For sure you do; otherwise you might wake up dead!
Incidentally, I am re-reading a book from my library called "Angel Visits" by Gp Capt Frank Griffths who was very involved with the development of autoland during WWII.
The huge problem then was how to get hundreds of bombers into their home airfields quickly when they came back from Germany damaged and their base was covered in fog.
When the USAAF came to "England" they were appalled by our lousy weather and lots of them considered that this was a bigger problem than flying over Germany.
Sperry invented the ILS system as we know it now. It was brought to UK as the "Signal Corps System 51" in early 1944. The team leader was Lt Col Francis Moseley who had been the development engineer for Sperry. He had an idea that combining an auto pilot with ILS signals could result in automatic landings.
The Americans didn't want to know but we did. So it was that he came to the RRE at RAF Defford which was a happy mixture of aircrew and boffins with great ideas. I quote:
"After he had been at Defford about a week demonstrating in our usual atrocious winter weather how the American ILS system worked he asked if he could wire up his breadboard (a plank of wood with all of the boffin's circuits wired up) to the autopilot and ILS instrument in our Liberator (4-engined bomber) to see whether the autopilot would bring the aircraft down the beam to the runway automatically".
Moseley had made up a coupling circuit on his breadboard in the cellar of his house inOsborne, Ohio with just four wires hanging from it; two to the autopilot and two to the instrument (what we would call a zero reader).
To cut a long story short, it all worked beautifully in the Liberator. The captain tripped the autopilot at the last possible second to complete the landing.
The date was February, 1944.
What exactly have we learned since?