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Radar System Engineering

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198 THE GATHERING AND PRESENTATION OF RADAR DATA [SEC. 613<br />

6.30). A single Yagi on each side is used as a common transmitting and<br />

receiving antenna. The indication and the method of use of this equipment<br />

are the same as those of the ASV Mark II.<br />

With the introduction of microwave airborne radar, sea-search equipment<br />

giving a map-type indication became practicable. Pilotage within<br />

50 to 100 miles of islands or coastlines is very greatly facilitated by such<br />

“.<br />

i.,<br />

1<br />

. . . .. . . .. .. . ,. -.,. ... . .. .— >&. . .—...- ..”.,.<br />

FIG, 6.30.—ASB antenna.<br />

radar equipment, and the ad~antage of coverage of the complete field of<br />

view by such scanning radar (instead of coverage of the two sectors<br />

viewed by the equipments just described) is important in sizing up a complicated<br />

target situation. Only the bulk and weight of early microwave<br />

airborne radar militated against its use for sea search; these difficulties<br />

have now been overcome.<br />

Since homing, as Well as search, is important, special provision is<br />

, ,= add

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