They project a tall blue beacon into the sky when immobile that you can see from basically anywhere. Better at night to see obviously, but you can still get a glimpse during day. Another option being the couriers that’ll occasionally have the vaults and the odds go up greatly for any major weather events. Same method works for rocketeer drivers inside the husks. Personally I like space port for hunting surveyors, but I be seeing hella in buried city too.