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Around 4.0G on the ride up in a space shuttle experienced with feet above your head.It is... but they don't get anywhere near that in a human launch. Significant for the time they feel it, but not a ton. And the biggest issue for most mechanical objects is the vibration by far... but as mentioned, the watch won't really experience that.
For the Apollo missions, max G was on reentry and topped out for each mission like this. G is significantly less of a problem for a human while experiencing it reclined - that sort of G is called Gz. Even if an astronaut was to momentarily experience G-Loc, they'll snap out of it when G loads subside.
My Breitling gets occasional exposure to 10G + for short times and the watches take it in their stride.
Flight | Maximum G at Reentry |
. | |
Apollo 7 | 3.33 |
Apollo 8 | 6.84 |
Apollo 9 | 3.35 |
Apollo 10 | 6.78 |
Apollo 11 | 6.56 |
Apollo 12 | 6.57 |
Apollo 13 | 5.56 |
Apollo 14 | 6.76 |
Apollo 15 | 6.23 |
Apollo 16 | 7.19 |
Apollo 17 | 6.49 |
This graph is a Saturn 5 rocket launch