Reality check; Battleships can't move around in the edge worlds without entering asteroid fields. It's a fact of life. Under the premise that Battleships souldn't enter asteroid fields, that means a Gamma-based battleship has about a quarter of a system to move around in, and can't leave the system.
Whilst I believe in the radiation principle (further from source (eg. Gamma) weaker the effect (smaller the ships) ) the assertion that in cases such as the Corsairs, Outcasts and Zoners, Battleships shouldn't enter asteroid fields is ridiculous.
Hell, the Blood Dragon Battleship is practically (if I'm not mistaken) only available within an asteroid field. (Kyoto, Dragon city, is in a system-wide field. The Dragon guard system attaches only to this system). You're therefore suggesting that Blood Dragon Battleships shouldn't be allowed to leave the NovaPG guard system.
As I Corsair, I would not deploy either of our Battleships into Omega-41, beyond Omicron Theta (or Alpha on rare occasion). I would not deploy them beyond Omicron Delta. However, the suggestion that Battleships shouldn't enter fields limits a Corsair battleship's movement to Gamma only.
Come to think of it, they're available only at Tripoli shipyard, inside an asteroid field!. So...you're saying that Corsair Battleships shouldn't be able to undock.