OIC-NW MARINA REVIEWER / QUIZ COMPETENCE 1 - PART 5 - Seaman Kowts

COMPETENCE 1 – Plan and Conduct a Passage and Determine Position

Results

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#1. As the temperature of the air reaches the dew point:

rain must develop

fog may form

it begins to snow

water freezes

Incorrect!

#2. Right ascension is primarily used by the navigator for:

calculating amplitudes

calculating great circle sailings by the Ageton method

entering the Air Navigation Tables (Selected Stars) Pub 249

plotting on star finders

Incorrect!

#3. Pressure gradient is a measure of:

a high-pressure area

pressure difference over horizontal distance

pressure difference over time

vertical pressure variation

Incorrect!

#4. The difference between the DR position and a fix, both of which have the same time, is caused by:

variation

deviation

current

leeway

Incorrect!

#5. The appearance of nimbostratus clouds in the immediate vicinity of a ship at sea would be accompanied by which of the following conditions?

Rain and poor visibility

Dropping barometric pressure and backing wind in the Northern Hemisphere

High winds and rising sea

Severe thunderstorms

Incorrect!

#6. In which source could you find the number of a chart for a certain geographic area?

Chart No. 1

Catalog of Charts

American Practical Navigator

U.S. Coast Guard Light List

Incorrect!

#7. A line drawn through all points on a isomagnetic chart having the same amount of magnetic variation.

isotherms

agonic

isobaric

isogonic

Incorrect!

#8. Variation is not constant; it is different with every change in:

speed

vessel heading

geographical location

cargo

Incorrect!

#9. After the passage of a cold front the visibility:

does not change

improves rapidly

improves only slightly

becomes poor

Incorrect!

#10. Which of the following is NOT a form of precipitation?

rain

frost

sleet

snow

Incorrect!

#11. The magnitude of three stars is indicated. Which star is the brightest?

Antares + 1.2

Altair + 0.9

Vega + 0.1

Cannot be determined; magnitude indicates size not brightness

Incorrect!

#12. When navigating using GPS, what is an indicator of the geometry of the satellites that your receiver is locked onto?

Horizontal Dilution of Precision

Selective Availability

Doppler Shifting

Precision Coding

Incorrect!

#13. The region of high pressure extending around the Earth at about 35°N latitude is called the:

prevailing westerlies

horse latitudes

troposphere

doldrums

Incorrect!

#14. Cumulus clouds that have undergone vertical development and have become cumulonimbus in form, indicate:

clearing weather

that a warm front has passed

probable thunderstorm activity

an approaching hurricane or typhoon

Incorrect!

#15. The wind direction around a low pressure area in the Northern Hemisphere is:

clockwise and inward

clockwise and outward

counterclockwise and inward

counterclockwise and outward

Incorrect!

#16. The reaction of a gyrocompass to an applied force is known as:

precession

earth rate

gyroscopic inertia

gravity effect

Incorrect!

#17. In high latitudes, celestial observations can be made over a horizon covered with pack ice by bringing the sun tangent to the ice and:

adding 30° of arc to the sight

using a dip correction based on the height of eye above the ice

doubling the semidiameter correction

using a dip correction from table 22 in Bowditch Vol. II

Incorrect!

#18. On a Mercator chart, 1 nautical mile is equal to:

1 minute of longitude

1 degree of longitude

1 minute of latitude

1 degree of latitude

Incorrect!

#19. A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?

The motion of the apparent sun is along the ecliptic

Measurement of time is along the celestial equator

The speed of the Earth's revolution is not constant

There are variations in the Earth's rotational speed

Incorrect!

#20. The greater the pressure difference between a high and a low pressure center, the:

dryer the air mass will be

cooler the temperature will be

greater the force of the wind will be

warmer the temperature will be

Incorrect!

#21. Clouds with the prefix "nimbo" in their name:

are sheet or layer clouds

have undergone great vertical development

are middle or high altitude clouds

are rain clouds

Incorrect!

#22. The period at high or low tide during which there is no change in the height of the water is called the:

range of the tide

plane of the tide

stand of the tide

reversing of the tide

Incorrect!

#23. The Humboldt Current flows in which direction?

North

South

East

West

Incorrect!

#24. Magnets in the binnacles of magnetic compasses are used to reduce the effect of:

deviation

variation

local attraction

All of the above

Incorrect!

#25. In the relatively calm area near the hurricane center, the seas are:

moderate but easily navigated

calm

mountainous and confused

mountainous but fairly regular as far as direction is concerned

Incorrect!

#26. Which statement is TRUE concerning the current of the Gulf Stream?

It reaches its daily maximum speed a few hours before the transit of the Moon

It is slower at the time of neap tides than at spring tides

When the Moon is at its maximum declination the stream is narrower than when the Moon is on the

Variations in the trade winds affect the current

Incorrect!

