Maezer |
Pathfinder Adventure Path, Lost Omens, Rulebook Subscriber
Its defined in the same paragraph. 'Cruising Flight' renders you 'off-target' and 'flat footed'. Those conditions are describe on page 276.
In essence you take a -2 to AC, -2 to attacks, and can't make reactions while in cruise flight mode. I don't see any reason why your speed would change, so it would remain 30' per move action.