In article 678dd8ad-17c8-454a-981f-
, says...

On Dec 9, 11:54*pm, "Jorge R. Frank" wrote:

And that will be the Crew Dragon (which docks) and not the current Cargo
Dragon (which is berthed).

Cargo Dragon is unsuitable for crew emergency return because the active
side of the berthing mechanism is on the station side, and because it
requires a human operating the SSRMS to unberth and release it.- Hide quoted text -

- Show quoted text -

i wonder if that release could be ground controlled in a emergency?

You can't assume that it can be reliably controlled in an emergency.
The emergency could involve power, communications, or computers on ISS,
any of which could disable the ability to control the CBM from the
ground.

i am not saying this would be optimum, but just a last ditch fallback
in the case soyuz isnt available.

The whole point of the emergency return vehicle is to get the heck off a
damaged/disabled ISS and back to earth in a timely manner. If it's
stuck at ISS due to the inability for the ground to command the CBM,
it's not much of a return vehicle, is it?

Jeff
--
" Ares 1 is a prime example of the fact that NASA just can't get it
up anymore... and when they can, it doesn't stay up long. "
- tinker