Seems like this is the most powerful weapon of all: transport your enemy into a bulkhead, planet, etc. Transport your enemy's ship inside a planet, etc.

Is there some technical reason that it can not be used this way?

  • 24
    In Star Trek IV, they beam up four hundred tons with a Klingon transporter. ("It's not just the whales...it's the water!") Mar 21, 2012 at 21:30
  • 4
    That's still far less than a starship. Memory Alpha puts the Constitution class Enterprise at nearly a million tons.
    – cjm
    Mar 21, 2012 at 22:34
  • 9
    Trouble with Tribbles: Just before the Klingon departure, all tribbles that were on the Enterprise are somehow beamed onto the Klingon ship by Chief Engineer Scott as a retaliation for the troubles the Klingons have caused, where, in his words, "they'll be no tribble at all." en.wikipedia.org/wiki/The_Trouble_With_Tribbles Mar 22, 2012 at 15:20
  • 3
    @Kyle Eat the vector of a broadly trans-species, forehead wrinkling virus? The repercussions of that might rock the Klingon empire to its core. Oct 20, 2012 at 20:00
  • 3
    Doesn't the Vidiians infected with the phage use transporter weapons to steal organs? Mar 6, 2013 at 1:03

15 Answers 15


Your basic assumption is correct. The transporter is "potentially" one of the most dangerous technologies the Federation and its allies could ever have. You could:

  • transport Marines from one ship to another killing crew/disrupting systems (acceptable)
  • transport biogenic weapons lethal to organic lifeforms (frowned upon)
  • transport photon torpedoes or other timed ordinance to the enemy vessel (been done)
  • disrupt the warp core by transmitting matter into the containment field (possible)
  • transport the entire engineering crew, deckplates and all into space (possible)

Technical Considerations

I can think of a few others with only the tiniest bit of effort. So what stops this from happening? The primary defense against transporter technology is the shield technology used by nearly every race in the Galaxy. The few races that do not use shields have a hull that prevents locking on by using dense hulls and powerful electromagnetic energy fields within their hulls, i.e Species 8472.

The transporter requires a targeting lock, the ability to ensure transport between two locations, so the shields prevent such a lock and the ability to prevent the lock does not require the full power of the shields. As long as any power remains able to be diverted to shields, no transporter actions are possible. This is one of the most basic tactics in Alpha quadrant combat. Drop the shields, transport marines to the enemy ships. Klingons prefer this and the Dominions Jem'Hadar were also quite good at it.

A second reason is the difficulty in using the Transporter with the accuracy required for warfare. It has always been a technology that did not lend itself to crisis. It requires significant computing power, consider skill to lock and transport materials, particularly against moving targets (go New Chekov!) and considerable engine power to ensure effective transport. All of these things are less available when the ship is under fire. The transporter is also vulnerable to a host of environmental conditions, electromagnetic disturbances, ion storms, nucleonic fields, dense metals and rock and is limited by range 40,000 kilometers and relativistic effects (can't transport from/to warping vessels).

Ethical Concerns

More important to the Federation is its ethics in combat. Though I cannot think of what the equivalent of the Geneva Convention might be (Seldonis IV Convention treaty) I am certain the Federation has rules about how combat should be fought and what weapons and techniques should be used. We know that biogenic weapons were outlawed and only used by rogue agencies (The Maquis, for example, who created a biogenic weapon for use against the Cardassians).

The transporter is probably one of those tools that does not get used the way it could because many of the techniques would be considered "unsportsmanlike" since it was a common policy even among more aggressive foes to take and exchange prisoners. So, combat was usually a thing where once ships were rendered incapable of fighting, surrenders were declared, life support and medical attention was supplied and prisoners were taken. Anything other than this ends up being a war crime in the very structured society that is the Federation.

I imagine other races may not play as fair as the Federation or in periods of "no holds barred" survival against such enemies as the Borg or Species 8472, I suspect even the Federation may take a "whatever works - by any means necessary" approach, and even that may vary from Captain to Captain.

