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ASSIGNMENT 3
Textbook Assignment: "Compasses (continued)", "Navigational Publications", and "The
Nautical Road", chapters 2, 3, and 4, pages 2-22 through 4-5.
IN ANSWERING QUESTIONS 3-1 THROUGH 3-4,
SELECT FROM COLUMN B THE USAGE THAT
MATCHES THE MEASUREMENT TOOL IN COLUMN A.
RESPONSES ARE USED ONLY ONCE.
A. TOOL
B. USAGE
3-1.
3-2.
3-3.
3-4.
Parallel
1. To obtain an
Motion
azimuth of the Sun
Protractor
for checking gyro
(PMP)
compass error
Azimuth
2.
Circle
Bearing
Circle
3.
Telescopic
Alidade
4.
To obtain bearings
of aids to naviga-
tion to determine
the ship's position
To determine and
plot bearings and
courses on charts
To obtain bearings
of other ships to
determine relative
motion
3-5.
The azimuth circle can also be used
as a bearing circle.
1.
True
2.
False
3-6.
What is the advantage of plotting
with a PMP?
1.
It is anchored to the chart
table
2.
It allows the plotter to plot
quickly and accurately
3.
It allows the plotter to plot
fixes every 3 minutes
4.
It works in conjunction with
the compass rose
3-7.
What reference line should be used
to align a PMP to a chart?
1.
Latitude
2.
Longitude
3.
Meridian
3-9.
Why is it important to use a
telescopic alidade when taking
visual bearings?
1.
It gives bearings in true
degrees
2.
It fits on any compass
3.
It allows the bearing taker to
see both the object and its
bearing at the same time
4.
It can be used in any type of
weather
3-10.
What is the disadvantage of
determining gyro error by
terrestrial range?
1.
The ship has to be on the range
when the bearing is taken
2.
Most harbors don't use ranges
3.
This method is only as accurate
as the person taking the
bearing
3-11.
When is the Franklin technique of
checking gyro error most useful?
1.
In open ocean
2.
Prior to getting under way
3.
When a range cannot be found
4.
At any time
3-12.
When must you use the Franklin
technique of checking gyro error?
1.
The Sun is not visible
2.
A range cannot be found
3. An amplitude is not possible
4.
No other method of checking the
gyro error is available prior
to getting under way
3-13.
What publication name applies to a
complete listing of all aids to
navigation and chart symbology?
1.
Pilot Chart
2.
Chart #1
3.
Hydrographic Chart
4. Tide Tables
3-8.
When a telescopic alidade is used,
bearings should be read when the
circle is level.
1.
True
2.
False
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