Na'vi aliens were always friends with people from Earth. They occasionally come to visit.
They also happen to be geocaching fans; but geocaching.com only works for Earth ;)
So to maintain friendship with humans, they hid a cache on Earth, luckily on Malta!!
To test us Human, they left the coordinates in Na'vi numbers...
Ubj znal svatref qb An'iv nyvraf unir ba obgu gurve unaqf?
Erzrzore : ahzoref ner ONFRQ ba gur nzbhag bs svatref...