Talk:Naval mine

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Double paravane sweep?[edit]

I have never heard of this being used. It seems like it would make the risk far worse for the sweeper with no gain, compared to simply having a single paravane and twice the cabel length to cover the same area. When sweeping you either start on "safe" water and work your way into the minefield without ever exposing the sweeper, or if in a real hurry to clear a path, you sweep a single line through the minefield and then you keep the sweeper in water you know are clear while enlarging it. A double paravane sweep is a lot of extra work and no gain in both cases. It would also make it harder to cut the sweeper free, as the crew would have to remove several extra wires to clear the sweeper in the case of an attack.


It was used. I haven't done enough reading to know the tech reasons why; AFAIK, it was to minimize the pressure wave on "clamshell" mine exploders. Trekphiler 10:10, 30 December 2005 (UTC)

The double sweep was used as a "check sweep". The minefield was swept in the normal way with the sweep wire deployed on just one side, then to prove that the area was clear, the area was covered again a sweep on each side (thereby covering twice the area in the time available). This is standard WW2 minesweeping procedure. No citation for this information - I've been learning all about WW2 in the Adriatic whilst taking my father-in-law to hospital appointments (he was a Royal Navy diver on a depot ship for a minesweeping flotilla).ThoughtIdRetired (talk) 11:49, 26 January 2014 (UTC)

The mining threat[edit]

The first actions of the naval campaign started the day that war was declared. Royal Navy vessels dredged up and cut German transatlantic communication cables, forcing the Germans to communicate to their interests in the Americas by less secure means for the rest of the war.

The U-boat fleet, which was to dominate so much of the battle of the Atlantic, was very small at the beginning of the war and much of the early action by German forces involved mining convoy routes and ports around Britain. Initially, contact mines were employed, which meant that a ship had to physically strike one of the mines in order to detonate it. Contact mines are usually suspended on the end of a cable just below the surface of the water and laid by ship or submarine. By the beginning of World War II most nations had also developed mines that could be dropped from aircraft, making it practicable to lay them in enemy harbours (although they simply floated on the surface). The use of dredging and nets was effective against this type of mine, but nonetheless was time-consuming, and involved the closing of harbors while it was completed.

"although they simply floated on the surface)" Not necessarily. Trekphiler 10:33, 30 December 2005 (UTC)

Into this arena came a new mine threat. Most contact mines leave holes in ship's hulls, but some ships surviving mine blasts were limping back to port with buckled plates, popped rivets, and broken backs. This appeared to be due to a new type of mine that was detonating at a distance from the ships, and doing the damage with the shockwave of the explosion.

These mines were devastating; often ships that had successfully run the gauntlet of the Atlantic crossing were destroyed entering freshly mineswept harbors on Britain's coast. More shipping was now being lost than could be replaced, and Churchill ordered that the recovery, intact, of one of these new mines was to be given highest priority.

Then the British experienced a stroke of luck in November 1939. A German mine was dropped from an aircraft laying mines onto mud flats in the Thames estuary, well above the waterline. As if this was not sufficiently good fortune, the land happened to belong to the army, and a base, including men and workshops were close at hand.

Experts were quickly dispatched from London to investigate the mine. They had some idea by this time that the mines used magnetic sensors, so they had everyone remove all metal, including their buttons, and made new tools out of non-magnetic brass. They then safed the mine and rushed it to labs at Portsmouth, where scientists discovered a new type of arming mechanism inside.

The arming mechanism had a sensitivity level that could be set, and the units on the scale were milligauss. Gauss is a measurement for the strength of a magnetic field, and so they knew why it went off before coming into contact with the ship. Using the detector from the mine, they were able to study the effect of a ship passing over it. A ship, or any large ferrous object passing through the earth's magnetic field will concentrate the field at that point. The detector from the mine measured this effect, and was designed to go off at the mid-point of the ship passing overhead.

From this crucial data, methods were developed to clear the mines. Early methods included the use of large electromagnets dragged behind ships, or on the undersides of low-flying aircraft (a number of older bombers like the Vickers Wellington were used for this purpose). However both of these methods had the disadvantage of "sweeping" only a small strip at a time. A better solution was found in the form of electrical cables dragged behind ships, passing a large current through the seawater. This induced a huge magnetic field and swept the entire area between the two ships. The older methods continued to be used in smaller areas; the Suez Canal continued to be swept by aircraft, for instance.

