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Space Suits Are SCUBA Gear
Have SCUBA gear—will travel

Sci-fi space suits inevitably have exposed tubes leading from the air tank to the helmet, like twin-hose SCUBA gear. Since space suits are fully pressurized, not just the helmet, these serve no purpose but to be yanked out either to provide a moment of tension or an easy way to end a hand-to-hand fight, depending on if the luckless wearer is a hero or a villain. Even if reconnected, this may lead to an oxygen crisis.

Real space suits have no such dangerously exposed air hoses. Real SCUBA gear has a backup regulator should the first one go bad and the hoses are low pressure. Either sci-fi writers are making commentary on a dystopian future with no safety oversight, they've only ever looked at SCUBA gear (before the 60s that would be everyone) and at other fictional spacesuits that exhibit this trope, or they just need a cheap excuse to add tension.

Examples:

Live-Action TV
  • In the Star Trek: Enterprise episode "Damage," a cracked-out T'Pol, jonesing for some literal rock, falls into a depressurized cargo bay, leading to her air hose coming undone and a frantic struggle to put it back.

Film
  • In 2001: A Space Odyssey, the space suits had an attached air line. When HAL's pod attacks Frank Poole it rips out his air line, causing him to die of vacuum exposure/lack of air. Watch it here, as Frank frantically tries to re-attach the line.
  • Inverted in The Abyss, where Bud's deep diving suit looks a lot like an armored spacesuit.
  • In The Empire Strikes Back, an infestation of mynocks required the crew of the Millennium Falcon to venture outside in whatever paltry atmosphere can be found on a large asteroid. They wear face-mounted masks with tubes leading back to oxygen tanks.
  • Used in Armageddon so that Bruce Willis can subvert his future son-in-law's Heroic Sacrifice by yanking his air line and taking his place.
  • Happens in cheapy productions like Missile to the Moon where they just used air force jumpsuits, helmets and oxygen cylinders.
  • Star Trek
    • Averted in Star Trek: The Motion Picture. Both Spock's and Kirk's space suit air systems were contained within a backpack type suit which fed directly to the helmet.
    • Likewise averted with Chekov's and Capt. Terrell's suits in Wrath of Khan.

Literature

Toys

Video Games
  • In the old Lucasfilm adventure game Zak McKracken and the Alien Mindbenders the lead character builds a spacesuit out of SCUBA gear (the helmet is a fish bowl sealed with tape). Obviously, not the most serious of games.
  • In the video game adaptation of Rogue Trooper, some of Rogue's melee animations involve ripping these tubes out of Nort environment suits, exposing them to the toxic air of Nu Earth.

Western Animation
  • Futurama has the classic air tank and hose.
  • Jackie Chan Adventures does this in the battle with Tso Lan, the Moon Demon. The good guys have the ingredients for the spell to banish the demon again, except one of them is inside Jackie's suit. Tso Lan gloats that Jackie can't remove his helmet without killing himself, to which Jackie replies "Let me air this out" and briefly unhooks his own air hose.

Real Life
  • NASA's Neutral Buoyancy Laboratory (NBL) at Johnson Space Center. Because space suits are conveniently airtight and pressurized, they actually do work underwater just as they do in space, and because of that, NASA actually trains astronauts by using a 40' deep pool within which the suits will feel weightless and movement will be similar to that in space (albiet with much much more drag).
  • The Analog Surface Suit (ASS?) used at the Mars Desert Research Station in Utah.

Space StationSpeculative Fiction TropesSpace Trucker
Space StationTropes in SpaceSpace Western

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