If you use the Classic books, and go with it is not possible to raise any skill level more than 1 in a term, you pretty much have an automatic cut-off for very high skill levels.
Well, depending on career, you could get up to 5 levels in one term...
Army:
Rifle-1
1st skill roll: Rifle-2
2nd skill roll: Rifle-3
commission skill roll: Rifle-4
promotion skill roll: Rifle-5
So you have SMG-1, Rifle-5...
Or if you allow all the rolls AFTER taking the SMG-1 for Lieutenant, then you could have SMG-5, Rifle-1...
By the same logic, a Marine character could have Cutlass-5 or Revolver-5.
A Scout could have Pilot-3.
Anyone from Navy, Marines, Army, or Merhants could have a level-4 skill in anything possible from their tables.
A Scout or Other could have any level-2 skill from their tables.
Frank
p.s. as a quick aside, it took me one refresh to get Rifle-5, SMG-1 with this use of the Classic Traveller Generator:
http://www.mindspring.com/~ffilz/Ga...999&hunt=skill&skill=Rifle&level=5&maxterms=1
The first attempt found nothing in 10,000 character, the 2nd attempt on the 531st character. Note that the above URL bypasses enlistment, so that was 10,531 characters that succeeded enlisting into the Army so they were eligible for promotion term-1...