#27. The constellation that contains Polaris is:

Orion

Cassiopeia

Ursa Minor

Corona Borealis

Incorrect!

#28. The edge of a hurricane has overtaken your vessel in the Gulf of Mexico, and the northwest wind of a few hours ago has shifted to the west. This is an indication that you are located in the:

navigable semicircle

dangerous semicircle

low pressure area

eye of the storm

Incorrect!

#29. The change in the length of day becomes greater as latitude increases because of the:

inclination of the diurnal circle to the equator

decreasing distance between the terrestrial meridians

increased obliquity of the celestial sphere

changing distance between the earth and the sun

Incorrect!

#30. The type of current which will have the greatest effect on the course made good for your vessel is:

one flowing in the same direction as your course steered

one flowing in the opposite direction as your course steered

one that flows at nearly right angles to your course steered

a rotary current in which the direction of current flow constantly changes

Incorrect!

#31. A generally circular low pressure area is called a(n):

cyclone

anticyclone

cold front

occluded front

Incorrect!

#32. Your vessel goes aground in soft mud. You would have the best chance of refloating it on the next tide if it grounded at:

low water neap

low water spring

high water neap

high water spring

Incorrect!

#33. Magnetic compass deviation:

varies depending upon the bearing used

is the angular difference between magnetic north and compass north

is published on the compass rose on most nautical charts

is the angular difference between geographic and magnetic meridians

Incorrect!

#34. What indicates that a tropical cyclone may be within 500 to 1,000 miles of your position?

A pumping of the barometer up and down a few millibars

A sudden wind shift from southwest to northwest followed by steadily increasing winds

The normal swell pattern becoming confused, with the length of the swell increasing

An overcast sky with steadily increasing rain from nimbostratus clouds

Incorrect!

#35. Which current is responsible for the movement of icebergs into the North Atlantic shipping lanes?

Iceland Current

Baltic Current

Labrador Current

Baffin Current

Incorrect!

Finish

There are 35 questions for the actual examination for Competence 1 for OIC-NW with a passing rate of 70%. This means that you are only allowed to make 10 mistakes.

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Results

#1. As the temperature of the air reaches the dew point:

#2. Right ascension is primarily used by the navigator for:

#3. Pressure gradient is a measure of:

#4. The difference between the DR position and a fix, both of which have the same time, is caused by:

#5. The appearance of nimbostratus clouds in the immediate vicinity of a ship at sea would be accompanied by which of the following conditions?

#6. In which source could you find the number of a chart for a certain geographic area?

#7. A line drawn through all points on a isomagnetic chart having the same amount of magnetic variation.

#8. Variation is not constant; it is different with every change in:

#9. After the passage of a cold front the visibility:

#10. Which of the following is NOT a form of precipitation?

#11. The magnitude of three stars is indicated. Which star is the brightest?

#12. When navigating using GPS, what is an indicator of the geometry of the satellites that your receiver is locked onto?

#13. The region of high pressure extending around the Earth at about 35°N latitude is called the:

#14. Cumulus clouds that have undergone vertical development and have become cumulonimbus in form, indicate:

#15. The wind direction around a low pressure area in the Northern Hemisphere is:

#16. The reaction of a gyrocompass to an applied force is known as:

#17. In high latitudes, celestial observations can be made over a horizon covered with pack ice by bringing the sun tangent to the ice and:

#18. On a Mercator chart, 1 nautical mile is equal to:

#19. A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?

#20. The greater the pressure difference between a high and a low pressure center, the:

#21. Clouds with the prefix "nimbo" in their name:

#22. The period at high or low tide during which there is no change in the height of the water is called the:

#23. The Humboldt Current flows in which direction?

#24. Magnets in the binnacles of magnetic compasses are used to reduce the effect of:

#25. In the relatively calm area near the hurricane center, the seas are:

#26. Which statement is TRUE concerning the current of the Gulf Stream?

#27. The constellation that contains Polaris is:

#28. The edge of a hurricane has overtaken your vessel in the Gulf of Mexico, and the northwest wind of a few hours ago has shifted to the west. This is an indication that you are located in the:

#29. The change in the length of day becomes greater as latitude increases because of the:

#30. The type of current which will have the greatest effect on the course made good for your vessel is:

#31. A generally circular low pressure area is called a(n):

#32. Your vessel goes aground in soft mud. You would have the best chance of refloating it on the next tide if it grounded at:

#33. Magnetic compass deviation:

#34. What indicates that a tropical cyclone may be within 500 to 1,000 miles of your position?

#35. Which current is responsible for the movement of icebergs into the North Atlantic shipping lanes?

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