OUPV Practice test- Navigation
General Exam Prep 2025 Questions
and Answers
the term slackwater during a tidal change means - ✔✔little or no movement of water
when heading into a channel and the two range lights are in line line you should -
✔✔keep your course
you observe a buoy mark having a green and red horizontal bands. what light
characteristic will it have? - ✔✔composite group flashing
the direction of the earth's surface wind is - ✔✔deflected by the earths rotation
your vessel's position should be plotted using bearings of - ✔✔fixed known positions
on land
which buoys 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 nav. - ✔✔the buoy may not be in the
charted position
the "local notice to mariners" provides corrections of local nature to charts and is
published - ✔✔weekly
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 1
, the term "tide" means - ✔✔vertical movement of the water
when plotting a voyage - ✔✔never rely on a floating buoy to be on station as charted
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 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 a chart is the - ✔✔vertical distance from the chart sounding
datum to the ocean bottom
north hemisphere wind which shirts in a counter clockwise motion is called -
✔✔backing wind
a vessels position acquired by using atleast 3 or more bearings are called a - ✔✔fix
mean lower low water if the reference plane used for - ✔✔sounding on the US east and
west coasts
a single line of position combined with a DR position results in - ✔✔estimated position
the sun and moon align twice each month what type of tides can be expected -
✔✔spring
buoy marked with composite group flashing light indicates a - ✔✔preferred channel
on the US east and west coast charted depths are taken from - ✔✔lower low water
levels
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 2
General Exam Prep 2025 Questions
and Answers
the term slackwater during a tidal change means - ✔✔little or no movement of water
when heading into a channel and the two range lights are in line line you should -
✔✔keep your course
you observe a buoy mark having a green and red horizontal bands. what light
characteristic will it have? - ✔✔composite group flashing
the direction of the earth's surface wind is - ✔✔deflected by the earths rotation
your vessel's position should be plotted using bearings of - ✔✔fixed known positions
on land
which buoys 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 nav. - ✔✔the buoy may not be in the
charted position
the "local notice to mariners" provides corrections of local nature to charts and is
published - ✔✔weekly
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 1
, the term "tide" means - ✔✔vertical movement of the water
when plotting a voyage - ✔✔never rely on a floating buoy to be on station as charted
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 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 a chart is the - ✔✔vertical distance from the chart sounding
datum to the ocean bottom
north hemisphere wind which shirts in a counter clockwise motion is called -
✔✔backing wind
a vessels position acquired by using atleast 3 or more bearings are called a - ✔✔fix
mean lower low water if the reference plane used for - ✔✔sounding on the US east and
west coasts
a single line of position combined with a DR position results in - ✔✔estimated position
the sun and moon align twice each month what type of tides can be expected -
✔✔spring
buoy marked with composite group flashing light indicates a - ✔✔preferred channel
on the US east and west coast charted depths are taken from - ✔✔lower low water
levels
COPYRIGHT © 2025 BY OLIVIA WEST, ALL RIGHTS RESERVED 2
