07 - Basic Plotting

Question 1

Track

Answer 1

The intended horizontal direction of travel with respect to the earth

• Combinatino of intended course and speed

Question 2

Speed of Advance (SOA)

Answer 2

The intended speed to be made along your track

Question 3

Course Over Ground (COG)

Answer 3

Actual course of the vessel over the surface at a given value

Question 4

Speed Over Ground (SOG)

Answer 4

Actual speed of the vessel over the surface of the earth at a given value

Question 5

Current Triangle

Answer 5

Set - Direction of current

Drift - Speed of current

Question 6

Offsetting influences

Answer 6

Current ⇒ Resultant of all offsetting influences

• Tidal Current
• Winds
• Effects of the wind on the ship
• Heavy seas
• Inaccurate steering
• Error in engine calibration