What are the points 1864 and 1922 on this in-flight map?
The number may stands for the year of the ships sunk.

1864 may correspond to CSS Alabama (Arabic: ألاباما), a Confederate States Navy Screw sloop which was sunk on June 1864 at the Battle of Cherbourg. The wreck is at 49°45′9″N, 1°41′42″W.

1922 may correspond to SS Egypt (Arabic: مصر), a British ocean liner which was sunk after a collision with SS Seine on 20 May 1922. The wreck is located near 48°10′N, 5°29′W.



As @mins mention in comment, there are other wrecks appearing on the map in IFE, including Mary Rose 1545 near Portsmouth and San Pedro de Alcantara 1786 near Peniche.