514
14 CFR Ch. I (1–1–14 Edition)
Pt. 63, App. A
not be more than 5 percent of the inter-
vening time intervals, and the maximum
error of any one ETA shall not be more than
10 percent.
(19) Demonstrate knowledge and use of D/F
equipment and radio facility information.
Grading on this item will be based largely on
the applicant’s selection of those radio aids
which will be of most value to his naviga-
tion, the manner with which he uses equip-
ment, including filter box controls, and the
precision with which he reads bearings. The
aircraft’s compass heading and all compass
corrections must be considered for each bear-
ing.
(20) Use care in tuning to radio stations to
insure maximum reception of signal and
check for interference signals. Receiver will
be checked to ascertain that antenna and
BFO (Voice-CW) switches are in correct posi-
tions.
(21) Identify at least three radio stations
using International Morse code only for iden-
tification. The agent or examiner will tune
in these stations so that the applicant will
have no knowledge of the direction, distance,
or frequency of the stations.
(22) Take at least one radio bearing by
manual use of the loop. The agent or exam-
iner will check the applicant’s bearing by
taking a manual bearing on the same station
immediately after the applicant.
(23) Show the use of good judgment in eval-
uating radio bearings, and explain why cer-
tain bearings may be of doubtful value.
(24) Determine and apply correctly the cor-
rection required to be made to radio bearings
before plotting them on a Mercator chart,
and demonstrate the ability to plot bearings
accurately on charts of the Mercator and
Lambert conformal projections.
(25) Compute the compass heading, ETA,
and fuel remaining if it is assumed that the
flight would be diverted to an alternate air-
port at a time specified by the agent or ex-
aminer.
(26) Check the counter scales of a Loran re-
ceiver for accuracy, and explain the basic
(face) adjustments which affect tuning and
counter alignment. A guide sheet may be
used for this test.
(27) Demonstrate a knowledge of the basic
principle of Loran and the ability to tune a
Loran receiver, to match signals, to read
time differences, to plot Loran LOP’s, and to
identify and use sky waves.
(28) Take and plot bearings from a consol
station and explain the precautions which
must be taken when tuning a radio receiver
for consol signals. Also, discuss those condi-
tions which affect the reliability of consol
bearings.
(29) Demonstrate the ability to properly
operate and read an absolute altimeter.
(30) Determine the ‘‘D’’ factors for a series
of compared readings of an absolute altim-
eter and a pressure altimeter.
(31) Determine drift angle or lateral dis-
placement from the true headingline by ap-
plication of Bellamy’s formula or a variation
thereof.
(32) Interpret the altimeter comparison
data with respect to the pressure system
found at flight level. From this data evalu-
ate the accuracy of the prognostic weather
map used for flight planning and apply this
analysis to the navigation of the flight.
(33) Interpret single LOP’s for most prob-
able position, and show how a series of single
LOP’s of the same body may be used to indi-
cate the probable track and ground speed.
Also, show how a series of single LOP’s (ce-
lestial or radio) from the same celestial body
or radio station may be used to determine
position when the change of azimuth or bear-
ing is 30
°
or more between observations.
(34) Select one of the celestial LOP’s used
during the flight and explain how to make a
single line of position approach to a point se-
lected by the agent or examiner, giving head-
ings, times, and ETA’s.
(35) Demonstrate the proper use of an
astro-compass or periscopic sextant for tak-
ing bearings.
(36) Determine compass deviation as soon
as possible after reaching cruising altitude
and whenever there is a change of compass
heading of 15
°
or more.
(37) Take celestial fixes at hourly intervals
when conditions permit. The accuracy of
these fixes shall be checked by means of a
Loran, radio, or visual fix whenever prac-
ticable. After allowing for the probable error
of a Loran, radio, or visual fix, a celestial fix
under favorable conditions should plot with-
in 10 miles of the actual position.
(38) Select celestial bodies for observation,
when possible, whose azimuths will differ by
approximately 120
°
for a 3-body fix and will
differ by approximately 90
°
for a 2-body fix.
The altitudes of the selected bodies should be
between 25
°
and 75
°
whenever practicable.
(39) Have POMAR and any other required
reports ready for transmission at time of
schedule, and be able to inform the pilot in
command promptly with regard to the air-
craft’s position and progress in comparison
with the flight plan.
(40) Keep a log with sufficient legible en-
tries to provide a record from which the
flight could be retraced.
(41) Note significant weather changes
which might influence the drift or ground
speed of the aircraft, such as, temperature,
‘‘D’’ factors, frontal conditions, turbulence,
etc.
(42) Determine the wind between fixes as a
regular practice.
(43) Estimate the time required and aver-
age ground speed during a letdown, under
conditions specified by the pilot in com-
mand.
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