As a long time fan of Babylon 5 I've always been fascinated by their "Jumpgate" technology, which in GURPS terms most closely resembles a Jump Gate described on page 19 of GURPS Spaceships. The main differences between GURPS and Babylon 5 hyperspace seem to be;
- the need to "open a jumppoint" to enter and exit hyperspace,
- the ability to loiter at the same relative position to the nearest strong gravity well in normal space without power (subject to gravitic drift), and
- the ability to detect other ships and maneuver relative to them and fixed hyperspace landmarks (ie. "jumpgate beacons").
As the above characteristics seemed to make dramatic sense in Babylon 5, I decided to incorporate some of them in my personal hyperspace rule set1, with a few variations. For an example of a ship constructed using these rules, see the Pathfinder class Mobile Jump Gate. If anyone is interested, I will add a page here describing the setting in more detail.
Dalton "who will have many middle names before this is done" Spence