Hello MrBackman,
MrBackman said:
The canon Traveller rule of jumping beyond 100 diameters from a planet has always irritated me; why 100? (aside from the vague concept of diameter of course).
A starship does not have to jump at or beyond the 100D limit as indicated in Classic Traveller Book 2 page 6
Misjump: Each time the ship engages in a jump, throw 13+ for a misjump: Apply the following DMs: +1 if using unrefined fuel (and not equipped to do so), +5 if within 100 planetary diameters of a world, +15 if within 10 planetary diameters of a world. If the result is 16+ the ship is destroyed.
Of course the games I played in a starship >= 100D had a DM of zero, >= 10D and <100D had the +5 DM, and any jump <10D used the +15 DM.
JTAS 24 pages 34 through 38 has an article titled Jumpspace written by Marc W. Miller
I assume it came about as a way to force characters to Travel (it is called Traveller after all) a bit before entering hyperspace. I have seen no space combat system where a planet and a safe jump distance from it could ever fit on a map. To be chased from a planet to jump point, to exit hyperspace directly into action etc, all of these have been impossible due to the huge measure of distance that 100 planet diameters really is. A space combat system with ranges maps a million km large would feel a way too super science (try focusing anything but x-rays over those ranges and learn what insanely-huge-mirror means)
Per Marc W. Miller's article in JTAS 24 a starship reaches the jump point with zero velocity, which means the ship arrives with zero velocity. My guess, Mr. Miller doesn't saying anything on this that I could find, is that when the starship exits jump that it takes seconds, more likely a few minutes before ship's sensors begin detecting anything. Of course I could be out to lunch.
[/quote]I propose reducing the safe jump to 10 diameters and see what changes with the Traveller canon? Does anyone well versed in Traveller canon, adventures, fiction etc know anything that would make such a change weird or contradictory?
For an article on what 'diameter' really mean when calculating safe jump distances read this
http://vectormovement.wordpress.com/2010/05/30/100-diameters-limit/[/quote]
I'm confused the title of the topic is for a 20D limit not 10D.
Mongoose Traveller rules per Core Rulebook page 141 is a -8 DM for making a jump within the 100D limit.
Misjumps would be almost impossible to happen with the suggested change.