if you've completed the nave map, go to omicron theta and go to the unknown jump hole, you'll find patrols in the clould.

Go to sector F4 of Omicron Alpha or F2 of Omicron Gamma. Nomads populate those areas. If you want more, go through the Unknown Jump Hole there, and you'll arrive in a system with lots of nomads

Yeah the unknown jump hole in F4 of Omicron takes you straight into the nomads
teritory.

there is also a jump hole in alpha with nomads both sides
looks like you havent been everywhere

The one in gamma's better it dont have radation so i would allways go there.Also it has two planets u can dock on they dont sell any thing.One has monkeys on it and the other has robots the monkeys are funny .

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But more crucially, you can pay for repairs on one of the planets (I think the robot one) so there's no limit except your credit balance on how long you can stay there hunting nomads

Be aware however, the nomads you face in these places are much much tougher than the ones you face during the SP missions. Although they don't come in such great numbers, they have more powerful weapons, and cannot be taken too lightly.

Give a man fire and he'll be warm for the night. Set a man on fire and he'll be warm for the rest of his life.- Terry Prachett