While these methods were useful for clearing mines from local ports, they were of little or no use for enemy controlled areas. These were typically visited by warships only, and the majority of the fleet then underwent a massive de-gaussing process, where their magnetic fields were reduced to such a degree that it was no longer "noticed" by the mines. This started in late 1939, and by 1940 British warships were largely immune for the few months at a time until they once again built up a field. Many of the boats that sailed to Dunkirk were de-gaussed in a marathon four-day effort by hard-pressed de-gaussing stations.

The Germans had also developed a pressure-activated mine and planned to deploy it as well, but they saved it for later use when it became clear the British had beaten the magnetic system. They were then sown across likely invasion areas off the coast of France. This system had the disadvantage of requiring a periodic resetting of the trigger mechanism, so they were attached to chains and cables so they could be pulled to the surface and reset. Unlike the contact mine, however, in this case the mine lay on the ocean floor, and the cable ran to a float on the surface.

In 1944 General Erwin Rommel timed the resetting so that the mines would be at their best effectiveness during late April and into May - the best time for an allied invasion of France during the early summer. In June they were getting past the point of effectiveness and he ordered them pulled in for maintenance. The allies launched D-Day on June 6th, and the mines could not be replaced until it was too late.

The "clamshell" mines were considered usweepable, & the Germans were afraid to lay them for fear the Brits would counter with their own, which the Germans couldn't sweep (N knowing the Brits couldn't sweep them, either). They'd have been exceedingly useful had they been laid when built, instead of going into storage just days before Neptune went ashore... Trekphiler 10:33, 30 December 2005 (UTC)


This article has more details about minesweepers and minehunters than the actual articles about minesweepers and minehunters. Maybe we should move the information, and have the countermeasures section be shortened. - LtNOWIS 18:29, 31 Oct 2004 (UTC)

Mine models[edit]

This page contains information on a variety of different mines. Perhaps this information should be broken out into individual pages for each significant mine model? Further; a top page listing the various models, including foreign models. I suggest this because the M-08 mine appears in a few pages regarding Operation Praying Mantis and the ships involved, and it seems appropriate to make such a page (I'm about to do this). Mine warfare is an often overlooked aspect of naval warfare, yet it is responsible for casualties to more USN ships than any other weapon type since World War II. It seems appropriate that more effort should be devoted to this area of naval weapons, and thus more breakout of the information into appropriate subpages. --Durin 22:14, 8 Apr 2005 (UTC)

US Navy ships hit[edit]

Since World War II, mines have damaged or sunk 14 U.S. Navy ships, while air and missile attacks have damaged only four.

I moved this line just now from the intro paragraph down to the "Mines and the USA" section, where it's more appropriate. Still, the line begs for more data. How many of the 14 incidents were accidents? How many were actually targeted at US Navy ships? Without that piece of data, the line is bereft of meaning. Tempshill 18:12, 23 September 2005 (UTC)

None of the Mine Incidents are ACCIDENTS !!

Ok - 10 during the Korean War List_of_US_Navy_ships_sunk_or_damaged_in_action_during_the_Korean_conflict, 4 minesweepers & one tug sunk- 5 damaged destroyers. Add USS Princeton (CG-59), USS Tripoli (LPH-10) - in 1990 Gulf War, Samuel B Roberts in 1988. Still have to find the last 2. Air and missile attacks have damaged only four.- USS Stark FFG-31 in 1987. USS Liberty (AGTR-5) (in 1967) What about USS Missouri (BB-63) Accidentally hit by a few Phalynx Rounds in Desert Storm? Wfoj3 (talk) 21:08, 8 February 2015 (UTC)


The article said this:

