SEA SCHOOL OUPV NAVIGATION GENERAL QUESTIONS WELL ANSWERED
The term "Slack Water" during a tidal change means: - Answers Little or no movement.
When entering a channel from the sea and decide to check your compass heading, you steer on
a pair of range lights and find the upper light is in with the lower light, you should: - Answers
Maintain your current course.
You observe a buoy mark having green and red horizontal bands it will have a light characteristic
of: - Answers Composite group flashing (2+1)
The direction of the Earths surface wind is: - Answers Deflected by the earth's rotation (Coriolis
Effect)
Your vessel's position should be plotted using bearings of: - Answers Fixed known objects on
shore.
Which buoy may be lettered and NOT numbered? - Answers Preferred channel buoy
Spring tides will produce: - Answers Higher highs and lower lows than normal
You must assume when using a buoy as an aid to navigation: - Answers The buoy may not be in
the charted position.
The "Local Notice to Mariners" provide corrections of local nature to charts and is published: -
Answers Weekly
The term "Tide" means: - Answers vertical movement of water
When plotting a voyage, you should: - Answers Never rely on a floating buoy to maintain its
exact position
The difference in height between low and high tide is referred as the: - Answers Range of Tide
From seaward the IALA Region B red and green horizontally-banded buoys refer to: - Answers
Preferred channels
Determining the heights of the land features on most charts unless otherwise stated the
"reference datum" is: - Answers Mean High Water
Red and green lights may appear on: - Answers Horizontally banded buoys
The depth of the water on the chart is the: - Answers vertical distance from the chart sounding
datum to the ocean bottom
A North Hemisphere wind which shifts in a counterclockwise motion is called a - Answers
Backward wind
, A vessel's position acquired by using at least three or more bearings are called a: - Answers Fix
Mean lower low water (MLLW) is the reference plane used for: - Answers Sounding on the US
East and West coasts.
A single line if oisition combined with a dead-reckoning positions results in a - Answers
Estimated position
The sun and moon align twice a month - what type of tides can be expected? - Answers Spring
A buoy mark with a composite group-flashing light indicates - Answers Preferred channel
On the US east and west coasts charted depths are taken from - Answers Mean lower low water
A weather forecast expects a "backing" wind. In the Northern Hemisphere, this would indicate
that it will - Answers Shift in a counterclockwise manner.
What type of tides occur when the sun and moon are at right angles (90 degrees) to each other?
- Answers Neap
If lighted preferred-channel buoy will show a: - Answers Composite group-flashing (2+1) red or
green light
A weather forecast expects a "veering" wind. In the Northern Hemisphere, this would indicate
that it will - Answers Shift in a clockwise manner
The length of a lunar day is - Answers About 50 minutes longer than the solar day
A lighted preferred channel buoy may show a - Answers Composite group-flashing light
To determine the depth of the water, what should you apply to your depth finder reading? -
Answers Add the draft of the vessel.
A local wind which occurs especially during the day owing to the land heating up is a - Answers
Sea Breeze
A location that is acquired by using three or more intersecting lines of position taken at nearly
the same time is a - Answers FIX
Flashing green lights may appear on - Answers Horizontally banded buoys
Wind resulting from the cooling of a land mass more quickly especially at night than adjacent
water is a: - Answers Land Breeze
The term "Mean High Water" is the average height of - Answers All high waters over a 19 year
period.
Which term best describes "an accurate position which is NOT based on any prior position"? -
The term "Slack Water" during a tidal change means: - Answers Little or no movement.
When entering a channel from the sea and decide to check your compass heading, you steer on
a pair of range lights and find the upper light is in with the lower light, you should: - Answers
Maintain your current course.
You observe a buoy mark having green and red horizontal bands it will have a light characteristic
of: - Answers Composite group flashing (2+1)
The direction of the Earths surface wind is: - Answers Deflected by the earth's rotation (Coriolis
Effect)
Your vessel's position should be plotted using bearings of: - Answers Fixed known objects on
shore.
Which buoy may be lettered and NOT numbered? - Answers Preferred channel buoy
Spring tides will produce: - Answers Higher highs and lower lows than normal
You must assume when using a buoy as an aid to navigation: - Answers The buoy may not be in
the charted position.
The "Local Notice to Mariners" provide corrections of local nature to charts and is published: -
Answers Weekly
The term "Tide" means: - Answers vertical movement of water
When plotting a voyage, you should: - Answers Never rely on a floating buoy to maintain its
exact position
The difference in height between low and high tide is referred as the: - Answers Range of Tide
From seaward the IALA Region B red and green horizontally-banded buoys refer to: - Answers
Preferred channels
Determining the heights of the land features on most charts unless otherwise stated the
"reference datum" is: - Answers Mean High Water
Red and green lights may appear on: - Answers Horizontally banded buoys
The depth of the water on the chart is the: - Answers vertical distance from the chart sounding
datum to the ocean bottom
A North Hemisphere wind which shifts in a counterclockwise motion is called a - Answers
Backward wind
, A vessel's position acquired by using at least three or more bearings are called a: - Answers Fix
Mean lower low water (MLLW) is the reference plane used for: - Answers Sounding on the US
East and West coasts.
A single line if oisition combined with a dead-reckoning positions results in a - Answers
Estimated position
The sun and moon align twice a month - what type of tides can be expected? - Answers Spring
A buoy mark with a composite group-flashing light indicates - Answers Preferred channel
On the US east and west coasts charted depths are taken from - Answers Mean lower low water
A weather forecast expects a "backing" wind. In the Northern Hemisphere, this would indicate
that it will - Answers Shift in a counterclockwise manner.
What type of tides occur when the sun and moon are at right angles (90 degrees) to each other?
- Answers Neap
If lighted preferred-channel buoy will show a: - Answers Composite group-flashing (2+1) red or
green light
A weather forecast expects a "veering" wind. In the Northern Hemisphere, this would indicate
that it will - Answers Shift in a clockwise manner
The length of a lunar day is - Answers About 50 minutes longer than the solar day
A lighted preferred channel buoy may show a - Answers Composite group-flashing light
To determine the depth of the water, what should you apply to your depth finder reading? -
Answers Add the draft of the vessel.
A local wind which occurs especially during the day owing to the land heating up is a - Answers
Sea Breeze
A location that is acquired by using three or more intersecting lines of position taken at nearly
the same time is a - Answers FIX
Flashing green lights may appear on - Answers Horizontally banded buoys
Wind resulting from the cooling of a land mass more quickly especially at night than adjacent
water is a: - Answers Land Breeze
The term "Mean High Water" is the average height of - Answers All high waters over a 19 year
period.
Which term best describes "an accurate position which is NOT based on any prior position"? -
