Guide to EVA and Internals

From Baystation

Space in Baystation, much like space in real life, is an airless vacuum that is cold enough to freeze most non-synthetics to death in a matter of minutes. To protect against the lack of oxygen and the lack of pressure when going outside the ship, you must wear an oxygen tank, a breathing mask, and some manner of space suit.

A Beginner's Guide To Internals

Your internals, a catch-all term for a breath mask and an oxygen tank, can be found in your backpack in your crew survival kit. These keep you breathing safely in the case of toxins in the air or a suddenly depressurized atmosphere.

Emergency instructions

Oh no! A dastardly traitor has vented the mess hall whilst you were enjoying a drink at the bar. It is time to act lest you wish to die due to a lack of oxygen.

  1. With an empty hand active, click on your backpack.
  2. You should have a crew survival kit box in there. Click on the box with the same empty hand.
  3. Now select your other hand (which should be empty) and click on the box to open it. You will find a breath mask and an oxygen tank inside.
  4. Open your clothing inventory (the button on the lower-left side of your interface). Click on the mask to pick it up, then click on your "Mask" slot to wear it.
  5. Click on the oxygen tank to hold it.
  1. On the right side of your screen is an oxygen tank icon. Below it is either "On" or "Off". If it is "Off", click on the icon to turn it "On". You will hear a sound effect alongside your internals turning on. If the tank is green, you are currently breathing from internals.
  2. Put the oxygen tank in a pocket (one of the slots to the right of your hand slots), or on your belt or back slot. This way, if you are knocked down, you will not lose the tank (and thus your air).


  • Can't find internals or lost your box? Find a blue locker with "O2" on it. These contain internals. If the area you're in isn't depressurized completely, you can yell for help.
  • Do you have your mask on? Check your clothing inventory to make sure.
  • Are you holding or wearing an oxygen tank?
  • Is the oxygen turned on? If the tank status icon on the right-hand side of the screen says "Off", it isn't. Click on it to turn it on. If this doesn't work, keep troubleshooting.
  • Is your mask on your face? If you're wearing one but it's down around your neck, you need to adjust it. Click the button showing your mask on the top of your screen to adjust it.
  • Is your oxygen tank full? Hold the tank and double-click on the tank. A pop-up window will show your tank pressure and mask pressure. Your mask pressure should be at least 18 kPa, and if the tank pressure is lower than that, the tank is empty. If it's empty, you need to find a new tank, obviously.
  • You've gotten back to atmosphere and you're still gasping for breath? There are two possibilities:
    1. Your air tank has run out, but you still have your internals on. In this case, just take off your mask or turn off your internals with the tank status button. If you hear someone else gasping and you're in atmosphere, this could be the problem (it usually happens when someone goes SSD while wearing an oxygen tank and mask). Click and drag their sprite to your sprite to open an interaction pop-up menu, where you can toggle internals or remove their mask.
    2. You have injuries that are making it hard to get enough air. Possibilities include a collapsed lung (if you were exposed to vacuum, this is the most likely), a chest injury that hurt your heart or lungs (this causes chest pain), or losing more than a fifth of your blood volume. A punctured lung is a medical emergency; chest injuries may or may not be (depending on severity), and blood loss may or may not be (depending on just how much blood you've lost). If your character knows first aid, they might be able to stabilize themselves. Otherwise, yell for Medical or get yourself there if you can still walk.

To equip any kind of internals, it is necessary to wear a breathing device on your face and to hold any kind of breathing tank. You then use the tank and can set the distribution pressure as well as read the remaining pressure and open the valve. It is not necessary to manually connect the tank to your mask; you do that by opening the valve.

Storing the tank away into any container or dropping it will sever the connection to your mask (and automatically close the valve). It is recommended to secure the breathing tank as to avoid accidental dropping and subsequent suffocating.

Putting internals on someone else

If you find yourself in a vacuum with someone who has lost consciousness, it's up to you to put their internals on for them. Always remember to put on your own internals first. If you pass out because of asphyxiation while securing your crewmember's safety, you'll both die.

