Comment by oilman

In 99.99% of real-world scenarios, the rig would have other options to bootstrap a black start—like fully charged air tanks, backup power from a support vessel, or even emergency battery systems. The hand-cranked air compressor is really a last resort tool. We test it during commissioning to prove it could work, but in most cases, it’s never used again in the rig’s working life. It’s there for the rarest situations—like if a rig was abandoned during a hurricane, drifted off station, and someone somehow ended up back onboard without normal support. It’s a true "everything else failed" kind of backup.