Celestial LOPs Quiz Q

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
3020.0'N, Lo 7305.0'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 3004.6 N Lo 7243.8 W
Rounded to L 3005 N Lo 7244 W
L 30 08.4 N Lo 7237.4'W
Rounded to L 30 08 N Lo 7237'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 2947.0'N, Lo
7256.5'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 to L 29 44N Lo 7253'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