Aircraft separation over the Atlantic

[11Fan]

No Worries

DaiB,

First off, welcome to PPRuNe.

There are a number of methods used to maintain separation. As the other aircraft was - as you say - "some distance", there is a possibility that there may already have been a vertical separation of 1000 feet. In addition, I would also suspect that both aircraft would have had Traffic and Collision Avoidance Systems (TCAS) active and very likely were aware of each others presence.

Quite frankly, and not intending to alarm you, it's usually the ones you don't see…... but then again, that's what TCAS is for.

I'm fairly certain you were fine. Add to that, relative distance is somewhat distorted at speed and elevation.

Happy flying, and again, welcome to PPRuNe.

Best regards,

11Fan.