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Modern submarine torpedo attacks are not like in the movies

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Re: Modern submarine torpedo attacks are not like in the movies

#181

Earlier quoted context omitted.

> To put it another way, if there was a war so bad, the US reinstituted the draft, would these tools still be relevant? The drafted people would all go to factories and boatyards to build thousands of new submarines. Each submarine would likely have no people on board, and be fully remote control. The age old problem of "you can't hide while sending and receiving data, so you can't make a drone sub" has been solved b…

I have read the comms channels underwater are low to very low bit rate. If true, a remote controlled sub seems unrealistic. Also a remote control sub would be continually sending data back which surely is tantamount to continually yelling "I'm here! I'm here!", so I don't really buy the RC sub theory yet. (edit: I don't buy your suggestion that it's possible to hide that. You just need to emit too much power and you…

Point a laser straight up at your satellite.

Re: Modern submarine torpedo attacks are not like in the movies

#182
post #163

Earlier quoted context omitted.

The way I was taught this is that the strongest force and impulse (integral of a force over the time interval) is upwards after the explosion. The ship is already structurally destroyed at this point. Nothing works even if the ship does not immediately sink. When the ship falls donwards is when the keel breaks, hull breaks and water gets in. Any subsequent oscillation can cause more damage.

I know this is actually very important and interesting in the context of understanding how to build better ships/torpedoes, but I'm just imagining two seamen clinging to debris arguing on the exact mechanics by which the torpedo blew up their ship.

Clearly the solution is to have hinges in the middle of the keel.

Re: Modern submarine torpedo attacks are not like in the movies

#183

A misconception I had was that submarines fight each other under water. https://en.m.wikipedia.org/wiki/German_submarine_U-864 "It is the only documented instance in the history of naval warfare where one submarine intentionally sank another while both were submerged."

Not for nothing, but have there BEEN many submarine engagements since WWII?

Is current doctrine that, say, fast attack subs would shoot at opposing boomers from underwater? I mean, it seems likely, right?

Re: Modern submarine torpedo attacks are not like in the movies

#184
post #81

Earlier quoted context omitted.

Except we already make most of our air-based strikes from drones currently, so that can't be the reason we have SOME piloted planes.

Air to land not air to air.

We have plenty of air to air drones. They're mostly prefixed with "Standard Missile", but that's what they are.

Re: Modern submarine torpedo attacks are not like in the movies

#185

I rip on surface fleets as being floating reef fodder that would be sunk almost immediately against any modern power, either because of the sophistication of submarines, the rise of cheap drones winning the economic exchange, or death-from-above missles and ICBMs that are basically undefendable. But against subs I'm surprised there aren't plans for a drone-net that surrounds a fleet or high value ship that can detect…

Smaller drones have weaker propulsion and can't keep up with the ship its supposed to provide a detection bubble around. Being underwater and having to deal with additional drag also doesn't help. The large size of an aircraft carrier belies the fact that it is the fastest ship in the carrier group and can outrun all of its escorts. Larger ship = more space to pack powerful engines. That's also a major issue for a lo…

... torpedos can go 50 knots for 100km/over an hour, but a drone can't?

Fundamentally underwater hydrodynamics is still in its infancy. How do I know? I just have to look at a shark.

Re: Modern submarine torpedo attacks are not like in the movies

#186
post #84

Earlier quoted context omitted.

Well. The Vietnamese pilots were using Soviet tactics, mainly Ground Control vectors. Most Vietnamese pilots were rookies, but they did have some aces who would dogfight, like Colonel Toon, who was shot down by Randy Cunningham: https://en.wikipedia.org/wiki/Duke_Cunningham But largely the tactics were to surprise the Americans with first MiG-17's, then have a MiG-21 at high speed do an ambush pass from the clouds th…

The no gun thing is over hyped. The Navy never did install guns in their fighters in Vietnam, and still ended up reversing the kill ratio.

