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Celestial Navigation Plotting Exercise

Practice plotting celestial lines of position (LOPs) and advance positions based on sun sights. Solve navigation problems to determine DR position and RFix. Enhance your skills in celestial navigation.

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Celestial Navigation Plotting Exercise

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  1. Plotting Celestial LOPs Quiz Q & A Junior Navigation Chapter 8

  2. 1. You are on a true course of 130° at a speed of 6.0 knots. At ZT 0715, your DR position is L 30°20.0'N, Lo 73°05.0'W. At 0715 you take a sight on the sun. Later at ZT 1115 you take a second sight on the sun. You reduce the sights and obtain the following data: ZT 0715: a = 3.0 mi T, Zn = 121°; and ZT 1115: a = 3.0 mi A, Zn = 172°. Plot and label the LOPs, advance your ZT 0715 LOP to the time of your ZT 1115 sight, and determine the following from your plot: Latitude Longitude a. 1115 DR position: __________ ___________ b. 1115 RFix: __________ ___________ L 30°04.6’ N Lo 72°43.8’ W Rounded toL 30°05’ N Lo 72°44’ W L 30° 08.4’ N Lo 72°37.4'W Rounded toL 30° 08’ N Lo 72°37'W

  3. Quiz Problem 8 - 1 R Fix: L 30° 08'N Lo72° 37'W

  4. 2. You are at a known position at L 29°47.0'N, Lo 72°56.5'W. You take a run of sights on the lower limb of the sun for your JN Sight Folder. Reducing the ZT 1017 sight provides you with: a = 4.7 mi T & Zn = 137° a. Plot and label the LOP and determine the coordinates of your EP _______________________ b. Is this an acceptable sight for your sight folder? ___ c. Why? ______________________ L 29° 43.6'N Lo 72° 52.8'W Rounded toL 29° 44’N Lo 72°53'W Yes Intercept is less than 5 nm

  5. Quiz Problem 8 - 2 1017 EP: L 29° 44'N Lo72° 53'W

  6. Q7 Plotting Celestial LOPs End Of Quiz Q & A Junior Navigation Chapter 8

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