You can use satisfactory calculator to see them in the map

You can also upload your save file and see which ones you have and the ones you need to collect

https://satisfactory-calculator.com/

Originally posted by Grandpa:

Is there an easier way to find them, like the crash site maps, earlier in the game while still without flight? Major pain without advanced/MOD settings.

If you have a worldwide power network, you can set up radar towers