To open the inventory of another character, click and drag their character sprite on your own character sprite. With the hand holding the appropriate equipment highlighted, place a breath mask on their face slot and an oxygen tank in their pockets or on their belt or back slot. Should they have the appropriate equipment, the option to "Toggle internals" will appear near the bottom of the popup menu.

If the person has been without air roughly 2 minutes after unconsciousness, they will stop breathing. Confirm the person in question is still breathing after you have set them up by looking at them; if not, CPR or oxygen-supplying medicine is required. To perform CPR, click on a person who is airless on help intent. Oxygen-supplying medications are Inaprovaline, Dexalin, and Dexalin Plus. There is an autoinjector that contains 5 units of Inaprovaline in your crew survival kit.

In case of atmospheric lockdown

If emergency shutters have locked down your area or you're otherwise unable to get somewhere with breathable air, remember the following:

  1. Remain calm. Panicking helps nobody, least of all yourself, and wastes valuable oxygen. Follow emergency procedures to stay stable and help your crewmembers.
  2. Avoid spreading the atmospheric issue. Do NOT open emergency shutters unless there is a makeshift inflatable airlock on the other side. This will spread unusable air, endanger other people, and make Engineering want to flay you alive.
  3. Inform others about your situation. Let Medical and others know where you are over communications and what your status is. Be as clear as you can. Enabling your suit sensors (which you can do by right-clicking your clothing and setting it to 'Tracking beacon') will help emergency personnel locate you.
  4. Await rescue. Be patient and allow first responders to reach you. Depending on the severity of the situation, you may not be attended to first.


EVA stands for Extra Vehicular Activity; this refers to any situation in which you are in space. Space is very dangerous if you are not prepared, and there are many ways to go about venturing into it. For the purposes of this guide, EVA will also include depressurized environments within the station.

Note: Be aware that EVA is often used to refer to EVA storage, which is where supplies for EVA can be found.

Space suits

Space suits, which come in three main varieties, are required to survive in an under-pressured or over-pressured environment.

Type Image Description
Eva softsuit.png
Softsuits are the least advanced type of space suit. However, they can be worn by all crew members, regardless of species, and are commonly available. The drawback is that they can be torn very easily. They are not intended to be used outside of emergencies.
Eva voidsuit.png
Voidsuits are the most commonly used suit. Although it is only wearable by humans by default, they can be fitted to any other species, besides Vox, using a suit cycler. These are more durable than softsuits, and often come with protection related to the job they are designed for.
Eva hardsuit.gif
Hardsuits, often known as RIG suits, are the most advanced variety of space suit. They allow heavy customization and are often specialized for the job they were designed for, but they are harder to operate and often hard to gain access to. Certain varieties are also only able to be operated by one species, usually Humans.

Mechs can also serve as EVA capable vehicles, though obviously they have a tough time navigating space. To prepare a mech for EVA, enter a mech and use the buttons on the left side of your screen to close the hatch and turn on the air supply.

Prepping a Voidsuit

Most departments have special voidsuits that only they have access to. These can generally be found in EVA storage on Deck Three. Voidsuits are stored in suit storage units, which you click on to interact with.

  1. Unlock the unit, then open it.
  2. The unit should contain a helmet, a voidsuit, a breath mask, an oxygen tank, and magboots.
  3. Take your oxygen tank and find a canister of O2.
    1. Insert the oxygen tank into the canister.
    2. Click on the canister and maximize the canister's release pressure by pressing the rightmost +.
    3. Open the valve.
    4. Wait until the "Tank Pressure" reads 1013 kPA.
    5. Close the valve.
    6. Click "Eject". Your tank is now full to the brim, giving you about 50 minutes worth of breathable air.
  4. Go back to the unit. Take the magboots, helmet, and oxygen tank and attach them to the voidsuit.
  5. Use voidsuit at leisure.


