(Sorry if this has been suggested)
Gas giant orienteering:
You take a space suit, a personal thruster pack, a grav belt, lots of bottles
of LOX, and a hand computer (containing the map and some orbital mechanics
programs), and hold a orienteering contest where the different stations are
on different moons around a gas giant.
A personal reentry kit can be advisable too, and a emergency beacon.
I imagine that the difficulties would be in two areas, firstly to navigate
between the moons using a hand computer but otherwise on fully manual: In
orbital mechanics you don't go forward if you thrust forward, instead you
go upward and slow your movement relative those in lower orbits:)
Secondly to find the stations on the moons, the gravbelt won't have enough
fuel to enable you to go looking for it, so you have to be right on in the
first descent.
Asteroid belt orienteering is another option if the radiation levels around
gas giants are too high.
- -bertil-
- --
"Does that mean that the grav-belts have little propellers on them now, and if
so, does Astrid Lindgren know about that 'Karlsson on the roof' has become
a viable Traveller character?"