Question 86Navigation Problems70% to pass
On 3 February your 0547 zone time DR position is LAT 24°18.5' N, LONG 167°25.0' E. Considering their magnitude, azimuth, and altitude, which group includes the three bodies best suited for a fix at star time?
AI Explanation
The correct answer is B) Regulus, Deneb, Antares.
This is the correct answer because at the given position and time, Regulus, Deneb, and Antares are the three celestial bodies that are best suited for obtaining a navigational fix. These three stars are bright, well-separated in azimuth, and have suitable altitudes for reliable celestial navigation at that location and time.
The other answer choices are incorrect because they do not include the optimal combination of stars for a celestial fix at the given position and time. For example, Jupiter and Venus are planets, not stars, and Arcturus and Kochab are not as well-suited for this particular celestial navigation scenario.
Related Questions
#84 On 24 March your vessel is enroute from Cadiz to Norfolk. Evening twilight will occur at 1830 zone time and your vessel's DR position will be LAT 35°06' N, LONG 60°48' W. Considering their azimuth, altitude, and magnitude, which group of stars is best suited for plotting a star fix at star time?#85 On 6 March your 1854 zone time DR position is LAT 23°51.5' N, LONG 73°14.0' W. At that time you observe Polaris with a sextant altitude (hs) of 24°16.5'. The chronometer time of the sight is 11h 52m 40s, and the chronometer error is 01m 56s slow. The index error is 5.0' on the arc, and the height of eye is 43.5 feet (13.3 meters.) What is your latitude by Polaris?#87 On 12 September your 0600 zone time (ZT) fix gives you a position of LAT 22°51.9'N, LONG 133°40.1'W. Your vessel is on course 062°T, and your speed is 12.3 knots. Local apparent noon (LAN) occurs at 1142 ZT, at which time a meridian altitude of the Sun's upper limb is observed. The observed altitude (Ho) for this sight is 70°33.2'. What is the calculated latitude at LAN?#88 On 13 November your 1030 ZT DR position is LAT 19°03'S, LONG 6°34'E. You are on course 164°T, speed 12 knots. Determine your 1200 position using the following observations of the Sun. ZT GHA DECLINATION Ho 1112 351°55.4' S 18°00.4' 88°08.0' 1121 354°10.4' S 18°00.5' 88°33.9'#89 On 10 October your 0930 zone time position is LAT 25°00.0'S, LONG 164°38.6'W. Your vessel is on course 180°T at a speed to 10.0 knots. What is the zone time of local apparent noon (LAN)?