It was all about missiles. Once the missiles got fixed, the kill ratio turned around very quickly.

And yes, had nothing to do with guns. Guns are and have been obsolete on fighter aircraft for decades.

Re: Modern submarine torpedo attacks are not like in the movies

#187

A misconception I had was that submarines fight each other under water. https://en.m.wikipedia.org/wiki/German_submarine_U-864 "It is the only documented instance in the history of naval warfare where one submarine intentionally sank another while both were submerged."

Not for nothing, but have there BEEN many submarine engagements since WWII? Is current doctrine that, say, fast attack subs would shoot at opposing boomers from underwater? I mean, it seems likely, right?

Not a submariner, but I always thought that was the essence of the existence of the fast attack.

Re: Modern submarine torpedo attacks are not like in the movies

#188

Earlier quoted context omitted.

Smaller drones have weaker propulsion and can't keep up with the ship its supposed to provide a detection bubble around. Being underwater and having to deal with additional drag also doesn't help. The large size of an aircraft carrier belies the fact that it is the fastest ship in the carrier group and can outrun all of its escorts. Larger ship = more space to pack powerful engines. That's also a major issue for a lo…

There were networks of deployable remote surveillance buoys being developed by the 1990s. Source: Public research reports of military research organizations. Presumably removing the propulsion expectation simplifies the problem domain.

So they were deployed but then abandoned?

I wonder if you could have a flotilla of heli-drones that drop in sampling microphones/active sonar. Wind might be hard to deal with in storms or heck even typical conditions.

Re: Modern submarine torpedo attacks are not like in the movies

#189
post #134

Earlier quoted context omitted.

> To put it another way, if there was a war so bad, the US reinstituted the draft, would these tools still be relevant? The drafted people would all go to factories and boatyards to build thousands of new submarines. Each submarine would likely have no people on board, and be fully remote control. The age old problem of "you can't hide while sending and receiving data, so you can't make a drone sub" has been solved b…

I'm a cryptographer, so I'm inherently curious about secret communication. It just so happens that I'm also very curious about radios, satellite communications, etc. Do you have a link that provides more information on these "below-noise-floor gold codes"? I tried googling, but I haven't found much technical information that I trust is entirely truthful or relevant.

The principle is that if your ally has a receive antenna with a gain of X, and you use a modulation scheme with a coding gain of Y, and you transmit strong enough that your signal can be received by your ally with a snr margin of Z, then as long as your enemy doesn't have a receive antenna with gain > X+Y-Z, they can't detect your signal from the noise.

Since Y can be increased arbitaraly (at the cost of channel data capacity), it's always possible to transmit some information to your ally without your enemy seeing a transmission, it might just be a few bits per second, but theres a lot you can do with a few bits per second in warfare.

One needs to make sure that the above holds true for all possible frequency windows and time windows, so no carrier waves or high power sync pulses!

I believe the implementation is much harder than the theory - just one crystal oscillator or PLL anywhere in your radio hardware will leak some of that frequency into the output, and since the bandwidth of a crystal oscillator is super low (obviously an ideal oscillator has zero bandwidth), even a tiny leak is detectable by an enemy.

Re: Modern submarine torpedo attacks are not like in the movies

#190

Earlier quoted context omitted.

Long gone are the days of the British soldiers taking a knee in formations to shoot their muskets. Essentially expecting to take turns with the enemy trading shots. Never did understand that mentality at all.

It was an innovative approach in the Napoleonic era. French units would form up in columns with the idea of punching through the line with conscripts. The British would spread out and deliver a much higher volume of fire, and do so very quickly.

Where do these unhistoric French bashing memes come from? Is it taught in school in US and UK? I swear to god Anglosaxons thinks that the English won the 100-year war.

