nautical twilight造句

• On 19 August, Nautical Twilight was 04 : 31 and sunrise 05 : 50.
• Of particular concern to landing craft, H-Hour was fixed forty minutes after nautical twilight.
• Nautical twilight has military considerations as well.
• Star and planet sights are normally taken during nautical twilight at dawn or dusk, while both the heavenly bodies and the sea horizon are visible.
• This is followed by the nautical twilight, when the sun reaches heights of-6?and-12? after which comes the astronomical twilight defined as the period from-12?to-18?
• The helicopters would land just after the start of morning nautical twilight, as mission planners weighed the options of attacking under the cover of darkness or during daylight hours.
• This is followed by nautical twilight, when the sun reaches heights of  6?and  12? after which comes astronomical twilight, defined as the period from  12?to  18?
• This is a writer who knows the difference between a lead line and an air baffle, civil twilight and nautical twilight, and he writes about boats and icy seascapes with poetic pleasure.
• After the sun has also set for these altitudes at the end of nautical twilight, the intensity of light emanating from earlier mentioned lines decreases, until the oxygen-green remains as the dominant source.
• The lowest latitudes at which the various twilights can continue through local midnight are approximately 60.561?( 60?32 433 ) for civil twilight, 54.561?( 54?32 433 ) for nautical twilight and 48.561?( 48?32 433 ) for astronomical twilight.
• Between late November and mid-January the sun is so low that there is not even civil twilight, with the only exception from complete darkness being a deeper blue sky called " nautical twilight ", that occurs for a few hours in mid-day.
• At the winter solstice within the polar circle, twilight can extend through solar noon at latitudes below 72.561?( 72?32 433 ) for civil twilight, 78.561?( 78?32 433 ) for nautical twilight, and 84.561?( 84?32 433 ) for astronomical twilight.
• A civil twilight period of about two weeks occurs before sunrise and after sunset, a nautical twilight period of about five weeks occurs before sunrise and after sunset and an astronomical twilight period of about seven weeks occurs before sunrise and after sunset.
• This is followed by the nautical twilight, when the sun is 6?and 12?below the horizon ( heights of between  " 6?and  " 12?), after which comes the astronomical twilight, defined as the period from  " 12?to  " 18?
• Although Helsinki, Oslo, Stockholm, Tallinn, and Saint Petersburg also enter into nautical twilight after sunset, they do have noticeably lighter skies at night ( known as white nights ) around the summer solstice than other locations mentioned in their category above, because they do not go far into nautical twilight.
• Although Helsinki, Oslo, Stockholm, Tallinn, and Saint Petersburg also enter into nautical twilight after sunset, they do have noticeably lighter skies at night ( known as white nights ) around the summer solstice than other locations mentioned in their category above, because they do not go far into nautical twilight.
• At about 04 : 30, just before Nautical Twilight, the flotilla broke into two; one group of three LCAs continued on the same bearing toward Vasterival ( Orange One Beach ) and four LCAs followed MGB 312 to a new bearing starboard along the coast to Quiberville ( Orange Two Beach ).
• :Though not directly relevant to the question, the uncertainty of the boundaries of night and day is underlined by there being three differingly defined twilights : Civil twilight, Nautical twilight and Astronomical twilight, which begin or end when the Sun is 6, 12 or 18 degrees below the horizon respectively . { The poster formerly known as 87.81.230.195 } talk ) 13 : 24, 27 December 2016 ( UTC)