New Television and Radio Services 141 



of salt water crashing over their decks, radios must not fail. 



In Flying Fortresses, where a crew of men must function 

 as one with split-second timing, communication among them 

 must not fail. 



If your favorite radio serviceman were in Cuba instead of 

 around the corner, you'd want the durability of Army radio 

 equipment in your peacetime radio. You'd know that if your 

 radio "went bad" you'd lose your favorite programs for too 

 long a time. The radios of our soldiers often must operate far 

 from the nearest serviceman. And if a soldier's radio goes bad 

 it may cost his life. 



For the radio today is not only the nerve center of mili- 

 tary strategy; it is the life line of safety. Many of the most 

 brilliant developments of today are designed to save the lives 

 of our men. 



Radio Safety Devices 



The blind-landing instruments have saved the lives of count- 

 less flyers. A fighter plane, returning from a mission, speeds 

 through the black night at five miles a minute. The pilot 

 flicks a switch. A vertical hairline crosses a dial toward a cen- 

 ter mark and passes that mark. Off course a bit. The pilot 

 changes his course until the hairline is exactly on the center 

 mark. He's on course now, heading for home. But how far 

 away is he? That is a crucial question when you're covering 

 five miles a minute. A light on his dashboard flashes. He has 

 passed a marker beacon. Twenty miles to go. He cuts his 

 speed. Another light flashes. Five miles. If there were a light 

 on his landing field, he could see it. But there is no light. He 

 hurtles into black nothingness. Suddenly a horizontal hairline 

 appears on the dial and climbs toward center. He smiles. He's 

 reached his "glide path" now. A little high he'd overshoot 

 his mark. He brings the nose down a bit. The horizontal line 



