares capacity than a ship that is intended to be operating as part of a fleet with a supply ship right there."

Also, the modern ASW threat has enough missiles that an "ASW escort" needs to have some pretty competent AAW capabilities. Hence SPY6 and Aegis on the Connies.

==================================

So, a Frigate. Intended for operations mostly off by itself, commerce protection, anti-piracy, convoy escorting, etc.
  • Needs a long unrefueled range.
  • Needs enough food stores to cover at least 90 days underway between pit stops, more is better.
  • Needs a machine shop and enough spare parts to stay fully functional at least 90 days between pit stops.
  • Needs a sick bay with xray capability, and possibly a surgeon onboard.
  • Convoy protection means a helicopter is a good idea (I mean, a helicopter should be mandatory for all ships these days), and since the ship is intended to be off by itself we need two plus a hangar for them, as well as all the spare parts that they need for 90+ days away from their usual support.
  • Anti Piracy means a couple of RHIBs and space for either a MARDET or a Coast Guard LEDET, or both.
Notice I haven't mentioned weapons or sensors yet, except for the helicopters.

In comparison, a Destroyer. Intended for operations as part of a fleet, and supporting other, larger ships.
  • Will be refueled every week or so from the fleet oilers
  • Has a supply ship steaming with the fleet, so doesn't need 90+ days of food
  • Has a supply ship close by, so doesn't need all the spare parts, just those commonly used week-to-week
  • Has a bigger ship close by, so doesn't need a surgeon onboard, or even the xray machine(s).
  • Still needs a helicopter for SAR etc, but may not need 2 or even have a full hangar for them. Doesn't need all the space for helicopter spare parts or maintenance, either, since it will be operating with a carrier that has all that stuff onboard.
  • No need for a MARDET or LEDET, but will need a couple of small boats for general use.
 
Most of the time, when people say "multimission ship" they're talking about AAW or ASW or ASuW, the primary threat the ship is intended to face. Not what the ship is supposed to be doing at a higher level, or how much help it's supposed to have while doing that job. Not "this ship is intended to be off by itself so it needs greater fuel, stores and spares capacity than a ship that is intended to be operating as part of a fleet with a supply ship right there."

Also, the modern ASW threat has enough missiles that an "ASW escort" needs to have some pretty competent AAW capabilities. Hence SPY6 and Aegis on the Connies.

==================================

So, a Frigate. Intended for operations mostly off by itself, commerce protection, anti-piracy, convoy escorting, etc.
  • Needs a long unrefueled range.
  • Needs enough food stores to cover at least 90 days underway between pit stops, more is better.
  • Needs a machine shop and enough spare parts to stay fully functional at least 90 days between pit stops.
  • Needs a sick bay with xray capability, and possibly a surgeon onboard.
  • Convoy protection means a helicopter is a good idea (I mean, a helicopter should be mandatory for all ships these days), and since the ship is intended to be off by itself we need two plus a hangar for them, as well as all the spare parts that they need for 90+ days away from their usual support.
  • Anti Piracy means a couple of RHIBs and space for either a MARDET or a Coast Guard LEDET, or both.
Notice I haven't mentioned weapons or sensors yet, except for the helicopters.

In comparison, a Destroyer. Intended for operations as part of a fleet, and supporting other, larger ships.
  • Will be refueled every week or so from the fleet oilers
  • Has a supply ship steaming with the fleet, so doesn't need 90+ days of food
  • Has a supply ship close by, so doesn't need all the spare parts, just those commonly used week-to-week
  • Has a bigger ship close by, so doesn't need a surgeon onboard, or even the xray machine(s).
  • Still needs a helicopter for SAR etc, but may not need 2 or even have a full hangar for them. Doesn't need all the space for helicopter spare parts or maintenance, either, since it will be operating with a carrier that has all that stuff onboard.
  • No need for a MARDET or LEDET, but will need a couple of small boats for general use.
a Frigate. Intended for operations mostly off by itself, commerce protection, anti-piracy, convoy escorting, etc.
Yeah about that, not everybody uses the ship they classify as frigates for " for operations mostly off by itself, commerce protection, anti-piracy, convoy escorting, etc."

And not everyone uses the ships their respective navy's categories as destroyers "for operations as part of a fleet, and supporting other, larger ships."

French fremm class frigates, eg. FS.Provence
Is a multirole ship( ASW,AAW, AsuW) designed to compliment French carrier group as part of a fleet.
Type 23 frigates of Royal navy were primary designed to escort carrier group as part of a fleet and specialized in ASW, bur later other capabilities were added.