They would not form deep columns to punch through, only one nation used solid squares in that age and that was the Prussian army. The French would form battalion columns which are pairs of companys deployed individually in lines after each other. Most of the brittish vs column memes are from ambushes where naturally the ambushed part had not time to deploy to line.

http://www.napolun.com/mirror/napoleonistyka.atspace.com/inf... " The Prussians formed their battalions (4 companies each) rather in closed columns than hollow squares. Their regulations issued in 1812 (Exercir Reglement fur die Infanterie) eliminated the hollow square in favour of a dense column formed from the Angriffscolonne."

The french moved to contact in maneuver columns, Just Like Everybody Else Did As Well. The fact that you don't hear the brittish doing it is because they very seldom advanced at all in any battle. This is what we still do, we march manourver battalions in columns on roads and deploy mechanized forced out to a line once we are close to the enemy.

" - however, if the enemy kept his cool and opened fire only at close range, the officers instead of tightening the column, they deployed it into line and opened fire. As soon as the enemy began wavering under the fire they charged with bayonets. In 1805 at Austerlitz, French columns advanced with great coolness and at slow pace. The Russian infantry fired at long range but the French continued their march until they were 100 paces away from the enemy. They halted and opened fire, then "formed in several lines" and rapidly moved forward. The enemy fled. Captain Bonnet described similar infantry attack at Borodino; after few minutes the Russian skirmishers arrived in good order a little to the left "... and a dense column to our right. I deploy my battalion and, without firing, march straight at the column. It recoils. When carrying out this movement we were so exposed to grapeshot from the guns in the village that I saw my battalion falling and being breached like a crenellated wall. But still we went on.""

And by the way the nation which most frequently deployed "spread out" troops are, wait for it, the French!

"Several companies or even battalions could be employed as skirmishers (tirailleurs en grande bande). The tiralleurs en grande bande acted in large numbers, stormed or defended a position, or turned the flank of the enemy. The large skirmish formations were usually supported by columns and artillery. At Friedland General Oudinot had deployed 2 full battalions as skirmishers into the Sortlack Wood. In 1814 at La Rothiere four French battalions were formed in skirmish order by La Giberie to anticipate any attack which might develop in the rear of the wood. The French on occasion deployed even entire divisions [!] in skirmish formations. (Nafziger - "Imperial Bayonets" 1996 p 111) In 1806 at Jena, the French 16th Light Infantry advanced left in front towards the woods: its third battalion advanced en tirailleurs (in skirmish order) towards the wood, the first and second battalion, marching still in column, went past the right of the woods and deployed into line in the plain at musket range from the Prussian battery."

"The British well-drilled regulars were humiliated by American farmers, militia and Indians fighting in lose order. The american experience made a profound impact and resulted in tactical and organizational changes in the British army. But still the quality of the British skirmishers (except the 60th and 95th Regiment) was below their French counterparts. French General Foy wrote: "Several regiments of the line, such as the [British] 43rd, the 51st, the 52nd etc., are called light infantry regiments. These corps, as well as the light companies of the battalions, have nothing light about them but the name; for they are armed and with some slight change in the decorations, clothed like the rest of the infantry. It was considered that the English soldier did not possess sufficient intelligence and address to combine with the regular duty of the line the service of inspiration of the sharpshooter."

A Royal Scots officer wrote after Waterloo, that the French skirmishers were better trained, and on the whole much more effective in this type of fighting than the British skirmishers. (Barbero - "The Battle" p 255)

Moyle Sherer of the 34th Foot wrote on the British skirmishers: "Not a soul….was in the village, but a wood a few hundred yards to its left, and the ravines above it, were filled with French light infantry. I, with my company, was soon engaged in smart skirmishing among the ravines, and lost about 11 men, killed and wounded, out of thirty-eight. The English do not skirmish so well as the Germans or the French; and it is really hard work to make them preserve their proper extended order, cover themselves, and not throw away their fire; and in the performance of this duty, an officer is, I think, far more exposed that in line fighting." (Rory Muir- "Tactics and the Experience of Battle in the Age of Napoleon")"

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