3-52.
What is the relationship, if any,
between wave amplitude and wave
height?
1.
Wave amplitude equals one-half
the wave height
2.
Wave amplitude equals the wave
height
3.
Wave amplitude is twice the
wave height
4.
None
3-53.
State the relationship between wave
frequency and wave period?
1.
Wave frequency is twice the
wave period
2.
The lower the wave frequency,
the longer the wave period
3.
Wave frequency equals one-half
the wave period
4.
The greater the wave frequency,
the longer the wave period
3-54.
If the mean period of a group of
waves is 1.5 see, what would be the
group wave speed?
1.
6 knots
2.
2 knots
3.
8 knots
4.
4 knots
3-55.
What is the significance of the
filter area in swell wave
forecasting?
1.
The filter area allows only
certain frequencies of swell
waves to arrive at the forecast
point
2.
The filter area has little
significance in swell wave
forecasting
3.
The filter area allows all
frequencies of swell waves to
arrive at the forecast point
4.
The filter area allows only
high frequency swell waves to
arrive at the forecast point
3-56.
What is the importance, if any, of
the significant frequency range?
1.
Low value frequencies with E-
values greater than 5% are
eliminated
2.
It determines the range of
periods at the forecast point
3.
High value frequencies with
E-values greater than 3% are
eliminated
4.
None
3-57.
When, if ever, does the energy
transfer from the wind to the sea
wave cease?
1.
When the speed of the sea wave
equals the speed of the wind
2.
When the speed of the sea wave
exceeds the speed of the wind
3.
When the speed of the sea wave
first exceeds one-half the wind
speed
4.
Never
3-58.
Which of the following statements
is NOT accurate regarding fully
developed seas?
1.
Generated wave frequencies
equal to or greater than the
minimum frequency for the wind
speed may be propagated
2.
The leeward portion of the
fetch area is in a steady state
3.
Sea waves can not be generated
at higher heights than the
maximum value for the wind
speed
4.
The windward portion of the
fetch is in a steady state
3-59.
What is the first step in preparing
a wave forecast?
1.
Determine the duration of the
winds
2.
Determine a representative wind
speed
3.
Determine a representative wind
direction
4.
Locate the fetch area
3-60.
Which of the following is the LEAST
accurate measure of wind speed over
a fetch area?
1.
Ship observations
2.
Reports from ships traveling
in opposing directions
3.
Uncorrected geostrophic winds
4.
Corrected geostrophic winds
3-61.
Which of the following statements
regarding curvature corrections is
accurate?
1.
Add a 10% correction to the
geostrophic wind for moderately
curved cyclonic curvature
2.
Straight isobars over shallow
basins require a 10% correction
3.
For isobars with sharp cyclonic
curvature, decrease the
geostrophic wind by 10%
4.
For isobars with sharply curved
anticyclonic curvature,
decrease the geostrophic wind
by 10%
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