Auto-Mix 17 Ceiling, effect of oxygen on 3 Dangers with oxygen 50 Demand oxygen system 7 Demand type masks 8 Duration of oxygen supply B-17 38 B-24 44 Method of computing 40 Emergency valve 19 Explosive Decompression 61 Flow indicator 32 Hazards of oxygen-lack 1 Leaks in oxygen lines 49 Leaks in regulator 11 Mask, Demand Fitting to face 9 Technic, at altitude 13 Testing for leaks 10 Mask-Regulator connection 16 Night Vision 2 Oxygen cylinders 37 Oxygen deficiency at altitude 3 Oxygen installation, Servicing of 47 Oxygen discipline 4 Oxygen systems B-17 36 B-24 43 B-29 57 Oxygen systems, diagrams of B-17 38 B-24 47A B-29 60 Oxygen equipment, check of 34 Portable oxygen equipment 20 Precautions with demand system 34 Passing out at altitude 51 Pressure Cabins, B-29 56 Regulator, Demand A-12 17 A-13 20 Regulator hose clip 16 Revival of passout victim 51 Servicing oxygen installations 47 Signal assembly 32 Sniff-tester 11 Testing for mask leak 10 The B-29 at High Altitude 53 Walk-around bottle 20 Walk-around bottle Uses of 20 Large, for engineer 25 When to use oxygen 1 INTRODUCTION As a member of a heavy bomber team, in combat you will be living and fighting in a world where man has no business--from three to six miles above the environment for which nature designed you. Successful and effective operation of combat crews at altitudes in excess of 15,000 feet requires that EVERY crew member be familiar with altitude problems. You must be so thoroughly familiar with your oxygen equipment that you will use it PROPERLY without giving it a thought. The time to acquire this experience is during operational training--not after you have pulled several boners in combat. Through long hours of tiring training you have developed superior judgment, ability to make decisions quickly, and efficiently in firing and in other duties. Most of your training has been confined to relatively low altitudes in a relatively "normal" environment. Now you are going to continue this training "upstairs". To maintain the superiority and efficiency you possess OXYGEN MUST BE USED above 10,000 feet. Above 18,000 feet oxygen must be used to maintain consciousness and life itself. WHEN SHOULD FLYERS USE OXYGEN? (1) When wounded, especially with injuries accompanied by hemorrhage or shock. (2) Above 10,000 feet on day missions, both in training and combat. (3) From ground up on all night missions. (a) To prevent night blindness. (b) Night vision impaired early and to a marked degree at comparatively low altitude. HAZARD OF OXYGEN-LACK (1) At 12,000 to 15,000 feet (several hours): fatigue, drowsiness, headache.