C o m p a s s

C o m p a s s

Lesson 1 Information provided by ships compasses

Lesson 2 Causes and nature of magnetic compass error

Lesson 3 Limitations of the gyro compass

Lesson 4 Functions & components of steering systems

Lesson 5 Various forms of steering information

M a g n e t I s m

• First Law of Magnetism:

• Like Poles Repel

• Unlike Poles Attract

• The North Seeking Pole is the RED Pole

B I n n a c l e s

Magnetic Material Affecting Compasses

• Steel

»Ferrous

• Iron

• Electrical

V a r I a t I o n

Magnetic Field of a Magnet

Earth’s Magnetic Field

I n a c c u r a c I e s

• Near the magnetic poles• Near magnetic anomalies• Damage to binnacle• Damage to ship• Air bubbles touching compass card• Lubber line misaligned• Lightning strikes

Compass Bowl

B I n n a c l e