Actually, the Navigator can only potentially get three best quality items by default, A Hellpistol, A metal staff (which isn't really that big of a deal), and Best quality Xeno Mesh Armor, which doesn't cover the head and has a lower armor value. I'm not counting things gained by the background information, though, as anyone from any class can get those.
Actually, let me see what you can gain with your background information right quick...
Edit:
Noble Born; Plus five fellowship, minus five willpower, High, Low Gothic, and Literacy by default as untrained basic skills. +10 bonus to interacting with authority figures or in formal settings. +1 to groups starting profit factor. Gain Peer (Nobility) Talent, and can have another Peer talent from any of the following:(Academics, Adeptus Mechanicus, Administratum, Astropaths, Ecclesiarchy, Government, Mercantile, Military, or Underworld.) Every Noble family has sworn enemies. The GM is up to decide this. Double your Toughness bonus, and add 1d5 to determine your starting number of wounds.
Roll 1d10. 1-3, 2 fate points, 4-9, 3 fate points 10, 4 fate points.
Savant: Gain your choice of Logic as a trained skill, or Peer (Academic), also gain your choice of +3 Intelligence, or +3 Fellowship, but take -3 toughness
Renegade: As a renegade, you can choose from the following three archtypes
Recidivist; Gain Enemy (Adeptus Arbites) and Resistance (interrogation), and Concealment as a trained basic skill.
Freethinker; +3 intelligence or +3 perception, -3 willpower, gain Enemy (Ecclesiarchy)
Dark Visionary; Your choice of 1d5+1 corruption points, or 1d5+1 Insanity points. In return, gain Dark Soul talent, and one Forbidden Lore (choose any) as a trained basic skill.
Calamity: Gain Light Sleeper and your choice of Hardy, or Nerves of Steel talent. Reduce profit factor by -1
Fortune: +1 fate point.