During daylight savings time the meridian used for determining the time is located farther().
A、east
B、west
C、east in west longitude and west in east longitude
D、west in west longitude and east in east longitude
A、east
B、west
C、east in west longitude and west in east longitude
D、west in west longitude and east in east longitude
A、two red lights at night and two black balls during daylight B、two red lights at night and three black balls during daylight C、three red lights at night and two black balls during daylight D、three red lights at night and three black balls during daylight
A、Between sunset and sunrise B、Only between 8 AM and 4 PM C、During daylight hours in any visibility D、During daylight hours in unrestricted visibility only
A、between sunset and sunrise B、only between 8 AM and 4 PM C、during daylight hours in any visibility D、during daylight hours in unrestricted visibility only
A、unscrewing the bulb during the daylight B、switching the light on only when necessary C、taking no action as there is no way on saving power D、taking no action as they shut off automatically in daylight
A、only accurate during daylight hours B、much less accurate C、only accurate at twilight D、more accurate than using ground waves
A、west in west longitude and east in east longitude B、east in west longitude and west in east longitude C、west D、east
A、Secure all lighting to the main deck B、Provide a portable fan to blow away fumes C、Prohibit smoking in the area D、Display a black triangle during daylight hours
A、turn it off for five minutes every half-hour B、turn it off and on at five-minute intervals C、turn it off during daylight hours D、leave it on continuously
A、when the Moon is low in the sky at rising or setting B、at the new Moon phase C、when taking Moon sights during daylight D、when the terminator is nearly vertical