Coast Guard VII Navigation

Question 1

Spring Tide vs Neap (and the two phases they are associated with) **weird only half moon has normal tides**

Answer 1

Spring: SPRING forward: when sun/moon lined up and get max high/low tides (semidiurnal and twice a month). NOTHING to to do with spring…more full and new moon Neap: weak, think 1st and 3rd quarter moon

Question 2

difference between high and low tide? distance surface water and tidal datum? The point where the tide stops rising or falling?

Answer 2

range height The Stand

Question 3

Veering wind Backing wind

Answer 3

Change direction clockwise Northern Hem Chang direction counterlclock in North

Question 4

how long one shot of anchor

Answer 4

15 fathoms (90 feet)

Question 5

what is height of tide?

Answer 5

diff depth of water and tidal datum

Question 5

what is a line that connects all points with same variation

Answer 5

isogonic line

Question 7

what is range of tide?

Answer 7

difference between high and low tide

Question 8

Which vessel must show forward and after masthead lights when making way? No need, regardless size

Answer 8

-Power vessel over 50m (2nd light is abaft and higher) NO need: towing, fishing, sailing, NUC

Question 9

Boat Lights angles (drawing)

Answer 9

Question 10

How to use Range Light

Answer 10

1. Concentrate on the lower range.
2. Lower range to the left? Steer left to get back onto the range-line.
3. Lower range to the right? Steer right to get back onto the range-line.