At 10 : 55 , Lexington 's CXAM - 1 radar detected the inbound Japanese aircraft at a range of 68 nmi ( 78 mi ; 126 km ) .
At 10 : 55 , Lexington 's CXAM - 1 radar vectored nine Wildcats to intercept .
At 10 : 55 , Lexington 's CXAM - 1 radar detected the inbound Japanese aircraft at a range of 68 nmi ( 78 mi ; 126 km ) and vectored nine Wildcats to intercept .