Mr. Riddle

Well, I, of course, can´t help but agree with Cole that when a man is setting up there in the front office of an airplane, he would like to know whether the equipment is working or not. However, there must be some limit to which you can carry that sort of thinking because if you are going to say you have a checking system on the ground and then we say “now that is not good enough, we had better have one in the airplane” so then we have a checking system in the airplane and pretty soon someone says “Now let´s have a checker to check the checker” and if we carry this too far, we eventually exceed some practical limit. I think there is a fine line between equipment design and practical considerations and so long as the design people thoroughly understand what happens when the guy in the front office starts to get bum instruments, we have got the problem half licked right there.