OCR Text |
Show r i vi it, ! 1 V rA t H T t- , 11 It 1 ' ! - V V 4 tI l Coast Guard cutter, miles at sea, flashes the first warning. Instrument defectors ashore report raiders off -the coast.(They may give the first alarm- Visual observers, at intervals, furnish the line of flight. Filter Board at Information Center (in bombproof quarters) receives all reports, filters out false - alarms,, charts, route . of approaching, raid,. (These Army Information 'Centers, with overlapping webs B m of communication, control large districts on seaboard nerve center of defense QJ Operations-Boar- d ) .collates information from several filter boards n large scale map!i Plotters place markers, on map showing course, altitude, number, type craft. On wall, a Status Board snows location, strength of available combat forces. Control Officer, flanked by two assistants, is in .supreme command. Other officers on gallery are coast artillery, specialists, directing emy of-en- m anti-aircra- planes, naval op- erations, bomber command, radio (FCC), and civilian defenses. Plotters swiftly map navigation data for inter"r" " cept orsf o'e nga ge h ee n e m f. Interceptor pUnes at dispersal fields (40 miles coast apart) converge on the enemy. artillery go into action. Barrage 'balloons are raised. Simultaneously, District Air Raid Wardens are notified to alert rs itian. defensesin.dangep areas. civilian aircraft (CAA), interceptor .na Anti-aircra- Jr |