"=== Distance mines ===
Influence mines do not need physical contact with the ship to detonate. The earliest ones were moored mines used in the American Civil war and detonated electrically by observers on the shore. These were seen as superior to contact mines because they only deprived the waterway to the enemy. Distance mines use several kinds of instruments to detect if an enemy is nearby, most frequently a combination of acoustic, magnetic and pressure sensors. More exotic solutions also exist, such as optical shadows or electro potential sensors. These are modern mines and frequently cost many times more than contact mines. Still, they are very cheap compared to other anti-ship weapons and can be deployed in large numbers.
"====Remotely controlled mines ====
"Frequently used in combination with coastal artillery and hydrophones the remote controlled mines can be in place even in peacetime, which is a huge advantage when it comes to blocking important shipping routes to defend harbours. The mines are usually modified distance mines and can be turned into "normal" mines with a switch (which prevents the enemy from simply capturing the controlling station and deactivating the mines), detonated by hand or be allowed to detonate on their own.
"These mines usually weighed 200 kg, including 80 kg of explosives (TNT or hexatonal).
"====Floating distance mines ====
"The floating distance mine is the backbone of any mine system today. They are deployed everywhere the water is too deep for bottom distance mines. Usually equipped with magnetic or acoustic sensors, a floating distance mine is effective against most kinds of ships. A floating distance mine usually has a lifetime of more than 10 years, some of them almost unlimited. The floating mines are limited by the fact that they have to float, so they cannot carry unlimited amount of explosives. More than 150 kg is simply a waste of money, as the mine gets too large to handle and the extra explosives do not add much to the mine's effectiveness.
"These mines usually weighed 200 kg, including 80 kg of explosives (hexatonal)
"====Bottom distance mines ====
"Bottom distance mines are used when the water is no more than 60 meters deep or when mining for submarines down to around 200 meters. They are much harder to detect and clear, and they can carry a much larger payload than a floating mine. Bottom mines also use pressure sensitive instruments, which are less sensitive to sweeping than any other type.
"These mines usually weighed 150-1500kg, including 125-1400kg of explosives (hexatonal)

This is a false grouping of command detonated & influence mines. I'm rewriting.

It also says this:

"===Active mine===
"An active mine is a mine that moves on its own when it is deployed. Usually submarines deploy active mines and they have the form of a torpedo. That way the mine can be deployed deep inside an enemy harbour."

This is the same as the CAPTOR system described as a separate type above in the article. I'm rewriting that, too. Trekphiler 09:57, 30 December 2005 (UTC)


It may've been called a mine for security, or perhaps conceal that it was a torpedo from the Bureau of Ordnance, which controlled torpedo production & would have taken the project over... (So perhaps for security there, too...). Trekphiler 10:03, 30 December 2005 (UTC)


I deleted this:

"(which is the area where the enlisted traditionally sleep and explains why enlisted are far more likely to die in a mine detonation than officers.)"

It isn't always true enlisted sleep forward; enlisted tend to outnumber officers, which would also account for it; & merchant ships, the most common vic of mines, tend not to have enlisted...

I deleted this, too:

"but also a deeply flawed operation."

It may well have been; keep your opinions to yourself. Trekphiler 10:12, 30 December 2005 (UTC)


There's a strong bias toward U.S. weapons, here. No mention of the pioneering work by Frank E. Smith (later Sir Frank), RN, inventing the magnetic mine in 1917, nor the German WW2 "clamshell" acoustic-magnetic (combined-trigger) mine (considered unsweepable at the time), nor (tho U.S.) the "destructor" improvised mines used in 'nam. And the description of mine warfare could use help; something should be said to submarine minelaying against Japan, the WW1 "mine barrage" across the North Sea, & the "destructor" campaign in 'nam. This is a bit bigger than I want to take on, but if somebody else does, I'll throw in my two or three cents' worth to try & keep it clear & honest. Trekphiler 10:27, 30 December 2005 (UTC)

Mine warfare[edit]

There's also something that should be said about Nimitz. He didn't use offensive mining against Japanese bases; instead, he placed subs on close blockade duty, taking them off the firing line against merchant shipping... Trekphiler 10:36, 30 December 2005 (UTC)

