A、Bell alarm to warn the user
B、Lighted alarm signal to warn the user
C、Alternate signal keying system
D、View finder for each station
更多“Most modern Loran-C receivers，when not tracking properly，have a（n）（）.”相关的问题
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、Reflected electron B、Electrical radiation C、Quarterpoint electrical navigation D、Hyperbolic radio navigation
A、only accurate during daylight hours B、much less accurate C、only accurate at twilight D、more accurate than using ground waves
A、An atomic time standard B、Daylight Savings Time C、Eastern Standard Time D、Greenwich Mean Time
A、matching pulse rates of at least 20 stations B、an automatic on-and-off switch C、a horizontal matching of all delayed hyperbolic signals D、automatic signal acquisition and cycle matching
A、A.Less signal energy is necessary for receiver operation B、B.More signal energy is available at the receiver C、C.It significantly increases the peak power D、D.It increases the signal capacity
A、A.matching pulse rates of at least 20 stations B、B.an automatic on-and-off switch C、C.a horizontal matching of all delayed hyperbolic signals D、D.automatic signal acquisition and cycle matching
客服
TOP
查看正确答案
