the scope picture took a more solid appearance once the plane was 

 over the ice. By working back toward the open water the edge 

 could often be detected and followed. The AN/APS-15A radar 

 had a great advantage for this type of work because of its much 

 better definition properties. The action of this radar in areas of 

 field ice leaves little to be desired. 



Air-borne radar of either the AN/APS-3 or AN/APS-15A type 

 has proved to be a useful tool in air scouting for ice. In the hands 

 of capable operators these radar sets enable a search to be carried 

 out in low visibility with a fair degree of success. However, here 

 again it must be remembered that targets cannot ever definitely be 

 classed as ice targets unless they are seen visually as many objects 

 other than bergs give almost identical echo returns. 



S. GOVERNMENT PRINTING OFFICE: 



188 