When Captain Jean Luc Picard had the chance to create a recursive algorithm against the Borg, using the drone called 3 of 5 (renamed Hugh) that could potentially destroy any collective group that came in contact with Hugh, he refused despite the wartime footing of the Federation against the Borg. He considered it improper to use a living person as a weapon of mass destruction. (TNG: Descent, part I and II)

  • 2
    In VOY, they did attempt transportation at warp at least once when Chakotay was held hostage by the Kazon. If I recall correctly: Voyager was moving at warp speed while the Kazon ship was at a stand-still. Kim called out that it was a violation of safety protocols to transport while at warp, but Torres said that she could do it. They were almost successful, but the Kazon were able to block the transport. I don't remember which exact episode this was, though.
    – user
    Mar 22, 2012 at 8:45
  • 7
    It is a common trope in Trek to use their technology for things it wasn't designed for, particularly in the case of the transporter. Transporting at warp, transporting to vehicles under warp, transporting to vehicles out of range, under warp (Star Trek 2009). In that particular case, they decided to violate ALL of the previously established rules at one time. When Spock and Nu-Scotty do the impossible they do it big. Mar 22, 2012 at 15:31
  • 8
    I think Picard balked at genocide, not at the use of a person as the vector (although recognizing the drone as a person was a necessary step to recognizing the extermination of the Borg as a questionable act).
    – Beta
    Mar 22, 2012 at 15:37
  • 2
    @ThaddeusHowze The treaty similar to the Geneva Conventions that you're thinking of is probably the Kitomer (sp?) Accord. IIRC Riker mentions in Insurrection that biogenic weapons were banned by the Kitomer Accord. Mar 22, 2012 at 18:25
  • 9
    *Transporting all your Tribbles onto the Klingon ship and leaving- priceless. Mar 5, 2013 at 20:59

It is. Voyager used the transporters once to beam a photon torpedo right on board a Borg vessel. It was ... efficient.

Borg vessel being destroyed with transporter technology

  • 4
    In another Voy episode, IIRC, the Kasons got ahold of a transporter and used it to beam a few enemies into space.
    – Kevin
    Mar 21, 2012 at 21:31
  • 1
    Transporter bombs were an optional element in the Star Fleet Battles game.
    – jfrankcarr
    Mar 21, 2012 at 23:27
  • 3
    If I remember correctly, Janeway was not happy with how that went (and never did it again on-screen).
    – Bobby
    Aug 20, 2012 at 20:27
  • 3
    @Bobby: Yes, they didn't intend for the vessel to be entirely destroyed - they just wanted to disable it. By beaming a photon torpedo inside it ... of course, I totally buy that!
    – bitmask
    Aug 20, 2012 at 20:45
  • 3
    @bitmask +1 (pity, that I can do just one) for: "It was... efficient"! :] You made my day! :]
    – trejder
    Mar 25, 2014 at 7:24

Shields block transporters.

In general, transporters could not be used while the deflector shield of a ship was active, or a deflector shield was in place over the destination.

Taken from Memory Alpha.

This limitation would make transporters ineffective against any opponent worth fighting.

Finally, what would you use transporters to do? Beam someone into space? Scatter their atoms across a continent? Tremendously effective, but also inhumane. When possible, a phaser set on stun would be considered preferable by the peace-loving crew of the Enterprise.

  • 6
    Beaming into space might be crude, but scattering their atoms/subatomic particles would be effective and about as humane as you can get.
    – Kevin
    Mar 21, 2012 at 21:33
  • 1
    As a form of execution, sure. But it would be rather out-of-character for anyone in Starfleet to vaporize someone so vulnerable they aren't even protected by deflectors. Mar 21, 2012 at 22:03
  • 1
    Aren't phaser blasts often quite painful?
    – fluffy
    Mar 22, 2012 at 4:30
  • 1
    I can't find it, but I recall a line about disruptors being a very painful way to die. This implies, to me, that phasers are not that painful. Of course, getting shot with an energy beam is probably incredibly painful under certain circumstances (like in The Devil in the Dark, when they injure the Horta with phasers) but I've always assumed the Federation would make their weapons as painless as possible. Mar 22, 2012 at 14:35
  • Or.. you know, beam them directly to the brig if you wanted to comply with starfleet protocols Feb 7, 2015 at 17:08

In the Next Generation episode "Captain's Holiday", Picard instructs the Enterprise to use "Transporter code 14" - the use of the transporter as a weapon by dematerializing an object and simply never rematerializing it.

