above (prep)
accuracy (n)
accurate (adj)
across (prep)
artificial (adj)
atomic clock
carry on (v)
catch a bus
catch a train
cliff (n)
directions
edge (n)
end up (v)
exact (adj)
explain (v)
get stuck (v)
Global Positioning System
into (prep)
keep going (v)
past (prep)
position (n)
round (prep)
route (n)
satellite (n)
satnav
second
through (prep)
turn left
turn right
up (prep)
user (n)
work out (v)
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