Pancyprian Compass & Instruments study plan
Pancyprian Compass & Instruments · Give each week a clear focus.
8 weeks · About 6 hours per week
Nautical instruments and their principles of operation
Explain, without notes, how each of the six classic navigational instruments works: magnetic compass, gyrocompass, log, echo sounder, sextant, and chronometer
Sketch a block diagram of a marine gyrocompass signal chain from sensitive element to repeater and label each stage
Define at least fifteen core instrument terms (precession, damping, follow-up, latitude error, speed error, and similar) in your own words
Describe the operating principle of a marine echo sounder, including transducer, pulse timing, and the effect of sound speed in water
Your checkpoint
A one-page labelled block diagram of a gyrocompass system plus a 15-term glossary written in your own words
Nautical instruments and their principles of operation & Magnetic and gyroscopic compasses
Compare magnetic and gyroscopic compasses on cost, power dependency, failure modes, and accuracy
Explain the Earth's magnetic field elements (declination, inclination, horizontal and vertical intensity) and how each affects a compass needle
Describe the construction and behaviour of a magnetic compass card, pivot, and liquid filling
Explain the gyroscopic properties of rigidity and precession and apply them to a spinning rotor under a tilting force
Your checkpoint
A comparison table of magnetic versus gyroscopic compasses covering at least eight criteria, each with a one-sentence justification
Magnetic and gyroscopic compasses
Trace how a free gyroscope becomes a north-seeking gyrocompass, naming the settling and damping actions
Explain the difference between a gyrocompass and a gyro repeater, and describe how repeater transmission works
List the principal errors of a gyrocompass (latitude, speed, course, ballistic) and state how each varies with ship conditions
Describe the checks a watchkeeper performs on a gyrocompass and its repeaters during a routine watch
Your checkpoint
A written explanation of at least 300 words describing how a free gyroscope settles to north, plus a list of four gyro errors with their causes
Compass errors, deviation and variation
Distinguish true, magnetic, and compass north and convert a bearing between the three using a worked example
Define variation and deviation and explain why variation depends on position while deviation depends on the ship's heading
Read a compass deviation table and extract the deviation for any given heading
Calculate deviation from observed compass and true bearings using a transit or azimuth method
Your checkpoint
Five fully worked bearing-conversion problems (true to compass and back) with all signs shown, plus a completed deviation table containing at least eight headings
Compass errors, deviation and variation & Compass adjustment and correction
Explain the magnetic effects of the ship's own structure, including hard and soft iron, and how each produces different deviation patterns
Describe the purpose and placement of corrector magnets and soft-iron spheres and Flinders bar
Outline the procedure for a compass swing, including when it is required and what conditions must be met
Explain why residual deviation remains after adjustment and how it is recorded and applied
Your checkpoint
A step-by-step swing procedure written as an ordered checklist, with a short note on what each corrector compensates for
Compass adjustment and correction
Describe how to construct and update a deviation table from swing observations
Explain the effect of changes in the ship's magnetic field on an existing deviation table and when a new swing is needed
Identify common faults in a magnetic compass (bubble, card sticking, pivot wear) and state the corrective action
Explain the adjustment checks and maintenance items for a gyrocompass installation
Your checkpoint
A fault-finding table listing at least six compass faults with symptom, probable cause, and corrective action
Compass construction, installation and care
Describe the siting requirements for a magnetic compass, including safe distances from magnetic material and electrical equipment
Explain the installation requirements and care of a gyrocompass and its repeaters, including alignment and power supply
List routine maintenance tasks and inspection intervals for compasses and related instruments
Explain how a compass is checked for alignment with the ship's fore-and-aft line
Your checkpoint
A maintenance schedule covering magnetic compass, gyrocompass, and repeaters, with task, interval, and who performs it
Related navigational instruments and their use & Compass errors, deviation and variation
Describe the principle and use of the log, echo sounder, and rate-of-turn indicator in navigation
Explain how instrument readings are corrected for known errors before being used in a position fix
Work through a mixed set of exam-style problems combining bearing conversion, deviation, and instrument error
Review your weakest domain from the earlier weeks and close the remaining gaps
Your checkpoint
A timed 20-question self-test covering all six domains, scored and reviewed, with a written list of remaining weak points
Milestones
Week 2: You can explain, unaided, how a gyrocompass finds north and why a magnetic compass points to magnetic rather than true north
Week 4: You convert any bearing between true, magnetic, and compass with correct signs, and read deviation from a table without error
Week 6: You can describe a full compass swing and name the corrector for each type of deviation-producing magnetism
Week 8: You score at least 70% on the timed mixed self-test and can name your two remaining weak areas with a plan to close them