Since most of these harbours would have been out of range of aircraft how would he have deployed mines there without risking ships? Also subs can easily change location to follow the enemy, mines, once laid cannot. 12:58, 28 February 2007 (UTC)
Although ships may choose many routes between one port and another, all must ultimately converge at the port itself. Aside from the desirability of stationing submarines near areas with the highest density of ship traffic (for scouting and reporting to other units as well as independent attacks), several other factors may have influenced Nimitz's decisions: (1) the desirability of leaving some areas mine-free for potential later use by allied forces. (2) the difficulty of effectively mining areas with wide variation in water depth. (3) the difficulty of effectively mining ports with a large number of useful approaches in comparison to the ease of maintaining a single swept channel.Thewellman (talk) 18:41, 13 February 2011 (UTC)
♠There appears to have been a doctrinal issue at play, also: the "close blockade". There's also, it seems, two mistakes, raised by Blair: Nimitz seemed not to appreciate enemy battleships & carriers, the targets he hoped his subs would intercept, are fast & heavily escorted, so very difficult targets, & operated out of heavily defended harbors, & so a serious threat to subs stooging around. Mining freed subs from the threat of ASW while as effectively blocking access out of the port.
♠The sweeping & open channel issues are trivial IMO. To begin with, IJN minesweeping was laughably bad, so for them to even clear a channel was hard; for Nimitz's boats to keep it mined, quite easy, actually. Also, to sweep a known minefield at need is even easier than sweeping a potential enemy field, & USN certainly could sweep the best IJN could lay, when it became necessary.
♠The best places for subs wasn't off the harbors of Truk, or Rabaul, or Palau, where they frequently were, it was in the high-traffic channels: Yellow Sea & Luzon/Formosa Strait, & off the Bungo & Kii Suido. Unfortunately, thanks to King's decision to base subs in Australia, the best area, the Luzon/Formosa Strait, was off-limits for risk of fratricide...& Nimitz refused to countenance offensive minelaying. TREKphiler any time you're ready, Uhura 19:39, 13 February 2011 (UTC) (How I missed the initial comment here for so long, I can't explain. :( :( :( )
The issue of swept and open channels may have been, as you suggest, a minor factor; but Nimitz's subs would have had to re-enter our own minefields (laid under difficult navigation conditions) to re-sow an area they assumed to have been cleared on the basis of information derived from difficult observations. I have the greatest admiration for the bravery of submarine crews; but, with numerous subs mysteriously failing to return from patrols, those aren't the sort of missions that build morale.Thewellman (talk) 00:12, 14 February 2011 (UTC)
♠You may be overstating the "minefield" size or hazard, actually. The mines laid would be designed to stink surface combatants, not submarines. Penetrating minefields of this kind has been possible without "mysterious sinkings" since WW1, even in heavily mined areas. (Read the account of M. E. Naismith's petration of the Sea of Marmara in E-11 someday!) It's hard on the nerves, but not so much on morale... It's unpopular duty (not knowing if your mines actually accomplish anything, feeling like it's dangerous {it's actually not}), but it's more productive than using torpedoes & less dangerous (no sub was lost on minelaying, while over 40 were lost to IJN ASW). Also, I'd expect HYPO to be watching the minesweepers, so "refreshment" only becomes necessary when the MS are sent, & report success (reading those signals would be a hi priority, but unlikely; IJN MS was so bad...) Nor should "friendly" mines be any threat: they, too, are intended to attack surface combatants, not prevent penetration by hostile subs.
♠I'll acknowledge the hazard of Japanese mines may be greater than I think, but Layton had really good captured Notices to Mariners (chart locations of minefiels, which had to be good enough for merchants to sail thru) to warn English's (or Lockwood's) boats with, & I'll wager both would trade this hazard for more boats in Empire Waters. Layton's intel wasn't perfect (at least one boat for sure was lost to a fresh minefield around Okinawa in '44 IIRC), but in these circumstances, as noted, much more attention would be paid to IJN sweeping &/or countermining. IMO, loss of even 2-3 boats to mining would be worth the historical diversions & losses that it would avoid; IMO, it would reduce overall losses & ultimately shorten the war. TREKphiler any time you're ready, Uhura 10:54, 14 February 2011 (UTC)

Underwater Explosion Effects[edit]

Hello all. I would like to ask a more precise definition about underwater explosion effects. In this article I found a very interesting explanation about contact underwater explosion. The author Nathan Okun explains how a contact explosion can be really devastating for the ship hull. In this Wikipedia's article I read otherwise that contact mine "just" creates a hole in the ship. Moreover Nathan Okun doesn't mention the resonating effect of a distant explosion neither he describes it as the most shattering effect for the ship structure. Sorry my english and Thank You Luca —The preceding unsigned comment was added by AgenteOrange (talkcontribs) 08:39, 18 March 2007 (UTC).

