How to practically construct a Deviation Card for the ship's magnetic compass??

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In this video, I explain the practical procedure of constructing a deviation card for the ship's magnet compass and the practical considerations to bore in mind while doing so.

Contents of this video will benefit mariners preparing for exams (written and oral examinations).
Mariners will also benefit by watching the following videos:
Magnetic anomalies:    • Magnetic anomalies of a ship's compas...  
Ship's magnetism:    • Ship's magnetism - Magnetic Compass  
Earth's magnetism:    • How does earth's magnetism influence ...  
Deviation of the magnetic compass:    • Deviation of the Magnetic Compass - S...  
Magnetism (an introduction):    • Magnetism - an introduction to the sh...  
Parts of a magnetic compass (Video):    • Parts of a magnetic compass - Video  

Gyro Compass (Part 1):    • Gyro Compass Part 1 - Introduction To...  
Gyro Compass (Part 2):    • Gyro Compass Part 2 - Properties of a...  
Gyro Compass (Part 3):    • Gyro compass Part 3 - Making a gyrosc...  
Gyro Compass (Part 4):    • Gyro Compass Part 4 - Fiber Optic Gyr...  
Gyro compass errors (Part 5):    • Gyro Compass Part 5: Errors & Limitat...  
Gyroscope (Axis of freedom and Precession) (Part 6):    • Gyro Compass Part 6 - Gyroscope axis ...  
Parts of a Gyro Compass (Part 7):    • Gyro Compass Part 7: Parts of Gyro Co...  
Rate of Turn Indicator (ROTI) (Part 8):    • Gyro Compass Part 8: Rate of Turn Ind...  
Top-heavy gyro compass (Part 9):    • Gyro Compass Part 9: What is a Top-he...  
Bottom-heavy gyro compass (Part 10):    • Gyro Compass Part 10: What is a Botto...  

Bridge Watchkeeping:
Contents of a GMDSS radio logbook:    • Contents of a GMDSS radio logbook  
Pilot card, wheelhouse poster and Manoeuvring booklet:    • Display of maneuvering information on...  
Avoidance of false distress alerts:    • Avoidance of false distress alerts - ...  
Ship reporting systems:    • Ship reporting system (SRS) - General...  
Ship routeing system:    • Ship’s Routeing System - Purpose and ...  
Master-pilot information exchange:    • Master - pilot information exchange -...  
Factors deciding the composition of engine room:    • Factors deciding the composition of a...  
Factors deciding the composition of a bridge watch:    • Factors to be taken into account when...  
Contents of a pilot card:    • Contents of a Pilot Card used on ship...  
IMO guidelines for piracy waters:    • IMO guidelines for ships entering pir...  
Decision support system:    • Decision support systems for Masters ...  
Use of ground tackle for beached vessel:    • The use of Ground Tackle when a vesse...  
Heaving to:    • What is the meaning of the term "Heav...  
Accidents using watertight doors:    • Accidents when using power-operated w...  
Master-Pilot relationship:    • Master - pilot relationship  
Gross tonnage and Net tonnage:    • Gross Tonnage and Net Tonnage - Defin...  
Elements of an effective master-pilot relationship:    • Elements of an effective master-pilot...  
Contents of master-pilot information exchange form:    • Contents of a master-pilot informatio...  

Chartwork:
How to use notices to mariners (Part 1):    • How to use Admiralty Notices to Marin...  
How to use notices to mariners (Part 2):    • How to use Admiralty Notices to Marin...  
How to use Notices to Mariners (Part 3):    • How to use Admiralty Notices to Marin...  
Using traverse tables:    • Using Traverse Tables for Coastal Nav...  
Mercator chart and sailings:    • Mercator Charts and Sailings - Coasta...  
Great circle sailing and gnomonic charts:    • Great Circle Sailing and Gnomonic Charts  
Passage plan with reference to tidal effects and current:    • Passage Plan with reference to tidal ...  
Raster and vector charts:    • Raster and Vector Charts - Advantages...  
Information on paper charts:    • Information on Paper Charts used on s...  
DR and fix position, effects of wind and current, set and drift:    • Chartwork on ships - DR and fix posit...  
Running Fix (Transferring position lines):    • Chartwork on ships - Running Fix (Tra...  
Tidal diamonds:    • Chartwork for deck officers - What ar...  
Finding the course to steer to counteract tidal currents:    • Chartwork for seafarers - Finding the...  
Basic terms, terminology, and symbols:    • Chartwork - Basic terms, terminology ...  
Allowing for the effect of wind and current on ship’s course and speed:    • Chartwork - Allowing for the leeway (...  
Counteracting for the effect of current and leeway to determine the course to steer:    • Chartwork - Determining the courses t...