This video explains the concept of position lines and position circles; and how the intersection of these provide the ship's position at sea.
This video is useful for students learning about chartwork and coastal navigation.
The concept of "Running Fix" and transferring position lines is also discussed using animations.
The effect of wind and current (leeway and set) on a ship's course is also shown and discussed.
Previous videos on chartwork discussed the following:
Information on paper charts: https://www.youtube.com/watch?v=L4L6wihfaIc&t=8s
DR, set, leeway: https://www.youtube.com/watch?v=y22P1YOntjk&t=21s