Tides

Question 1

New moon to 1st quarter

Answer 1

waxing crescent

Question 2

springs occur how many days after a full and new moon?

Answer 2

2 days

Question 3

full moon to last quarter

Answer 3

waning gibbous

Question 4

If we can see the moon and stars, is it likely to be high or low pressure?

Answer 4

high pressure

Question 5

what symbol is used in the almanac for a new moon?

Answer 5

black filled circle under the date and day of week

Question 6

last quarter to new moon

Answer 6

waning cresent

Question 7

What is the tide called when you are going from a high to low tide?

Answer 7

ebb tide

Question 8

What are Spring tides?

Answer 8

The highest high tides and lowest low tides.

Occurs twice in the orbits of the moon and earth when the moon is between the earth and the sun (new moon) and when the earth is between the moon and sun (full moon).

Question 9

On average, how many minutes later do tides get each day?

Answer 9

50 min

Question 10

Tidal Diamond table on chart

Answer 10

HW -6 thru HW +6
Set in degrees true
Spring tide
Neap tide

Question 11

If we have low pressure on the south coast of England, what kind of wind is likely and which direction will it come from?

Answer 11

Southwesterly wind

Question 12

What are Neap tides?

Answer 12

Lowest high tide and highest low tide.

Occur twice when the moon is at a right angle to the earth and sun. These are the lowest tides.

Question 13

If it’s overcast or raining, is it likely to be high or low pressure?

Answer 13

low pressure

Question 14

A waning moon has what shape?

Answer 14

Letter ‘C’

Question 15

What do you call a place that has two high tides during a 24 hour period?

Answer 15

Semi-diurnal

Question 16

How do you find the range of the tide?

Answer 16

Subtract the low tide from the high tide

Question 17

A waxing moon has what shape?

Answer 17

Letter ‘D’

Question 18

How to know which tidal curve to use

Answer 18

Determine range
HW - LW

Compare this to the Mean HW Springs and Neaps on the tidal curve to determine which you are closest to.

Question 19

Full moon to new moon

Answer 19

waning (reducing)

Question 20

What do you do if the tidal range is significantly larger or smaller than Springs/Neaps Mean?

Answer 20

Range calculated by you / MHWS or MHWN

and then multiply this by the tide you calculated using the tidal curve.

Question 21

Tidal Stream Atlas

Answer 21

Tidal set is indicated by arrows. You can use your chart plotter to figure out the degrees. Align plotter with the arrow closest to where you want.

1st two numbers are for Neaps

2nd 2 numbers are Spring rate

Question 22

what symbol is used in the almanac for a full moon?

Answer 22

unfilled circle under the date and day of week

Question 23

1st quarter to full moon

Answer 23

waxing gibbous

Question 24

What do you call a place that has only one high tide during a 24 hour period?

Answer 24

Diurnal

Question 25

How long is a lunar month?

Answer 25

29.5 days

Question 26

New moon to full moon

Answer 26

Waxing (growing)

Question 27

For Dayskipper exam, which tides will you have to calculate?

Answer 27

Springs, Neaps, or Midway between

Question 28

What is the tide called when you are going from a low to high tide?

Answer 28

flood tide

Question 29

If we have high pressure on the south coast of England, what kind of wind is likely and which direction will it come from?

Answer 29

Light northerly winds