Not only can the transporter be used as a weapon, there is an in-universe name for it.


A few people have mentioned shields as a big problem, that the enemy ship would have shields prevents it or nicely stated in Thaddeus Howze's answer:

The primary defense against transporter technology is the shield technology used by nearly every race in the Galaxy. The few races that do not use shields have a hull that prevents locking on by using dense hulls and powerful electromagnetic energy fields within their hulls, i.e Species 8472.

Another issue with this is that you would have to drop your own shields to do the transport, leaving you vulnerable to attack.


In the DS9 episode Field Of Fire, a prototype TR-116 rifle (which fires bullets) is modified with a micro-transporter to shoot through walls.

O'Brien shows how a micro-transporter could be attached to the muzzle of a TR-116 rifle to beam the bullet close to the target, where it continues its trajectory. With an exographic targeting sensor, the murderer could have scanned through bulkheads, meaning he or she could be firing from anywhere on the station, at anyone. Unfortunately, the micro-transporter does not leave enough of a transporter signature to track back.

One of the most creative uses of a transporter in Star Trek, and points out just how devastating a weapon they would be. This is one of those episodes where a weapon is introduced and never heard from again. I suppose Starfleet considers assassination and sniping "distasteful", but other races and organizations sure wouldn't.

I've come across another use. In TNG Gambit...

Captain Picard appears to have been vaporized by an energy weapon in a bar fight. In reality, the weapon triggered a transporter beam. It's a clever way to kidnap someone while everyone else thinks they're dead; no search party.


Considering we see the ST universe from the view point of the Federation (And occasionally Cardassians or some of the one-shot Voyager Races), it's all colored by the Federation's ethical standards. This isn't new BSG, the Federation wouldn't even dream of Airlocking someone the traditional way, let alone using teleporters. They have no problem kidnapping someone ship to ship (to the bridge or brig), but teleporting someone into Space, a Bulkhead, or Rockbed is particularly gruesome and cruel.

And it's not just the Federation that would have that sentiment. Klingons, the single-faceted warrior race they are, would consider it dishonorable, a cowards tactic. They will beat you to death with their bare hands, but wouldn't space you. Cardassians have some (twisted) sense of honor and adhere to their own rules, including not torturing people if a treaty prevents it (Picard refused to admit he was working under Fed orders). Spacing someone only serves sociopathic purposes, and while I doubt they wouldn't use it as a threat, actually going through with it holds no logical or useful purpose. Same with Romulans. Both are pragmatists, not sadists. At best, occasional use to break the spirits of others, or to dispose of evidence. The Borg arn't so imaginative.

Then there is the practicality. With Shielding and other disruptive technology limiting when they can use it and the Technical Effort needed to pull it off, you could just throw some incredibly powerful missiles or phaser beams at them. Why use a difficult to use nuclear-powered scalpel when a easy to use nuclear explosive works?

Finally, there is the production reasons. This is a family show.

Creatively speaking, Teleporters are a very versatile tool, let alone weapon. They could start the teleportation process and stop it mid way, allowing the person's patten to degrade and fade away. Or teleport poison/virus/carcinogenic directly into someone's stomach. Teleport their organs away. Or teleport a cloud of poison/sleep/acidic/plasma gas into a room. Long Range Lobotomies! Teleport invasive fauna (read: tribbles) or mold or wild animals or nanite infection. Teleport one person INTO another or blood right on them. Teleport an entire bee hive or spider nest into a person. Some real nightmare fuel scenarios. Think Saw in space.


There is no reason disposable transporters wouldn't orbit around a vehicle outside its shields.

Additionally, as long as the target is in range, there is no reason to worry about the spontaneous reassembly on the 'other side'.

