Because autoland systems are fully automated and extremely precise, landings made with them can be smoother than landings made by human pilots, which means that a landing at an airport completely hidden in fog may be smoother than a landing made on a clear day.
Landings made. Them can be smoother than landings. These landings are made by human pilots. Autoland systems are fully automated and extremely precise. A landing at an airport may be smoother than a landing. This landing is made on a clear day. This airport is completely hidden in fog. Human pilots means this.