North's been on the ship recently. He and Theta should be able to give an accurate idea of the layout, especially if there's been any changes.

He gets mouthy, just tell him I sent you. He'll probably behave. [ Maybe. ]

[ Given how paranoid Wash and Epsilon are of each other, the AI was probably regretting not having a safe source to jump to. Or at least back himself up to. This world was weird enough - and the MoI didn't appear to have computers that could be communicated with.. ]

There's nothing to restrict them from doing so here.