A、Ground waves
B、Skywaves
C、Either ground waves or skywaves interchangeably
D、An average between ground wave and skywave positions
更多“The loran lines drawn on navigation charts represent（）.”相关的问题
A、erase the entry and rewrite B、draw several lines through the entry，rewrite，and initial the correction C、completely black out the entry，rewrite，and initial the correction D、draw one line through the entry，rewrite，and initial the correction
A、erase the entry and rewrite B、draw several lines through the entry，rewrite，and initiate the correction C、completely black out the entry，rewrite，and initiate the correction D、draw one line through the entry，rewrite，and initiate the correction
A、The bottom samples and fathometer reading prove the loran fix is reliable B、The bottom samples and fathometer readings indicate that the loran fix is unreliable C、The information collected indicates that the fathometer may be in error D、The information collected indicates that the chart is most likely in error
A、draw a one line diagram of the circuitry B、test all fuses and measure the line voltage C、take megger readings D、insulate the apparatus from ground
A、A.draw a one line diagram of the circuitry B、B.test all fuses and measure the line voltage C、C.take megger readings D、D.insulate the apparatus from ground
A、every station in one chain to transmit at the same time B、each station to transmit without reference to another station C、on-line transmission of single-line transmitters at the same time D、each station to only depend on the master for synchronization and signal ratio
A、A.on loran charts covering areas where sky waves are used B、B.in the Radio Aids to Navigation，PUB 117 C、C.in the Loran-C Correction Tables D、D.Sky waves cannot be matched to ground waves in LORAN-C to produce a usable reading
A、draw the liquid in；force the liquid out B、force the liquid out；draw the liquid in C、suction；draw D、deliver；outlet
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