The Northern Mariana Islands are due East from Manila. All coverage has a visible long antenna at the front of the car, just like Guam. Look out for wooden utility poles, which are favoured in the Northern Mariana Islands, over the concrete poles in Guam.
Plates
Tall and narrow white plates with black or blue lettering.
Road markings
Road signs
Poles
Scenery
Car metas
The biggest tell for Guam, Northern Mariana Islands, and Puerto Rico is the large antenna on the front right corner of the camera car.