Indian, Kolkata&Visakhapatnam class "Destroyers", while can be used in escort role but were primarly designed to act as independent ships, with their strong anti ship capability, and decentish anti air and anti sub capability.
 
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Type 23 frigates of Royal navy were primary designed to escort carrier group as part of a fleet and specialized in ASW, bur later other capabilities were added.
The Type 23s were actually designed around independent ASW operations in the GIUK Gap.
 
The Type 23s were actually designed around independent ASW operations in the GIUK Gap.
Checked, my fault.
It's the current type26 frigates in construction that are designed to support carrier group, along with it's primary ASW role.
 
Modern " destroyers" 15k tons, 13ktons.

I consider them to be cruisers tho.

For me a destroyer is ships like.
Type 45 of Royal navy.
Chinese type 052D.
Indian Kolkata class.

Japanese, kongo, atagi, Maya class ships to be large destroyers/almost cruiser sized ships/ barely cruisers.
Basically transitional size between destroyer and cruiser.
What you consider them is 100% irrelevant because you’re no body.
You could consider them battleships or aircraft carriers and it wouldn’t matter.
 
I believe that you're much better off using mission and capabilities, not size.

Frigate: small ship intended for operations off by itself, commerce protection, anti-piracy missions, etc.
Destroyer: small ship intended for supporting fleet elements.
Cruiser: large ship intended for either operations off by itself (or as the command ship for operations not needing battleships) or for supporting fleet elements.
battleship: what it says on the tin, the primary fighting ship of the fleet. (Which for the current time means carriers, but that's a separate discussion)
Terms like small, are very subjective though, and your system is still primarily reliant on size of the ship.

Sensors and number of battle force missiles a ship can be expected to carry should be the way ships are classified in the modern world.

A 10k ton ship, with 32 VLS, mid tier radar and sonar, but able to carry 2 medium lift helos, 3 light helo drones, and 2 small-medium UUVs would imo be a helicopter frigate.

A 6k ton ship with high end radar mid to low tier sonar and 80-100 VLS would be a destroyer.

A 10k ton ship with high end radar, sonar, and flag facilities, with 80+ VLS should be a cruiser.

Ships with less than 24VLS and low-mid tier sensors over 2k tons would fall into one of various surface warfare classifications like corvette, LCS, etc.

Ships armed with offensive missiles under 2k ton, FAC/FIAC.

Ships designed for laying mines, minelayer.
Ships designed for clearing mines, mine hunter/sweeper.

Sensor quality would be the only subjective part of these classifications.
 
Cruisers effectively don't exist (even the Ticonderogas and all of the CGNs sans Long Beach were originally classified as destroyer type ships).
The Pyotr Velekiy/Admiral Nakhimov (I dunno which one is currently active) is arguably the only proper cruiser currently active. The future Japanese ASEVs may be considered cruisers.
 
What makes them proper cruisers?
That they're deliberately designed to act as large, high endurance, ABM platforms. I wouldn't be surprised if they had dedicated flag facilities to coordinate sea and land based missile defense efforts.

Which sets them apart from the smaller, multimission oriented destroyers of the JMSDF. And generally speaking, following the extinction of the battleship, the largest and most heavily armed surface combatants are referred to as cruisers (Ticonderoga is one such example, being a heavily armed air defense cruiser which is usually in charge of the AAW capabilities of an entire battlegroup, in the USN at least). And the ASEVs fit that description for Japan. As they're large, heavily armed and would act as commanding vessels for ABM efforts, due to their formidable battlesystems and most likely also having flag facilities.

And yes, also because they're just very big.

All in all, ship classifications don't make much sense today, there is no unified internationally recognized guideline (I would welcome such a thing, but it's just not important politically speaking) and it all comes down to semantics and general trends. If the US wanted, they could just call the Zumwalts corvettes. At the end of the day it's semantics for enthusiasts to argue over online, like we do. In the real world it doesn't matter if you call a Type 055 a destroyer or a cruiser. Or if you call Kaga a destroyer, LHD or small CV.
 
That they're deliberately designed to act as large, high endurance, ABM platforms. I wouldn't be surprised if they had dedicated flag facilities to coordinate sea and land based missile defense efforts.

Which sets them apart from the smaller, multimission oriented destroyers of the JMSDF. And generally speaking, following the extinction of the battleship, the largest and most heavily armed surface combatants are referred to as cruisers (Ticonderoga is one such example, being a heavily armed air defense cruiser which is usually in charge of the AAW capabilities of an entire battlegroup, in the USN at least). And the ASEVs fit that description for Japan. As they're large, heavily armed and would act as commanding vessels for ABM efforts, due to their formidable battlesystems and most likely also having flag facilities.

