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SECTION 1: THE
EARTH & THE CELESTIAL SPHERE
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•
Definition of the observerís zenith
and position of a heavenly body in terms of latitude,
longitude, GHA and declination.
•
Right angle relationships, latitude and co-lat, declination
and polar distance ñ Tabulation of declination
in the nautical almanac.
•
Relationship between GHA, longitude and LHA Tabulation
of GHA in the nautical almanac ñ Rate of Increase
of hour angle with time.
SECTION 2: THE PZX TRIANGLE
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•The tabulated components of the triangle, LHA,
co-lat and the polar distance.
• The calculable components, zenith distance and azimuth.
• Relationship between zenith distance and altitude
• Introduction to the tabular method of solution in the
Air Navigation Tables and the basic sight form.
• The use of calculators for the solution to the PZX triangle.
SECTION 3: THE
SEXTANT
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•Practical guide to the use and care of a sextant
at sea
• Conversion of sextant altitude to true altitude, application
of dip, index error, refraction, parallax and semi-diameter
• Correction of side error, perpendicularity, index error
and collimation error
SECTION 4: MEASUREMENT OF TIME
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•Definition of, and relationship between GMT,
LMT, standard time and zonetime.
• Rating of chronometers and watches.
SECTION 5: MERIDIAN
ALTITUDES
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• Forecasting of meridian altitude.
• Reduction of meridian altitude sights.
SECTION 6: SUN, STAR & OTHER SIGHTS
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• Reduction and plotting of sun sights using Air Navigation
tables
• Awareness of use of calculator fro sight reduction
• The plotting of a sun-run-meridian altitude
• Awareness of the reduction and plotting of sights obtained
from stars, moon and planets
SECTION 7: COMPASS
CHECKING
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• Use of amplitude and azimuth tables and/or a calculator.
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