I think these transporter weapons (or should I call them de-materializers)? would be more inline with federation ethics. Yes, shields are a problem, but once they are down, using your transporter to just translate half the enemy into subspace energy would be much cleaner than blowing them up and creating a dangerous shrapnel field that will obstruct un-shielded fledgling space-fairing civilizations.

If there is a subspace race that will get angry at us, we can just store their ship in our buffers a-la Scotty on the Dyson Sphere.

  • I realize now that things don't get de-materialized and stored in subspace. they stored in a pattern buffer in normal space. They are only transmitted across subspace to allow for near instantaneous travel across our dimension (kind of like nether travel in minecraft). Therefore, they basically just disassemble the molecules into what appears to be an energized matter stream. The pattern buffer is only important if you want to reassemble it later, but as others have mentioned, this tech would only be valuable against ships whos shields have been brought down, or compensated for (ala borg)
    – nograde
    Jan 14, 2015 at 15:58

Most of the planets where we have seen fighting in the ST universe have no shields.

As a weapon, in the case of being surrounded by say an alien enemy squad, and you wanted to make a strong impression on them, without necessarily killing them, may I suggest you simply transport them 10-20' into the air. Or a holding cell. Or if you feel a bit more draconian, try transporting body parts to places they don't belong. That'll make an impression on your enemy if it doesn't kill them.

OK. Let's forget its use as a weapon, and rather more in terms of the transporter as troop support in an extended battle. How 'bout if you were in the middle of a phaser fight and unable to find time to eat? Instant lunch in your tummy! The transporter with an appropriate scanner may also be a good way to relieve yourself. :) The comic possibilities alone are worth the writers' consideration.


A variety of reasons.

Can't penetrate force fields, starship shields... You think a planet doesn't have some sort of protection against it?

According to Wikipedia's article on Transporter (Star Trek): Capabilities and limitations.


I would say that small antimatter bombs with a moderate yield would be swell for ripping down an enemies shields. Then the enemy vessel could be rapidly bombarded with photon torpedoes phasers or more anti-matter ordinance. Ethical concerns be damned.

  • According to some canon, photon torpedoes are antimatter bombs, with a small warp engine for propulsion.
    – John O
    Dec 27, 2013 at 1:02

There are some instances of transporter weapons being used, one in an early episode of voyager where the lungs are transported out of a person, and another in TNG where (Picard or Riker) is transported out of a bar and made to look like he was completely vaporized instead. The other answers address why it's rare/uncommon for the federation or its allies to use such weapons.


in voyager the Voth city ship transported the whole ship shields and all. sure it was huge but if an old bird of prey can transport a whale then scaling up to a ship shouldn't be that hard. also remember the borg can transport without worrying about shields


Ok, everybody is saying here shields and so forth but what about cloaking device? We see all of the ships having to turn shields on before battle, implying that they can not be always on. So if you have a cloaked ship, you can beam torpedo or some sort of timed ordinance in to the ship that does not have it's shields on.

To me that is a major, major weapon. Probably most devastating one. Even if you get detected after beaming something all you need is one shot and then you can bolt out of there.

Imagine hit and run tactics against anyone this way. Imagine what 10 cloaked ships could do. Destroy ANY 10 targets and bolt.

Rinse and repeat.

  • Cloaked attacks are effective no matter which weapon you use. Also, most ships have deflector shields up by default to protect against micro meteorites and unauthorised transporter use.
    – MauganRa
    Sep 10, 2016 at 13:13

You are all forgetting the real reason.


Anything else is just excuse making. It makes no damn sense not to use a transporter as a weapon and as has been pointed out here, they are no consistent rules that would prevent such.

The writers wanted a plot device that would skip expensive model shots for landing on planets and found a cheap effect that looked really nice. It doesn't have to be scientific or logical, it's just a plot device.

  • 7
    Welcome to the site. "It's a plot hole" answers are generally frowned up on here. We all know that the reason for anything in any story is "plot". The OP asked if there was a technical (read: in-universe) reason why it is not used.
    – phantom42
    Mar 5, 2013 at 20:58

Not the answer you're looking for? Browse other questions tagged or ask your own question.