And yes, also because they're just very big.

All in all, ship classifications don't make much sense today, there is no unified internationally recognized guideline (I would welcome such a thing, but it's just not important politically speaking) and it all comes down to semantics and general trends. If the US wanted, they could just call the Zumwalts corvettes. At the end of the day it's semantics for enthusiasts to argue over online, like we do. In the real world it doesn't matter if you call a Type 055 a destroyer or a cruiser. Or if you call Kaga a destroyer, LHD or small CV.
There isn’t even standardized definitions in most navies for their own ships afaik.
 
Terms like small, are very subjective though, and your system is still primarily reliant on size of the ship.
My use of "small" is supposed to be subjective.

A frigate or destroyer is smaller than a cruiser. That's it. That's the only use of it.

If you get down to it, a cruiser is intended to do both Frigate (off by itself) missions as well as Destroyer (fleet escort) missions, in the same hull. So you need the large fuel tanks etc of a frigate, plus the difference in weapons that a destroyer carries over a frigate in place of those fuel tanks etc, plus flag command space for either the other frigates in the convoy/commerce protection mission or AAW for the fleet mission.


Sensors and number of battle force missiles a ship can be expected to carry should be the way ships are classified in the modern world.
That may not be a bad argument.
 
My use of "small" is supposed to be subjective.

A frigate or destroyer is smaller than a cruiser. That's it. That's the only use of it.

If you get down to it, a cruiser is intended to do both Frigate (off by itself) missions as well as Destroyer (fleet escort) missions, in the same hull. So you need the large fuel tanks etc of a frigate, plus the difference in weapons that a destroyer carries over a frigate in place of those fuel tanks etc, plus flag command space for either the other frigates in the convoy/commerce protection mission or AAW for the fleet mission.



That may not be a bad argument.
It definitely isn’t a bad argument.
It’s the only option I’ve heard that actually make sense.
 
Honestly the daegu class might not have been a bad option. Tbh
Already has an S band radar (though rotating) admittedly not a radar nerd, but I assume since SPY is also an S band, it’s likely a solid air search.

$330m for 16VLS.
Remove the ASMs might be able to fit 8-16 more.
If my math is accurate you could get 7 for the price of 1 burke, and still have some money left over.
16x7=112

Let’s assume it would be more expensive for us.
600x4=2400. So 600m we could still get 4 for the price of a burke with some left over and total of 64 VLS added to the fleet.

That’s still roughly 2 daegus for the price of one Connie, and the same number of VLS added to the fleet.

It’s clearly a smaller ship than a burke (modern frigates typically being much smaller than destroyers.)
 
Because starting a second hull when the design isn’t even finalized is stupid, especially as the costs seem to be ballooning.
Iirc they were supposed to be like $8-900m but now they’re all like $1.5b+ iirc an article said the 7th ship was going to be around $1.7-1.8b

Our biggest short coming as a fleet is simply raw numbers. We don’t have the ships to escort our MSC and merchant ships…$1.5-1.8b per hull isn’t going to get us the numbers we need to do that let alone provide ships to fill out battle groups, or do independent missions…
Modern merchies cruise at 20+ knots, though.

That makes them fast enough to be survivable versus subs as solos. No need to convoy up.
 
Modern merchies cruise at 20+ knots, though.

That makes them fast enough to be survivable versus subs as solos. No need to convoy up.
Did see for 2018 vehicle carriers were the fastest merchant ships averaging at 14.95 knots, second container ships 14.2 knots, anyone have more up to date figures.
 
Modern merchies cruise at 20+ knots, though.

That makes them fast enough to be survivable versus subs as solos. No need to convoy up.
According to wiki china’s type 094 can do 30kts submerged….

And what are merchant ships supposed to do about aircraft or surface ships?
 
As we have seen in the Red Sea and other places, merchant ships still require escorting when the environment turns hostile.

Indeed, we are now seeing Russia trying to escort it's shadow tankers.

How that's done might change over time but that mission with continue.
 
According to wiki china’s type 094 can do 30kts submerged….
And can't hear a damn thing at that speed.

Flow noise washes out your sonar at about 20 knots.



And what are merchant ships supposed to do about aircraft or surface ships?
If they're scattered, any given aircraft or skimmer will only engage one merchie.
 
Modern merchies cruise at 20+ knots, though.

That makes them fast enough to be survivable versus subs as solos. No need to convoy up.

Indeed, 20 kts is considered to be a small cruise for a large container ship.

