Page 23 - Geography for Secondary Schools Student’s Book Form One
P. 23
Geography for Secondary Schools
Student’s Book Form One
(iv) Ship’s visibility
When watching an arriving ship from the coast, the visibility of the ship, which is far
away, starts with the flag, then the mast, and eventually the whole ship is seen as it
approaches the coast. When the ship moves away, it gradually disappears starting with
the ship, then the mast, and finally the flag. If the Earth was flat, the whole ship would
appear or disappear at once (Figure 2.7 a and b).
FOR ONLINE READING ONLY
Observer
Line of sight
Observer Line of sight
Figure 2.7 (a and b): Ship’s visibility on the spherical and flat Earth
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