My Father was 1st Lieutenant on HMS Northern Sky (LH column about 1/2 way up). They were among the first ships in to the beach (Sword) carrying engineer frogmen who were to dismantle tank obstacles.
This was their chart of the assault.
I remember him describing how the air was black with aircraft and the enormous barrage fired over their heads from the battleships behind.
Having dropped their frogmen they were to retire out of the way of the landing craft and were considered 'disposable' if hit! Thus he had a grandstand view of the landings.He said that he was extremely glad that he was on his ship and not on the beach.