CT Edition Differences

[aramis]

Classic Traveller has two major editions: "CT-77" and "CT-81".

The pre-81 vs post 81 changes are pretty impressive:

• change of damages from Xd+Y to Xd
• Surprise DM's (more in 2E)
• Encounter distance table has more terrain types on the DM's table.
• Combat movement handled slightly differently.
• Changes in ship design requirements
  • in 1E, PP≥MD, in 2e PP≥max(MD, JD))
  • In 1E, computer must be able to run the correct jump prorgam, in 2E, it must have a model number at least equal the Jn.
  • Changes in the drive performance table
  • Changes in standard hull construction times (2E less across the board)
• changes in nature of space encounter tables
• Changes in ship combat scale (1E: 1"=1000mi, 10 minute turns; 2E: 1cm = 1000km, 1000s)

Noting the performance differences in the Bk2 drive tables:

Tonnage	Drives	1E	2E
3000	Y	3	2
2000	J Z	– 5	1 6
1000	E,F,G W X Y	– 4 4 5	1 5 6 6
800	DE XY	– 5	1 6
600	C	—	1
400	B	—	1

MGT has a different table still, just for reference.

There are some further fairly minor changes from the 81 edition in the Traveller Book and Starter Traveller.