8 Plotting Celestial LOPs Homework Q

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Plotting Celestial LOPs
Homework Q A
Junior Navigation Chapter 8
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Objectives Set up a USPS Constant Latitude
Scale (CLS) Small Area Plotting Sheet (SAPS).
Plot a single celestial LOP. Plot a celestial
running fix.
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Practical Exercise 1. Follow the Student Manual
for guidance.
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2. Plot the following data. Use a different CLS
sheet for each plot. Establish the EP and record
its coordinates to the nearest minute in the
lower part of the plot. DR L DR
Lo ZT a Zn
Body a. 2319.6'S 6714.2'W 0524
3 nm A 101 Sun LL EP L 23
19.2'S, Lo 67 17.2'W rounded to L 23 19'S,
Lo 67 17'W b. 1419.5'N 15249.8' E
1810 4 nm T 228 Sun UL EP
L 14 16.9'N, Lo 152 46.6'Erounded to L 14
17'N, Lo 152 47'E
Solution CLS Plot Click to view Figure IM08-2a
Solution CLS Plot Click to view Figure IM08-2b
Ref. 15 - 23
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3. Refer to the USPS SR96 Forms you started in
Chapter 6, Homework 6a 6b, and completed in
Chapter 7, Homework 15a 15b. Plot the data
that resulted from these calculations. Use a
different CLS sheet for each plot. Establish the
EP and record its coordinates to the nearest
minute in the lower part of the plot. a. EP
L 30 07.1'N, Lo 85 41.7'W rounded to L 30
07'N, Lo 85 42'W b. EP L 41 16.4'N,
Lo 73 04.8'Wrounded to L 41 16'N, Lo 73
05'W
Solution CLS Plot - Click to view Figure IM 8-3a
Solution CLS Plot - Click to view Figure IM 8-3b
Ref. 15 - 23
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4. Plot the following data using a CLS sheet for
the plot. Reduce each sight of the sun by
calculator method and plot the 0800 EP and the
1200 Running Fix positions. Record the 1200 RFix
coordinates to the nearest minute in the lower
part of the plotting sheet. Refer to Appendix
B, Excerpts from the Nautical Almanac. Date is 06
December. The course is 140 True speed is 15
knots. Height of eye is 8.0 feet. Index
correction is 2.2'. Watch error is 1 second
fast.
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Problem 4. Continued from previous slide Data
for the 0800 Sun LOP is DRL DRLo
Watch Time hs
body 454.6'S 4510.3 'E 08-00-09
3136.3' Sun LL At 1020, you change course
to 015 True, Speed is maintained at 15 knots.
Data for the 1200 Sun LOP is DR L DR
Lo Watch Time hs
body(determine from CLS plot) 12-00-25
71 52.3' Sun LL Solution SR by calculator
method and CLS Plot.
Click to see Figures IM 8-4a, 4b 4c
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4. Continued from previous slide RFix (Sun
LOPs) L 454.2'S, Lo 4545.1'E rounded to L
454'S, Lo 4545'E 0800 Sun intercept 4.0nm
T, Zn 1141200 Sun intercept 3.9 nm A, Zn
189 1200 DR L 457.3', Lo 4539.4'E
Ref. 15 20 29 - 32
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Plotting Celestial LOPs
End Of Homework Q A
Junior Navigation Chapter 8