The most difficult thing about night DL was lining up with the deck centreline; in the smaller carriers like Hermes and Centaur, designed for the Venom and Seahawk, there was not a huge lateral space for a 50ft wingspan Sea Vixen, especially when some centreline lights were out ( sometimes only 2 or 3 left ) and the aircraft had a yawdamper system which meant it liked to continue in a straight line when you wanted to turn it. Late on in my experience some really clever bod had the idea of dropping a donkey's plonk of lights over the stern from the deck centreline which reduced the lineup problem hugely, in that when lined up properly there was a straight line of lights, and if you went off centre the line showed an angle in it rather than a continuous straight line. Whoever it was should have been elevated to just below the guys who invented the angled deck and the landing mirror system.