BUT this doesn't make them survivable on their own.
They can be detected, identified as what they are and tracked over very long distances with a submarine sonar and an SSK would be able to block a frontage of more than 50 nmi on its own without resorting to the use of missiles, just with heavyweight torpedoes.
A SSN would likely be able to block much more in deep water without moving fast enough for making cavitation noises.

Any unarmed and not protected container ship would also be vulnerable to boarding by auxiliary cruisers' helos, to simple bomb attacks by aircraft, to naval mines, to land-based artillery, to all kinds of missiles and to any fast-enough OPV.
 
Indeed, 20 kts is considered to be a small cruise for a large container ship.

BUT this doesn't make them survivable on their own.
They can be detected, identified as what they are and tracked over very long distances with a submarine sonar and an SSK would be able to block a frontage of more than 50 nmi on its own without resorting to the use of missiles, just with heavyweight torpedoes.
A SSN would likely be able to block much more in deep water without moving fast enough for making cavitation noises.

Any unarmed and not protected container ship would also be vulnerable to boarding by auxiliary cruisers' helos, to simple bomb attacks by aircraft, to naval mines, to land-based artillery, to all kinds of missiles and to any fast-enough OPV.
Convoy escort has an interesting future, it might benefit from USVs more than the surface action groups. Could see a convoy being escorted by a single frigate or destroyer but with six, eight or more USVs both with and ranging ahead and wide of the convoy. Should have sufficient sensors and munitions available to protect the cargo and if combined with buoy or dipping sonar deploying UAVs they should provide great sub surface protection.
 
And can't hear a damn thing at that speed.

Flow noise washes out your sonar at about 20 knots.




If they're scattered, any given aircraft or skimmer will only engage one merchie.
Once you know where they are you don’t need to hear them constantly. Without escorts no reason not to sprint for an hour or two, slow for a listen, sprint, etc.

So you think in the era of radar, aircraft, and guided munitions raiders will be less successful than they were before the invention of radar?

China’s maritime militia can be armed before they start a war with drones, loitering munitions, and HMGs or small caliber cannons, mines, missiles.

China has a massive fleet of potential raiders ready to go at any time. They may not even necessarily need to pull in to ports to be armed with some of these weapon systems.
 
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Indeed, 20 kts is considered to be a small cruise for a large container ship.

BUT this doesn't make them survivable on their own.
They can be detected, identified as what they are and tracked over very long distances with a submarine sonar and an SSK would be able to block a frontage of more than 50 nmi on its own without resorting to the use of missiles, just with heavyweight torpedoes.
A SSN would likely be able to block much more in deep water without moving fast enough for making cavitation noises.

Any unarmed and not protected container ship would also be vulnerable to boarding by auxiliary cruisers' helos, to simple bomb attacks by aircraft, to naval mines, to land-based artillery, to all kinds of missiles and to any fast-enough OPV.
I think the biggest threat would be loitering munitions.
Cheap (relatively) effective, etc.
 
Big cargo ships are amazingly difficult to destroy unless
- heavyweight torpedo hit
- big naval mine hit
- big bomb with delay fuse explodes under the hull
- out of control fires onboard

I do suppose that cargo ships abort mission when they get serious hits well short of full destruction, though.

Furthermore, it should be rather easy to take out the main rudder of a cargo ship and a destruction of the bridge is super easy.
 
Convoy escort has an interesting future, it might benefit from USVs more than the surface action groups. Could see a convoy being escorted by a single frigate or destroyer but with six, eight or more USVs both with and ranging ahead and wide of the convoy. Should have sufficient sensors and munitions available to protect the cargo and if combined with buoy or dipping sonar deploying UAVs they should provide great sub surface protection.

Small vehicles cannot combine long range with high speed and high mission systems power consumption.
That's why you need big hulls. Even a 10,000 ton escort is rather small for a transoceanic convoy of container ships (preferrable cruise speed 23 kts or more).

So the way to go is either a CVE (fashionably "drone mothership" or to equip the merchantmen with naval systems containers for a self-protecting convoy.

See
https://defense-and-freedom.blogspot.com/2018/01/modern-warships-i-introduction.html
, specifically https://defense-and-freedom.blogspot.com/2018/02/modern-warships-vii-conclusion-two-paths.html

also https://defense-and-freedom.blogspot.com/2009/05/concept-for-future-naval-battle-fleet.html
 
Big cargo ships are amazingly difficult to destroy unless
- heavyweight torpedo hit
- big naval mine hit
- big bomb with delay fuse explodes under the hull
- out of control fires onboard

I do suppose that cargo ships abort mission when they get serious hits well short of full destruction, though.

