Longitude and latitude
https://www.bbc.co.uk/bitesize/articles/zvhkbqt
Resources and trade
https://www.bbc.co.uk/bitesize/articles/ztnyhcw
Using a compass
https://www.bbc.co.uk/bitesize/articles/z38pm39
GPS
https://www.bbc.co.uk/bitesize/articles/zrkcvwx
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