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3-29.
What information must be known to
figure an amplitude of the Sun?
1.
DR latitude, DR longitude,
d e c l i n a t i o n ,
and true bearing
to the Sun
2.
LMT, DR latitude
a n d t r u e b e a r i n g
3.
LMT, DR latitude
d e c l i n a t i o n , a n d
d e c l i n a t i o n ,
to the Sun
DR longitude,
t r u e b e a r i n g
to the Sun
4.
LMT, D R l a t i t u d e , d e c l i n a t i o n ,
and true bearing to the Sun
YOUR SHIP IS STEAMING IN THE NORTH
ATLANTIC, AND YOU FIGURE AN AMPLITUDE.
YOUR DR LATITUDE IS 38° 08.1'N.
THE
DECLINATION IS S 21° 00.0'.
THE SUN'S
POSITION IS SETTING AND THE SUN'S TRUE
BEARING 245.2°T.
IN ANSWERING QUESTIONS 3-30 THROUGH 3-34,
REFER TO FIGURE 9-7 IN YOUR TEXT.
3-30.
3-31.
3-32.
3-33.
3-34.
How is the amplitude labeled?
1.
E 27.1 N
2.
W 27.1 S
3.
E 27.7 S
4.
W 27.7 N
What is the azimuth?
1.
062.9°
2.
117.1°
3.
242.9°
4.
297.7°
What is the gyro error?
1.
2.3°W
2.
2.5°W
3.
2 . 7 ° E
4.
3 . 1 ° E
T h e s h i p ' s l a t i t u d e i s 3 7 ° 0 0 . 8 ' N
a n d t h e d e c l i n a t i o n i s S 2 0 . 0 ° .
What is the azimuth?
1.
25.0°
2.
25.3°
3.
25.4°
4.
25.7°
T h e s h i p ' s l a t i t u d e i s 3 9 ° 3 5 ' 0 N
a n d t h e d e c l i n a t i o n i s S 2 2 ° 4 8 ' .
What is the azimuth?
1.
29.4°
2.
29.5°
3.
30.2°
4.
30.4°
3-35.
Your ship is on the Equator and the
d e c l i n a t i o n i s N 1 8 ° 5 1 ' .
What is
the azimuth?
1.
18.5°
2.
18.8°
3.
18.9°
4.
19.0°
3-36.
Which of the following rules for
figuring an amplitude is expressed
c o r r e c t l y ?
1.
Setting Sun with north
d e c l i n a t i o n ,
add amplitude to
090°
2.
Setting Sun with sough
d e c l i n a t i o n ,
subtract amplitude
from 090°
3.
Setting Sun with north
d e c l i n a t i o n ,
add amplitude to
270°
4.
Setting Sun with south
d e c l i n a t i o n ,
s u b t r a c t a m p l i t u d e
from 270°
3-37.
W h a t i s t h e c o r r e c t f o r m u l a f o r
f i g u r i n g a m p l i t u d e i n s o u t h
l a t i t u d e ,
w i t h n o r t h d e c l i n a t i o n ,
a n d t h e S u n i s r i s i n g ?
1.
090° - amplitude
2.
090° + amplitude
3.
279° - amplitude
4.
270°
+ amplitude
3-38.
When using Bowditch (tables),
volume II,
i n a d d i t i o n t o t a b l e 2 7 ,
w h e n i s t a b l e 2 8 u s e d t o f i g u r e
amplitude?
1.
When the ship is in southern
l a t i t u d e s
2.
When the ship is on the Equator
3.
If the body is observed when
its center is on the celestial fix?
horizon
4.
If the body is observed when
i t s c e n t e r i s o n t h e v i s i b l e
horizon
3-39.
What is the most accurate method of
o b t a i n i n g a c e l e s t i a l f i x ?
1.
Take many sightings in a short
period of time
2.
Take a few sightings in a short
period of time
3.
Take as many sightings as you
can in 15 minutes
4.
Take 6 or more sightings in
15-30 minutes
12
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