4-44.
Which of the following statements
pertaining to bioluminescent
displays is accurate?
1.
Most sheet-type bioluminescent
displays are found in deep
basins
2.
Jellyfish may cause glowing-
ball displays
3.
Undulating waves of light are
categorized as sheet
bioluminescence
4.
Spark-type bioluminescence
primarily occurs in warmer
waters
4-45.
The Secchi Disc is used to obtain
which of the following information?
1.
A common measurement of water
transparency
2.
A common measurement of water
color
3.
A common measurement of
incident illumination
4.
A common measurement of
reflectivity
4-46.
Upwelling is normally found in the
western portions of major oceans.
1.
True
2.
False
4-47.
Which of the following statements
is NOT characteristic of
acoustic effects of fronts?
1.
The sonic layer depth (SLD) can
change by as much as 1,000 ft
in crossing a front
2.
Increased biological activity
generally found along a front
will increase ambient noise
3.
Towed array accuracies will
increase through the front
4.
The depth of the deep sound
channel may change by as much
as 2,500 ft in crossing a front
4-48.
Of the following systems, which is
a principal mine hunting sonar
system?
1.
AN/SQQ-32
2.
AN/SQQ-47
3.
AN/SQR-19
4.
AN/SQS-53
4-49.
Sustained winds of 35 knots or
greater define the minimum criteria
for which of the following
warnings?
4-50.
Of the following commands, which
would issue tropical warnings for
the western Pacific Ocean?
1 .
NAVPACMETOCCEN WEST GUAM
2.
NAVPACMETOCCEN PEARL HARBOR
3. NAVPACMETOCFAC YOKOSUKA
4.
NAVLANTMETOCCEN NORFOLK
4-51.
Which of the following statements
regarding the Atmospheric
Refractivity Profile Generator
(ARPGEN) product is NOT valid?
1.
The refractivity data set can
accommodate a maximum of five
data sets
2.
Levels above 10,000 m are
discarded
3.
Four types of historical
profiles may be created
4.
M-unit profiles are entered in
ascending order
4-52.
When using the M-unit profile entry
of the ARPGEN program, the
evaporative duct height is
determined by using which of the
following parameters?
1.
Air temperature, sea level
pressure, relative humidity,
and wind speed only
2.
Sea surface temperature,
dewpoint,
relative humidity,
and air temperature only
3.
Air temperature, relative
humidity,
wind speed, and sea
surface temperature only
4.
Air temperature and relative
humidity only
4-53.
Which of the following is an
accurate statement with regard to
altimeter settings?
1.
The altimeter is set to the
height of the cockpit
2.
The altimeter is set to the
station elevation
3.
The altimeter is set to 10 ft
above the deck
4.
Naval aircraft have self-
adjusting altimeters that do
not need manual adjustment
4-54.
Assume that an aircraft is flying
at 9,000 ft.
There is a 20-hPa
pressure differential between the
departure and arrival fields.
Approximately how many feet of
elevation change would this be?
1.
Wind warnings
2.
Storm warnings
3.
Gale warnings
4.
Small craft warnings
1.
100 ft
2.
300 ft
3.
600 ft
4.
900 ft
28
