Presence in Search Area (radiotelegraphy)在搜索区域(radiotelegraphy) Perseus Software Products survey elements珀尔修斯联合软件产品调查的元素 Are you in the search area designated as (latitude and longitude)?你在搜索区域被指定为(纬度和经度)吗? UnitedGlobalCom, Inc. optionsUnitedGlobalCom公司选项