Furthermore, it should be rather easy to take out the main rudder of a cargo ship and a destruction of the bridge is super easy.
Don’t need to destroy them necessarily. Cause fire, burn the cargo, force the crew to abandon the ship.
Or as mentioned before, board, take the crew or force them into life boats and then place scuttling charges leaving all the hatches open.
 
Small vehicles cannot combine long range with high speed and high mission systems power consumption.
That's why you need big hulls. Even a 10,000 ton escort is rather small for a transoceanic convoy of container ships (preferrable cruise speed 23 kts or more).

So the way to go is either a CVE (fashionably "drone mothership" or to equip the merchantmen with naval systems containers for a self-protecting convoy.

See
https://defense-and-freedom.blogspot.com/2018/01/modern-warships-i-introduction.html
, specifically https://defense-and-freedom.blogspot.com/2018/02/modern-warships-vii-conclusion-two-paths.html

also https://defense-and-freedom.blogspot.com/2009/05/concept-for-future-naval-battle-fleet.html
Been in the military and defense space online for a very long time and never heard of that site. Is that your own personal blog?
 
Small vehicles cannot combine long range with high speed and high mission systems power consumption.
I think the current experimentation done by the USN to date shows that USVs should be able to comfortably meet the range requirements of convoy escort. These vessels also wouldn't necessarily be required to transit the whole duration with the convoy but be passed off to the next unit with gas stations positioned at strategic points along the transit routes to support.

That's why you need big hulls. Even a 10,000 ton escort is rather small for a transoceanic convoy of container ships (preferrable cruise speed 23 kts or more).
Personal opinion but transits of cargo ships above 20knts is completely unrealistic.

From this link,
On 11th August 2022, we analysed the data for over 50 cargo ships on Vessel Finder, positioned right across the world. The average speed was 14.2 knots, which is roughly 16mph or 26kph. No vessel was slower than 7.9 knots and 19.8 knots was the highest speed we recorded. That’s a range of 9.1mph/14.9kph to 22.8mph/36.7kph.

Obviously, this was just an average reading at a moment in time. Many factors can influence the speed, including weather conditions, location, traffic and type of vessel.
It is a small sample but indicative of what is far more likely to be possible.

Ah no thanks. Just a short read indicates the analysis is off...
 
Indeed, 20 kts is considered to be a small cruise for a large container ship.

BUT this doesn't make them survivable on their own.
They can be detected, identified as what they are and tracked over very long distances with a submarine sonar and an SSK would be able to block a frontage of more than 50 nmi on its own without resorting to the use of missiles, just with heavyweight torpedoes.
Only if the SSK is already in front of where the container ships are going.

If the 20kt ships are doing long zig-zags? Good luck getting in front of them. You're going to need a wolf-pack just to catch one merchie.


A SSN would likely be able to block much more in deep water without moving fast enough for making cavitation noises.
Do me a favor, see how long it takes to get ahead of a 20kt contact detected at 30nmi directly ahead of you. Assume that you can sprint at 35kts, and the contact is more-or-less paralleling your course. Your attack position needs to be at least 5nmi ahead of the target.

Side note: You need to get down to 700ft/200m or so to go that fast, so it'll take ~10min between sprints to pop back up to relocate the target.




Any unarmed and not protected container ship would also be vulnerable to boarding by auxiliary cruisers' helos, to simple bomb attacks by aircraft, to naval mines, to land-based artillery, to all kinds of missiles and to any fast-enough OPV.
Yes, that's a potential problem.

Except that a surface ship is also relatively limited in detection range versus a target. Better than a sub, since they have a helicopter and other comms. But still limited. (see my reply to JohnPaulJones1775)



Once you know where they are you don’t need to hear them constantly. Without escorts no reason not to sprint for an hour or two, slow for a listen, sprint, etc.
Oops, they just zigged away while you were going fast and you lost them.



So you think in the era of radar, aircraft, and guided munitions raiders will be less successful than they were before the invention of radar?

China’s maritime militia can be armed before they start a war with drones, loitering munitions, and HMGs or small caliber cannons, mines, missiles.

China has a massive fleet of potential raiders ready to go at any time. They may not even necessarily need to pull in to ports to be armed with some of these weapon systems.
All radar does is slightly increase your visual detection bubble, and it has a higher chance of detection when a ship is superstructure down over the horizon versus the Mk1 eyeball. (for the non-sailors, when only the masts are visible above the horizon)




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Remember, everyone, Merchant Hunting requires you to positively ID the target before you blast it.
 

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