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Provided I had superhuman strength and the ability to open a door even with one atmosphere working against me, are there any singular doors or windows on the ISS which I could open directly to vacuum?

I don't want to have to open two doors so the airlocks are out (assuming they are kept pressurized when not in use).

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Sure (although you might have to open other hatches to get to them)

The hatches in the PMAs connected to Node 2 if no visiting vehicle there, and the unused CBM hatch on Node 2.

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The unused CBM hatches in Node 3.

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The unused CBM hatch in Node 1

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Probably Russian-side stuff too.

Source: Flying around in DOUG and looking.

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  • $\begingroup$ One hopes that 'superhuman strength' would be needed to overcome not only 1 atm pressure but any number of safety interlocks! $\endgroup$ – Carl Witthoft Nov 19 at 12:40
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    $\begingroup$ Are the hatches sealed under pressure, or do they have locking mechanisms? $\endgroup$ – M. Guru Vishnu Nov 19 at 14:07
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    $\begingroup$ @Intellex actually just go here: space.stackexchange.com/questions/13799/… $\endgroup$ – Organic Marble Nov 19 at 14:10
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    $\begingroup$ To my knowledge, there are no interlocks on the CBM hatches. The air pressure alone on a hatch creates roughly 35,000 lbf keeping it closed. $\endgroup$ – Tristan Nov 19 at 16:33
  • $\begingroup$ @Tristan I agree. $\endgroup$ – Organic Marble Nov 19 at 16:39

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