No hint on how to extend range when no exploration location is reachable

Issue description

I've tried a few seeds now where I don't find the Radar System II before I run out of locations within range of my ship.

Expected behavior

I would expect the seed to guarantee that one can eventually get to all locations.

Reproduction steps

Game seed example: iiqom4kh6uay

Game version

v0.4.8

Looks like I needed to research engines which also give range instead of just speed like listed.

Glad you figured it out, @MichaelGoulding [github] !

Reopening and changing title as this should be improved documentation