OUPV Navigation General | 2025/2026 Exam |
100 Questions | Buoyage, Tides, Charting,
Weather, Aids to Navigation
1. "Slack Water" During a tidal change means: Little or no movement of water
2. 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
3. You observe a buoy mark having Green and Red horizontal bands it will have a light
characteristic of: Composite group flashing (2+1)
4. The direction of the earth's surface wind is: Deflected by the earth's rotation (Coriolis Ettect)
5. Your vessel's position should be plotted using the bearing of: Fixed known objects on
shore
6. Which buoy may be lettered and NOT numbered: Preferred Channel Buoy
7. Spring tides will produce: Higher highs and lower lows
8. You must assume when using a buoy as an aid to navigation: The buoy may not be in the
charted position
mailto:https://www.stuvia.com/user/Wisdoms
, 9. The "Local Notice to Mariners" provides corrections of local nature to charts and
is published how often: Weekly
10. Term "Tide": Vertical movement of the water
11. When plotting a voyage, You should: Never rely on floating buoy to maintain its exact position
12. The difference of height between low and high tide is referred to as the: Range of
tide
13. From seaward the IALA Region B red and green horizontally banded buoys refer
to: Preferred Channels
14. determining the height of land features on most charts unless otherwise
stated the "Reference datum" is: Mean High water
15. Red or Green lights may appear on: Horizontally Banded Buoys
16. The depth of the water on a chart is the: Vertical distance from the chart sounding datum to the
ocean bottom
17. North Hemisphere wind which shifts in a counter clockwise motion is called-
: Backing wind
18. A vessel's position acquired by using at least three or more bearings are
called a: Fix
19. Mean lower low water (MILLW) is the reference plane used for: Sounding on the
U.S East and West coast
mailto:https://www.stuvia.com/user/Wisdoms
100 Questions | Buoyage, Tides, Charting,
Weather, Aids to Navigation
1. "Slack Water" During a tidal change means: Little or no movement of water
2. 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
3. You observe a buoy mark having Green and Red horizontal bands it will have a light
characteristic of: Composite group flashing (2+1)
4. The direction of the earth's surface wind is: Deflected by the earth's rotation (Coriolis Ettect)
5. Your vessel's position should be plotted using the bearing of: Fixed known objects on
shore
6. Which buoy may be lettered and NOT numbered: Preferred Channel Buoy
7. Spring tides will produce: Higher highs and lower lows
8. You must assume when using a buoy as an aid to navigation: The buoy may not be in the
charted position
mailto:https://www.stuvia.com/user/Wisdoms
, 9. The "Local Notice to Mariners" provides corrections of local nature to charts and
is published how often: Weekly
10. Term "Tide": Vertical movement of the water
11. When plotting a voyage, You should: Never rely on floating buoy to maintain its exact position
12. The difference of height between low and high tide is referred to as the: Range of
tide
13. From seaward the IALA Region B red and green horizontally banded buoys refer
to: Preferred Channels
14. determining the height of land features on most charts unless otherwise
stated the "Reference datum" is: Mean High water
15. Red or Green lights may appear on: Horizontally Banded Buoys
16. The depth of the water on a chart is the: Vertical distance from the chart sounding datum to the
ocean bottom
17. North Hemisphere wind which shifts in a counter clockwise motion is called-
: Backing wind
18. A vessel's position acquired by using at least three or more bearings are
called a: Fix
19. Mean lower low water (MILLW) is the reference plane used for: Sounding on the
U.S East and West coast
mailto:https://www.stuvia.com/user/Wisdoms
