Adventures in Time & Space OOC

[NontheistCleric]

Question: Which rules are we using for Space-Time Navigation? The Gamemaster's Guide says it's Ingenuity+Technology (page 104), but the Time Traveller's Companion says Ingenuity+Transport (page 65 for general time travel, 76 for TARDISes).

Mostly asking because I put points into Transport (Time Travel) to represent Pavilion's ability to operate a time-travel device, but now I'm not sure if that was the thing to do (and if I should put them into something else if that's not what they'll be representing in this game).

Also, if we are using the Time Traveller's Companion rules, can we use the TARDIS rooms detailed there? Things like the medical room and wardrobe and so on, which can give bonuses to certain rolls.