I reverted alleged "old fact tag" vandalism by User:Binksternet and added the reference to an Australian publication. This should be the starting point for describing contact and nearby explosion effects (also see R.H.Cole, 1948). (talk) 15:39, 16 March 2009 (UTC)
If you're talking about this edit of mine I would not characterize it as vandalism, I'd call it article maintenance. Fact tags indicate areas needing reference, and if reference doesn't show up in a reasonable amount of time, the unsupported statements must go. As a 'vandal', I contributed the entire Aerial mining in WWII section to this article, an addition of about 1900 words. Thanks for bringing in the long-needed reference about underwater effects! Binksternet (talk) 16:23, 16 March 2009 (UTC)
Sorry for the irate name-calling, was a bit miffed to see whole sections disappearing. Thanks for the cleanup.

Swisdak, M. M., 1978, "Explosion effects and properties: PART II - Explosion effect in water," NSWC/WOL/TR 76-116, Naval Surface Weapons Center, Dahlgren, VA, (February 1978).

There was also this one lying somewhere at the ORNL site:

Calculating the Effect of Surface or Underwater Explosions on Submerged Equipment and Structures. C. David Sulfredge, Robert H. Morris, and Robert L. Sanders. Oak Ridge National Laboratory, 2005 (?) (talk) 15:25, 17 March 2009 (UTC)

I added here, rather than add new section on the talk page. Comments against the Bubble Jet Section . I thought how a modern mine works- as the bubble comes into contact with the ship's keel the support of the water is removed, and without the support in the middle the ship's own weight snaps the keel (extreme Hogging and sagging). -- Also unsure my reliability now, I thought as this bubble rises, the pressure wave/signature of the ships hull will for some distance attract this bubble in the water toward the ship's keel. Breaking small ships ? Mid size ships too- Destroyers easily. For what I write the same ideas are used with a modern torpedo, it explodes below /near the keel- not contact than the bubble does the damage to the ship- go to YouTube and any torpedo testing- the ship is usually split in two. Could a single torpedo split a modern super-tanker or aircraft carrier- I don't know. Wfoj2 (talk) 00:16, 27 April 2012 (UTC)


IMHO the 'Daisy-chained mine' concept explained amongst the 'Unusual mines' is mentioned before: in the third paragraph of 'Floating contact mines' in the section 'Types'.


The article seems to have the following sentence repeated several times "These mines usually weigh 200 kg (440 lb), including 80 kg (175 lb) of explosives (hexatonal)". Perhaps this could be put in a single place, and with a reference? Pol098 (talk) 20:27, 8 July 2008 (UTC)

Water Mine[edit]

water mine redirects here, but what else can you call a horizontal well? In spain, "water mines" are common, a type of horizontal well which goes into a hillside, tilted up slightly so no pumping is required. I have always heard them called water mines, but that may be a spanglishism from the term "mina de agua". Anyone know? Brinerustle (talk) 01:06, 21 August 2009 (UTC)

If you want to make an article out of Water mine, on the subject of fresh water drilling and supply, go ahead and take that exact redirect away for your purposes. Please include a hatnote mentioning Naval mine. Binksternet (talk) 08:24, 21 August 2009 (UTC)

Countermeasures - Passive? Hull Design/Material[edit]

What about aluminium hulls? Certainly less detectable by magnetic triggered mines. This is not my area of expertise so someone out there may have to investigate this (and above) for inclusion. -- (talk) 06:45, 29 November 2009 (UTC)
Wood was routinely used in WW2, since largely replced by Fiberglas. TREKphiler any time you're ready, Uhura 19:15, 20 March 2011 (UTC)

"Inductors", "Electromagnets" or just "coils" ?[edit]

In the Naval_mine#Passive_countermeasures section, last paragraph, it states

"Some ships are built with magnetic inductors, large coils placed along the ship to counter the ship's magnetic field."

