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ASSIGNMENT 10
Textbook Assignment: "Celestial Observations and Sight Reduction Methods (continued),"
chapter 9, pages 9-5 through 9-31.
10-8.
What is the true declination?
IN ANSWERING QUESTIONS 10-1 THROUGH 10-18
REFER TO FIGURES 9-1, 9-2, 9-3, AND 9-4 IN
YOUR TEXT AND TO THE FOLLOWING SITUATION:
YOUR SHIP IS UNDERWAY IN THE ATLANTIC AND
YOU MUST FIGURE GYROCOMPASS ERROR BY
AZIMUTH OF THE SUN. THE DATE IS 17
NOVEMBER 1984, THE DR LATITUDE IS 31°28'N,
AND LONGITUDE IS 36°25'W. THE ZONE TIME
08h43m51s, AND YOU OBSERVE THE SUN'S
10-9.
1.
S 19° 00.0'
2.
S 19° 03.4'
3.
S 19° 05.0'
4.
S 19° 12.6'
The DR latitude and the
declination are the same.
10-2.
10-3.
10-4.
10-5.
10-6.
10-7.
observation?
1.
041h43m51s
2.
05h43m51s
3.
06h43m51s
4.
10h43m51s
What is the GHA?
1.
213°46.0
2.
228°45.0
3.
278°44.1
4.
333°45.0
What is the tabulated declination?
1.
S 19°04.6'
2.
S 19°08.8'
3. S 19°00.3'
4.
S 18°59.7'
What is the d Corr?
1.
-0.4
2.
+0.4
3.
-0.6
4.
+0.6
What is the Total GHA?
1.
343°46.4'
2.
343°42.8'
3.
344°42.8'
4.
344°43.4'
What is the DR longitude, and how
is it applied?
1.
36°25'W, added
2.
36°25'W, subtracted
3. 38°83'W, added
4.
38°83'W, subtracted
What is the LHA?
1.
308°16.9
2.
308°17.6
3.
308°18.3
4.
308°23.4
AZIMUTH AT 129.5°.
10-1.
What is the GMT of the
10-10.
10-11.
10-12.
10-13.
10-14.
10-15.
10-16.
1.
True
2.
False
What information must be known to
enter H.O. Pub 229?
1. LHA, latitude, declination
2.
GHA, latitude, declination
3.
GHA, longitude, declination
4.
LHA, longitude, declination
What is the tab z?
1.
127.8°
2.
128.2°
3.
129.6°
4.
129.9°
What is the Dee Corr?
1.
0.0
2.
+.03
3.
-.04
4.
+.04
What is the Lat Corr?
1.
+0.1
2.
+1.1
3.
-0.4
4.
+0.4
What is the LHA Corr?
1.
-0.1
2.
-0.2
3.
+0.2
4.
+0.3
What is the Total Corr?
1.
-0.2
2.
+0.3
3.
-0.5
4.
+0.5
What is the exact ?
1.
128.0°
2.
128.1°
3.
129.8°
4.
130.0°
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