Original World War 2 business industry trade magazine vintage ad for GOODYEAR.  Watchdog of the Convoys.  No patrol is more feared by the undersea wolves, for the military blimp airship can see beneath the sea.  It flies low enough and slow enough to spot the tell tale shadow of a submarine skulking many fathoms deep.  And once it sights the quarry, it can hover motionless above to drop depth charges with devastating effects. Goodyear Navy blimps.  Old 1943 WW2 era propaganda magazine advertisement.