Hardsuits are considerably more robust than your average voidsuit at the cost of being more difficult to operate and occupying your backpack slot. Each head of department has a hardsuit in command EVA, and several departments get access to their own hardsuit.

Un/Equipping a Hardsuit

To activate a hardsuit, equip the hardsuit on your backpack slot and navigate to the "Hardsuit" tab. Click "Open Hardsuit Interface" and toggle the status of your hardsuit. It'll take a couple seconds to fully activate, during which you must stay still while your suit turns on – otherwise you must repeat the process again. Be sure to remove any obstructions – such as jackets, armor, hats, and gloves – before attempting to deploy your hardsuit, or it will be unable to fully deploy.

To unequip, simple select 'Toggle Hardsuit' again to deactivate the parts one by one. Only then will you be able to take the control module off your back.


Each hardsuit comes with a set of standard modules: a mining hardsuit has a drill and ore scanner, a medical hardsuit has a set of medical syringes, and so on.

The currently selected module can be activated using middle-click on the mouse. This key binding can be changed under the OOC tab using the verb "Toggle Hardsuit Activation Mode", to use alt-click or control-click instead.

Modules are controlled using the 'Hardsuit modules' tab or in the hardsuit interface. Remember that some modules use power, and that a depleted power cell will require premature maintenance (see below).

Prepping and Maintenance

To prepare your hardsuit:

  1. Apply crowbar to hardsuit module to open the access panel. Some hardsuits may require you to first swipe your ID to unlock the hardsuit.
  2. Apply wrench to hardsuit module. This will trigger a popup asking you what you want to remove; select the tank.
  3. Fill your tank at the O2 canister.
  4. Pop the tank back in your hardsuit module.
  5. Apply crowbar to hardsuit module to close the access panel, swipe your ID again to re-lock it.

Hardsuits are highly modular and customizable – other ways you can maintain and upgrade your hardsuit are as follows:

  • You can remove modules and cells from the hardsuit, following the same steps as removing tanks. Modules and cells can both be swapped out, allowing you to add more powerful cells or custom modules to your suit.
  • A hardsuit's wiring panel can be accessed by opening the access panel and then using a screwdriver to open the wiring panel. This allows you to hack the hardsuit using wirecutters or a multitool, bypassing ID restrictions or sabotaging the suit – see Guide to Hacking for more details.
  • To repair a broken hardsuit:
    • Use a welder on the hardsuit to repair punctures, or metal sheets on the hardsuit for scorch damage.
    • For electrical issues caused by EMPs, open the access panel and apply nanopaste.
    • For individual damaged modules, remove the module from the hardsuit and apply cable coil for light repairs or nanopaste for full repairs.
  • To forcibly remove a sealed suit from a person, hardsuit removal surgery is required. This requires a welding tool or a circular saw, and some sort of operating service (preferably an operating table, though roller beds, chairs, or regular tables will also work). Success chance is based on EVA skill, rather than Medicine or Anatomy.


To move in space, you have several options:

  • Move adjacent to a structure. While next to an object such as a wall or a scaffold, you can move normally. Depending on your EVA skill, there's a chance you may slip and end up floating off, so it's best to have magboots turned on to remove that chance.
  • Use a jet pack. Like hardsuits, jet packs take up your backpack slot, but allow you to freely move in space. Right-click on a jet pack to turn it on, and make sure to toggle stabilizers so you don't keep moving after you've stopped pressing a direction key.
  • Use a fire extinguisher. Toggle the safety off on the extinguisher, and discharge it facing opposite of the direction you want to go. Naturally, the jet pack is better than the fire extinguisher due to the lack of precision.
  • Throw medium-and-above-sized items. Throwing objects in the opposite direction of where you want to go will propel you. Keep in mind this is more of a survival tactic than an ideal way to move in space, as your items are limited.

Be careful not to move too far into space. You may switch Z-levels, which will make it very hard to find your way back to your ship, possibly stranding you forever.

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