As I recall, “early” jump requires an endpoint.

Later, like in the 3i, jump tech and computers have gotten good enough to allow jump to exit anywhere.

So it depends on TL and the era.

I’m sure grandfather has some even better jump tech (human sized? No restrictions on 100d limits? Both?)

Sent from my iPhone

> On Apr 27, 2023, at 4:10 PM, Hubert Figui?re - hub at figuiere.net <xxxxxx@simplelists.com> wrote:
>
> On 2023-04-27 18:56, Hubert Figui?re - hub at figuiere.net (via tml list) wrote:
>>> On 2023-04-27 17:17, Christopher Sean Hilton - chris at vindaloo.com (via tml list) wrote:
>>> Hi,
>>>
>>> I have a question about the mechanics of jump drive. Did I read somewhere that in a nominal
>>> jump trip, you precipitate out of Jumpspace at the 100D limit of a target object in normal
>>> space? If this is the case, how do you handle jump into empty hexes?
>>>
>> The way I always interpreted it is that the 100D was the *minimum* safe distance you could reemerge from jump space.
>> If you reemerge in an empty hex, the bigger problem will be whether you have enough fuel. This is also part of the problem when you have a jump mishap and arrive in a place where there is no giant gas available.
>> In GURPS Traveller Interstellar War, they describe how Terra reached neighbouring system with Jump-1: the established refueling stations, which just support this interpretation.
>
> An now re-reading it,
>
> page 22:
>
> (in 2092 AD)
>
> > No other star systems were within a parsec of Sol, and the mathematics
> > of jump navigation seemed to imply that a jump into empty space was
> > not possible.
>
> Which contradict what I just said :-/ Albeit its wording remain speculative.
>
> Going on, page 23
>
> > The target was Barnard’s Star, about two parsecs away to coreward.
>
> and
>
> > The first step was to locate a “jump point,” a wandering planet or
> > brown-dwarf star located at a convenient point in interstellar space
>
>
> Cheer,
>
> Hub
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