OUPV Navigation General Exam
Prep 2025 Questions and Answers
The term "slack water" during a tidal change means: - ✔✔Little or no movement of
water
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 line with the lower light you
should: - ✔✔Maintain your current course
You observe a buoy mark having green and red horizontal bands it will have a light
characteristic of: - ✔✔Composite group flashing (2+1)
The direction of the earth's surface wind is: - ✔✔Deflected by the earth's rotation
(coriolis effect)
Your vessel's position should be plotted using bearings of: - ✔✔Fixed known objects on
shore
Which buoy may be lettered and NOT numbered? - ✔✔Preferred-channel buoy
Spring tides will produce: - ✔✔Higher highs and lower lows than normal
You must assume when using a buoy as an aid to navigation: - ✔✔The buoy may not be
in the charted position
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 1
, The "Local Notice to Mariners" provides corrections of local nature to charts and is
published: - ✔✔Weekly
The term "Tide" means: - ✔✔Vertical movement of the water
When plotting a voyage, you should: - ✔✔Never rely on a floating buoy to maintain its
exact position
the difference in height between high tide and low tide: - ✔✔Range of tide
From seaward the IALA Region B red and green horizontally-banded buoys refer to: -
✔✔Preferred channels
Determining the heights of the land features on most charts unless otherwise stated the
"reference datum" is: - ✔✔Mean high water
Red or green lights may appear on: - ✔✔Horizontally banded buoys
The depth of the water on the chart is the: - ✔✔Vertical distance from the chart
sounding datum to the ocean bottom
A North Hemisphere wind which shifts in a counter clockwise motion is called a: -
✔✔Backing wind
A vessel's position acquired by using at least three or more bearings are called a: -
✔✔Fix
Mean lower low water (MLLW) is the reference plane used for: - ✔✔Sounding on the
U.S. east and west coasts
A single line of position combined with a dead-reckoning position results in a(n): -
✔✔Estimated position
The sun and moon align twice each month--what type of tides can be expected? -
✔✔Spring
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 2
Prep 2025 Questions and Answers
The term "slack water" during a tidal change means: - ✔✔Little or no movement of
water
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 line with the lower light you
should: - ✔✔Maintain your current course
You observe a buoy mark having green and red horizontal bands it will have a light
characteristic of: - ✔✔Composite group flashing (2+1)
The direction of the earth's surface wind is: - ✔✔Deflected by the earth's rotation
(coriolis effect)
Your vessel's position should be plotted using bearings of: - ✔✔Fixed known objects on
shore
Which buoy may be lettered and NOT numbered? - ✔✔Preferred-channel buoy
Spring tides will produce: - ✔✔Higher highs and lower lows than normal
You must assume when using a buoy as an aid to navigation: - ✔✔The buoy may not be
in the charted position
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 1
, The "Local Notice to Mariners" provides corrections of local nature to charts and is
published: - ✔✔Weekly
The term "Tide" means: - ✔✔Vertical movement of the water
When plotting a voyage, you should: - ✔✔Never rely on a floating buoy to maintain its
exact position
the difference in height between high tide and low tide: - ✔✔Range of tide
From seaward the IALA Region B red and green horizontally-banded buoys refer to: -
✔✔Preferred channels
Determining the heights of the land features on most charts unless otherwise stated the
"reference datum" is: - ✔✔Mean high water
Red or green lights may appear on: - ✔✔Horizontally banded buoys
The depth of the water on the chart is the: - ✔✔Vertical distance from the chart
sounding datum to the ocean bottom
A North Hemisphere wind which shifts in a counter clockwise motion is called a: -
✔✔Backing wind
A vessel's position acquired by using at least three or more bearings are called a: -
✔✔Fix
Mean lower low water (MLLW) is the reference plane used for: - ✔✔Sounding on the
U.S. east and west coasts
A single line of position combined with a dead-reckoning position results in a(n): -
✔✔Estimated position
The sun and moon align twice each month--what type of tides can be expected? -
✔✔Spring
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 2
