I have a base in Dublin which I used to service with my Barge. I could go through the JG from NL, but that is destroyed. I could go through the JH from Leeds. in spite of the asteroids and rocks, but that is no more. The only way in is through the JH from NL. No way through.
Thrusters only get you to the usual 44 max, but have a longer thrust time so that is an improvement.
These beasts were designed to travel through the harsh environment of deep space, but can't if there are asteroid fields blocking its passage at so many jump holes.