Gravity Slingshot for rapid astronaut movement?

I want to nestle my CNC/Bridge deep within the bowels of my ship where among other things I will have my ship core. However I also want to be able to quickly enter my ship's core from outside the ship and exit my ship from the core. Manually walking/floating that distance every time will rapidly become such a tedious routine that I am sure I will regret not having an easy to access bridge, even though that also means easy to destroy.

What I am wondering is if it would not be possible to...

Gravity Slingshot for rapid astronaut movement?