Pedrop says:
... Wow... things are starting to get complicated:) ...
Traveller is
not rules light. :)
Pedrop says:
... caretaker should not see anything suspicious in us powering up the ship ...
Agreed. He would expect it. And may see it as strange if you
don't do that soonish.
Pedrop says:
... expecting us to work on the ship for
at least few days? ...
Indeed. You can assume that whatever lie you told him covers you for at least as long as you would stay. The longer you stay the more chances there are that he will decide he needs to actually see your paperwork, or that he is lonely enough that he wants to come over and talk, or for news from the planet to get to him and change the situation, though.
Pedrop says:
... would contact caretaker first. ...
Presumably. He would then tell them "people are doing work up here" and they may spend time checking their records before telling him that you are not authorised.
But they may also decide to check it out immediately, the tense political situation might have everyone on edge --or have them ignoring this-- so you don't know for sure how they will react, it might not be by the book.
Pedrop says:
... it will took them days-long-time to get to the depot ...
Probably, though that discounts the possibility that they may have a ship or a squadron in the area, or they may be on their way here already 'for other reasons'.
Whatever you do, there will be some risk, and some unpredictability.
Pedrop says:
... intercept the signal TO the caretaker ...
It seems easier to try intercept the signal
from the ship than to try to intercept a signal to a third-party at a distance.
It would take quite an operation to disrupt military communications in the field. But you are hands-on with Betty, so you have more options here.
Pedrop says:
... or if he get it, just lie or stop him ...
If he gets a signal, and tells you about it, then you will have such options. If he just answers the signal, then you might not even know about it.
Pedrop says:
... Do any of us have some Comms or Sensors skills to do the interception ...
Abby has some Comms (possibly 2) and I plan to have her pick up some Sensors (this was just to fill in the gaps in the character sheets). So the only person who could really try such a thing is already busy. :)
Pedrop says:
... power plant that will only last to open the cargo hold for Ginger to fly in ...
Sure. You could try something like that.
Starting up the fusion power-plant without the computer is a significant risk though.
You could maybe find a way to open the cargo bay doors without power.
Pedrop says:
... use some Ginger power to get the cargo hold door open and then close? ...
A Power Engineer should be able to use Ginger's power (run an extension lead over) to get the door's motors going.
Pedrop says:
... looks that engine room have it's own air lock door ...
Correct.
Pedrop says:
... so maybe we could use Ginger's life support ... to pomp the air in this engine room ...
Possible. Though the engine room is twice the size of Bob's Gig, so it will strain his systems. Maybe a Power-Plant Engineer could help there, or at least reassure him that it will not strain them enough to be a problem.
Your presumption that Bob will be happy with this relies on your making him happy. :)
Pedrop says:
... close its airlock ...
Or attach a docking couple (you planned for this, right?) to the inside and dock Ginger to the Engine Room, that way you can have access to both the Engine Room and the Gig (with its bunks) for the duration. This would mean that Bob is not available for other duties quite as easily.
Taking the Gig inside would also reassure the caretaker that things look normal. He may assume that means you have power (as expected).
I don't know what 'Grav Plates' look like, but you may have planned ahead and brought some temporary ones that you can place in the Engine Room so Abby does not need to deal with Zero-G (and its -1) as well.
Each of these would require some sort of roll or risk, or be a thing that could go wrong. But each step you take is also a step to make your job easier.