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Course Name : Applied navigation (CUTM2340)

Course Name : Applied navigation (CUTM2340)


Capt. Sirish chandra Mishra


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Code(Credit) : cutm 2340(5-1-0)

Course Objectives

The main objectives of the course are to:

  • explain the role of time in celestial navigation
  • introduce the altitudes corrections
  • describe the use of the rising and setting of heavenly bodies in navigation
  • define the twilight and its use to navigation
  • give details about the latitude at noon and latitude by Polaris observations
  • exhibit the utilization of two or more position lines in position fixing
  • display the procedure of the recognition of heavenly bodies
  • elaborate on issues of oceanographic phenomena
  • analyze the navigation of life boats procedure and clarify the reception procedures of the notices to mariners

Learning Outcomes

After completion of the course students are expected to be able to:

  • consider time in their position fixing process
  • correct properly the sextant altitudes
  • observe the true rising and setting of heavenly bodies as a means of establishing the compass error
  • calculate the local times of morning and evening twilight
  • extract the latitude out of a body’s meridian passage or out of a Polaris observation
  • fix their position utilizing two or more position lines
  • define the sea’s level using data provided by the tide tables
  • safely navigate a life boat after abandoning the vessel
  • receive and immediately install the corrections provided by the notices to mariners
    They will be able to predict the appropriate advanced application for different classes of composites.

Course Sylabus

  • Time types, equation of time, solar and sidereal time
  • Altitude corrections
  • Rising and setting of heavenly bodies, twilights and relevant applications
  • Compass error at true rise or set
  • Compass error using time
  • Latitude at sun’s meridian passage
  • Polaris observations
  • Evaluating a celestial position line
  • Development of two or more celestial position lines
  • Identification of heavenly bodies
  • Tides, oceanographic phenomena
  • Notices to mariners management


Session Plan

Session 1

the mean apparent and sidereal time

Session 2

relationship between longitude and time

Session 3

International  date line, or calendar line, prime meridian.

Session 4Equation of time standard time

Session 4

principle behind sextant observations


Zone  time


Session 5

International date line, or calendar line, prime meridian.

Session 6

Relationship between longitude and time

Session 7Iinstruments barometer, use and correction to barometer readings

Session 8

Instrument , barometer, use and correction to barometer readings

Session 9

Equation of time


Session 10

Errors of sextant


Session 11

Index error: graduation error, Error of   perpendicularity, side error, index error off the arc and on the arc


Session 12

Correction to sextant

Session 13

Revision on equation of time


Rising and setting of heavenly body

Session 14

Use of nautical almanac


Corrections of altitude


session 16

correction of altitude


Session 16

Compass errors, variation, deviation

Session 17


Azimuth and amplitude

Session 18

Theoretical sun rise and sunset, twilights and

Session 19

Is use in navigation

Session  20

Use of nautical almanac, azimuth and amplitude

Session  21

Use of notices to mariners and different phases of moon

Session  22

Different types of twilights

Session  23

Zenith and nadir, different type of horizons

session 24

Different types of tide, ebb tide, flood tide.

Session 25

Range of tide.

Session 26

Relationship between phases of moon and tide.

Session 27

Neap tide and spring tide

Session 28

Lunisolar high water.


What is chart datum.

Session 30

Revision of different phases of moon.

Session 31

Revision on equinoxes.

Session 32

Inferior and superior planets

Session 33

Revision on equation of time when positive and when negative.


Equinoxial points

Session 35

Perigee and apogee

Session 36

Perihelion and Aphelion


Synodic month


Gibbous and crescent phases of moon..


Autumnal equinox

Session 40

Hunters moon


Liberation of the moon.

Session 42

Types of equinoxes.

session 43

umbra and penumbra

session 44

Ascending node and descending nodes


First point of Aries and first point of Libra

Session 46

What is called Prime vertical.

Session 47

Doubt clearing

Session 48

Revision of subject

Session 49

Revision of subject

Session 50

Revision of subject

Session 51

Revision of subject

Session 52

Doubt clearance

Session 53

Doubt clearance

Session 54

. Doubt clearance

Session 55

Doubt clearance