Howdy Rupert,

Book 5 HG 5 1st edition 1979 p. 32 agrees with you: "Ships produced according to this book already have the jump governor as part of their drives."

In Book 2 2nd edition and Book 5 2nd edition there is no mention of jump governors.

Tom Rux

> On 04/28/2023 6:03 PM Rupert Boleyn - rupert.boleyn at gmail.com (via tml list) <xxxxxx@simplelists.com> wrote:
>
>
> On 29Apr2023 1133, Christopher Sean Hilton - chris at vindaloo.com (via
> tml list) wrote:
> > On Fri, Apr 28, 2023 at 03:08:22PM -0700, Traveller Mailing List wrote:
> >> Hello Jeffery,
> >>
> >> My understanding of CT LLB 2 1st ed 1977 is that a ship's jump drive used all the jump
> >> fuel regardless of the actual jump made. A ship with a J2 drive can make a 1 parsec jump
> >> but will use all the fuel. My understanding is based on the following guideline:
> >>
> >> CT LLB 5 Hg 1st edition 1979 p. 32 "Jump Governor: It is possible to procure a jump
> >> governor for ships produced according to Book 2. It allows such a ship to utilize fuel
> >> more efficiently; instead of consuming all fuel when performing a jump, regardless of the
> >> jump number, the ship will consume fuel equal to 0.1MJn, where Jn is the actual jump
> >> number used, rather than the maximum jump number available. Available at any industrial
> >> world with tech level 10 or higher. Cost Cr300,000. Mass 1 ton. Ships produced according
> >> to this boo already have the jump governor as part of their drives."
> >>
> >> Of course I could be out to lunch on my understanding.
> >>
> > So the early rules seem, especially the addition of Jump Governers from CT LBB 5, to support
> > the idea that you can determine where you come out of Jump where you want to and that an
> > "anchoring mass" at the other end isn't required. It's later rule sets that seem to talk
> > about some sort of an "anchoring mass" in the form of a conveniently located brown dwarf
> > star.
> >
> > IMTU I just assume that some technology is ubiquitous. Jump Governers and Fuel purification
> > plants are in that category. Because from an economic perspective, their utility value is so
> > much higher then their cost.
> IMTU I assume that jump governors as a special features was a thing in
> the long past. By the late Imperium and New Era they were simply part of
> the jump system and nobody would think of them as anything special, or
> even at all unless they broke down and needed repair or replacement
> (just like any other component of the jump drive).
>
> As for 'void' jumping - that too was something that was hard or
> impossible in the long ago. In the 'modern' day it's still a bit tricky,
> so most captains prefer to avoid it if possible. Due to the lack of a
> good clean gravity well at the destination it's hard to 'land'
> accurately in the void, which wouldn't really matter, except that you
> need to know exactly where you are to be able to plot a course for the
> next jump - the difficulty compounds over the jumps if there's no
> 'anchor' at one or both ends. For a skilled crew this isn't a big deal,
> especially if they're not in a hurry and can take their time checking
> and rechecking their astrogation. For a mediocre crew in a ship that
> lacks a sensor suite good enough to find iceballs out in the Great Dark,
> it's scary.
>
> This is why the IN's fuel depots out in the rift are known as
> 'calibration points' - they're are not just a whole lot of fuel, but
> even the ones that aren't located on or by some massive object  have
> their location carefully surveyed, so if you jump from one you already
> have your departure location precisely known, removing that uncertainty
> from your astrogation task.
>
> --
> Rupert Boleyn <xxxxxx@gmail.com>
>
> -----
> The Traveller Mailing List
> Archives at http://archives.simplelists.com/tml
> Report problems to xxxxxx@simplelists.com
> To unsubscribe from this list please go to
> https://www.simplelists.com/confirm/?u=6RL9QEFp1exJPvdHBHNQVTeyGVbBzb7E