Shantelle Johnson and her partner Colen Nulgit were on a fishing trip in the northern territory on Monday when their vehicle got stuck in a bog.
After spending a night in an area filled with crocodile tracks, the family overheard a plane flying by.
They went to a vacant area and carved out a giant H-E-L-P in the sand and lit fires.
Rescuers spotted the couple and got them to safety.