Editing V-1 flying bomb (section)

===Countermeasures at Antwerp===
Both British ([[80th Anti-Aircraft Brigade]]) and US Army anti-aircraft batteries (30th AAA Group) were sent to Antwerp together with a searchlight regiment. The zone of command under the [[21st Army Group]] was called "Antwerp-X" and given the object of protecting an area with a radius of {{cvt|7,000|yd|order=flip}} covering the city and dock area.{{sfn|Defense Technical Information Center|1971|p=34}} Initially attacks came from the south-east, accordingly a screen of observers and searchlights was deployed along the attack azimuth, behind which were three rows of batteries with additional searchlights.{{sfn|Defense Technical Information Center|1971|p=36}}

US units deployed [[SCR-584 radar]] units controlling four [[90 mm Gun M1/M2/M3|90 mm guns]] per battery using an [[Director (military)|M9 director]] to electrically control the battery guns.{{sfn|Defense Technical Information Center|1971|p=40}} British gun batteries were each equipped with eight [[QF 3.7-inch AA gun]] (94 mm) and two radar units, preferably the US SCR-584 with M9 director as it was more accurate than the British system.{{sfn|Defense Technical Information Center|1971|p=45}} The radar was effective from {{convert|28,000|yd|m|order=flip|abbr=on}}, the M9 director predicted the target location position based on course, height and speed which combined with the gun, shell and fuse characteristics predicted an impact position, adjusted each gun and fired the shell.{{sfn|Defense Technical Information Center|1971|p=51}}

In November attacks began from the north-east and additional batteries were deployed along the new azimuths, including the [[184th AAA Battalion (United States)]] brought from Paris. Additional radar units and observers were deployed up to {{cvt|40|mi|order=flip}} from Antwerp to give early warning of V-1 bombs approaching.{{sfn|Defense Technical Information Center|1971|p=53}} The introduction of the [[VT fuse]] in January 1945 improved the effectiveness of the guns and reduced ammunition consumption.{{sfn|Defense Technical Information Center|1971|p=68}} From October 1944 to March 1945, 4,883 V-1s were detected. Of these, only 4.5 percent fell into the designated protected area.{{sfn|Defense Technical Information Center|1971|p=54}}