How planes fly over the Atlantic Ocean

If you’re interested in how it is that, without radar available to air traffic control, airplanes can fly over the Atlantic Ocean without flying into each other, this video from NATS about the Shanwick OCA is a fascinating one.

The video features a walkthrough of an Aer Lingus flight from Dublin to Boston, EIN137.  In a delightful coincidence, last night around midnight the return Boston-Dublin flight, EIN138, flew over Prince Edward Island at 37,000 feet:

EIN138 flies over PEI