This may not be exactly correct. Any coil of wire is an inductor. Any coil with current through it will produce a magnetic field. Add a ferrous core and it becomes an electro-magnet. Adding inductor while true, is also irrelevant in this case. Magnetic?, not until a current is run through it. Seems a case of 'puffery', using big words to make it sound more "technical". It does not improve or make it easier to understand.
Without further research for sources to clarify (there are none in this section) it may be safer to simply say "coils". ie.

  • "Some ships are built with large coils placed along the ship to counter the ship's magnetic field."

Which is exactly true and accurate. If the coils are actually electro-magnets, then this sentence is accurate:

  • "Some ships are built with large electro-magnets placed along the ship to counter the ship's magnetic field."

Any experts out there who can comment on this issue? -- (talk) 08:18, 29 November 2009 (UTC)

At least some US Warships have onboard degaussers, we never were sure how much good they would do, modern mines are multi-sensored and can be hell to sweep let alone fool with a reduce magnetic signature.Tirronan (talk) 18:17, 20 March 2011 (UTC)

If you write it cite it[edit]

Having just spent the better part of two days adding citations and removing [citation needed] tags, please don't add uncited content to the page. It is not common knowledge or common sense, most things military are not well understood by the public and everything on Wikipedia requires citation.

While I consider drive by taggers to be another form of trolling, in the end they are right, if you can't prove it by citation it should not be here.Tirronan (talk) 19:59, 20 March 2011 (UTC)

Is "Submarine Mine" A Better Title?[edit]

I just arrived here today in the course of cross-checking for an article I am doing on submarine mines in U.S. harbor defense. I tacked a bit onto the section here on 19th C. mine development (refs to be added soon), and might want to add a bit more. But the U.S. coast defense mines I am familiar with are certainly not "Navy mines" (they were planted and operated by the U.S. Army, later the Coast Artillery Corps, and had no connection to the Navy at all).

Is "Submarine Mine" a better title for this overall article? Pgrig (talk) 16:18, 2 December 2011 (UTC)

I think not. More people simply call the device a "mine" and rely on context to relay the fact that an underwater or water surface mine is what is being discussed. When another word is used to give more context, the combination naval+mine is more common than submarine+mine. Binksternet (talk) 17:04, 2 December 2011 (UTC)
Thanks for the comment. My concern is that if we're trying to build a knowledge base on mines, it's best to use the most general terms possible (that do not clash with the known facts on an issue). It bothers me, for instance, to have submarine mines placed by the Army or the Air Force (or even the Coast Guard) referred to as "Navy mines." I'd be curious to see what others think and/or what folks in other countries might consider appropriate. Pgrig (talk) 19:25, 2 December 2011 (UTC)
"referred to as 'Navy mines'" Except they're not being called "Navy mines". "Naval" ="sea", as opposed to "land". TREKphiler any time you're ready, Uhura 01:00, 3 December 2011 (UTC)

Bouquet mine[edit]

A paragraph needs to be added for the bouquet mine in the unusual mine section. (talk) 02:38, 12 August 2012 (UTC)

Unusual Mines[edit]

The deletion on: '20:56, 16 February 2010'; for the unusual mine section should be undone. There are certainly reliable citations and examples for the: Anti sweep mine, Rocket mine, Bouquet mine, Ascending mine. (talk) 02:52, 12 August 2012 (UTC)

First successful use[edit]

I m a bit confused. When was the first successful use? Was it in 1855 or 1862? — Preceding unsigned comment added by (talk) 13:11, 28 February 2013 (UTC)

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Mine breaking?[edit]

I don't know where this term comes from, but I cannot find any provenance for it. The only mention in half-a-dozen pages of a google search is this one, a 2014 book that seems to have been translated into a couple of different languages before it got to English, and may well have been culled from WP articles in the first place. So I've changed it. Mine running doesn't have any provenance either, but at least it makes sense (as in “running downwind”, or “running the gauntlet”); if anyone knows the correct term for this method of dealing with mines, perhaps they could bring it to the discussion. Xyl 54 (talk) 23:10, 14 April 2015 (UTC)


The usage and primary topic of Mine is under discussion, see talk:Mine (disambiguation) -- (talk) 03:49, 30 March 2016 (UTC)

Contemporary use[edit]

Are any bodies of water in the world currently mined? -- Beland (talk) 00:52, 26 August 2016 (UTC)