Sight Reduction and Plotting by the NASR Method Quiz
Sight Reduction and Plotting by the
NASR Method
Quiz
Global Navigation
Chapter 5
1
Question 1
The
NASR
method of sight reduction
uses tables contained in the
___ ____
___________________
to solve
for the
first triangle.
2
N
a
u
t
i
c
a
l
A
l
m
a
n
a
c
Question 2
What are the entering arguments
for the
NASR
tables to solve for
the f
irst
?
Assumed Lat and Assumed LHA
.
3
Question 3
In order to find F for the second
triangle it is first necessary to
determine the sign of Dec.
How is
this determined
?
If the body is in the opposite
hemisphere from the elevated
pole, Dec is negative.
4
Question 4
In the
NASR
method, an Assumed Position
is used. The Assumed Lo is chosen as
:
a.
the whole degree closest to the DR Lo
.
b.
the whole degree less than the DR L
o.
c.
the nearest position to the DR Lo for which
the LHA is a whole degree
.
d.
the whole degree of the L
.
5
Question 5
In the
NASR
method, the Assumed
Latitude is chosen to be within
____ of your DR or
known
position
.
6
3
0
’
Question 6
Your position is L33° 15' N, Lo 46°20'
W. GHA Schedar is 236° 55'. What will
you choose as your Assumed Latitude
and Assumed Longitude
?
GHA Schedar
236°55’
Asm Lo (-)
45°55’ (because 46°55’
would be more than 30’ from DR
longitude (Lo046°20’)
.
7
S
o
l
u
t
i
o
n
:
A
s
m
L
3
3
°
N
A
s
m
L
o
0
4
5
°
5
5
’
W
T
h
e
a
s
s
u
m
e
d
l
a
t
i
t
u
d
e
i
s
L
3
3
°
N
w
h
i
c
h
i
s
w
i
t
h
i
n
t
h
e
3
0
’
l
i
m
i
t
f
r
o
m
D
R
L
3
3
°
1
5
’
N
.
Question 7
The
NASR
solution may be used
for bodies at any altitude
.
a. True.
b. False.
8
Sight Reduction and Plotting by the
NASR Method
Quiz
End of
Global Navigation
Chapter 5
9
Explore the NASR method of sight reduction through this quiz, covering topics such as using tables from the Nautical Almanac, entering arguments for NASR tables, determining signs of Dec, choosing Assumed Position in NASR method, and more. Test your knowledge on celestial navigation with these insightful questions and solutions.
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Presentation Transcript
Sight Reduction and Plotting by the NASR Method Quiz Global Navigation Chapter 5 1
Question 1 The NASR method of sight reduction uses tables contained in the ___ ____ ___________________ to solve for the first triangle. Nautical Almanac 2
Question 2 What are the entering arguments for the NASR tables to solve for the first? Assumed Lat and Assumed LHA. 3
Question 3 In order to find F for the second triangle it is first necessary to determine the sign of Dec. How is this determined? If the body is in the opposite hemisphere from the elevated pole, Dec is negative. 4
Question 4 In the NASR method, an Assumed Position is used. The Assumed Lo is chosen as : a. the whole degree closest to the DR Lo. b. the whole degree less than the DR Lo. c.the nearest position to the DR Lo for which the LHA is a whole degree. d. the whole degree of the L. 5
Question 5 In the NASR method, the Assumed Latitude is chosen to be within ____ of your DR or known position. 30 6
Question 6 The assumed latitude is L33 N which is within the 30 limit from DR L33 15 N. Your position is L33 15' N, Lo 46 20' W. GHA Schedar is 236 55'. What will you choose as your Assumed Latitude and Assumed Longitude? GHA Schedar 236 55 Asm Lo (-) 45 55 (because 46 55 would be more than 30 from DR longitude (Lo046 20 ). Solution : Asm L 33 N Asm Lo 045 55 W 7
Question 7 The NASR solution may be used for bodies at any altitude. a. True. b. False. 8
Sight Reduction and Plotting by the NASR Method Quiz End of Global Navigation Chapter 5 9
