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How to read tidal patterns for fishing and navigation - Exam
Contributed by: Bryan
  • 1. What is a tide?
A) The rise and fall of sea levels caused by the gravitational forces of the Moon and Sun.
B) A sudden surge of water caused by earthquakes.
C) The average depth of the ocean.
D) Ocean currents created by wind.
  • 2. What primarily causes tides?
A) The Moon's gravitational pull.
B) The Sun's heat.
C) Wind patterns.
D) The Earth's rotation.
  • 3. What is a spring tide?
A) Tides with the smallest tidal range.
B) Tides that only occur in the spring season.
C) Tides with the largest tidal range, occurring during new and full moons.
D) Tides that occur during a solar eclipse.
  • 4. What is a neap tide?
A) Tides with the smallest tidal range, occurring during quarter moons.
B) Tides that have a very fast current.
C) Tides that occur during a lunar eclipse.
D) Tides that only occur in the autumn season.
  • 5. What moon phase causes spring tides?
A) Waxing gibbous.
B) New moon and full moon.
C) First quarter moon.
D) Third quarter moon.
  • 6. What moon phase causes neap tides?
A) First quarter moon and third quarter moon.
B) Waning crescent.
C) Full moon.
D) New moon.
  • 7. What is tidal range?
A) The vertical difference between high tide and low tide.
B) The distance a tide travels horizontally.
C) The speed of the tidal current.
D) The amount of time between high and low tide.
  • 8. What is a tidal current?
A) An underwater waterfall.
B) The horizontal movement of water caused by the rise and fall of tides.
C) A stream of fresh water flowing into the ocean.
D) The vertical movement of water during a tide.
  • 9. Flood tide refers to...
A) The outgoing tide.
B) A particularly strong tide.
C) The incoming tide.
D) A tide that overflows onto land.
  • 10. Ebb tide refers to...
A) The incoming tide.
B) The outgoing tide.
C) A particularly weak tide.
D) A tide that recedes very slowly.
  • 11. How do you typically find tide information?
A) Weather forecasts.
B) Almanacs.
C) Tide charts or tide tables.
D) Star charts.
  • 12. What do tide charts predict?
A) The speed of ocean currents.
B) The weather conditions at sea.
C) The times and heights of high and low tides.
D) The location of fish.
  • 13. Why are tide predictions important for navigation?
A) To predict the weather.
B) To determine the best fishing spots.
C) To find the safest route around icebergs.
D) To avoid running aground in shallow waters.
  • 14. How can tidal currents affect boat handling?
A) They can push a boat off course or make it difficult to maneuver.
B) They can automatically steer a boat.
C) They can help a boat travel faster.
D) They have no effect on boat handling.
  • 15. When are tidal currents typically strongest?
A) Around mid-tide, both flood and ebb.
B) At low tide.
C) At high tide.
D) During neap tides.
  • 16. What is a slack tide?
A) A tide that is late.
B) A tide that is very strong.
C) The period of little to no current between flood and ebb tides.
D) A tide that does not occur.
  • 17. Slack tide is advantageous for...
A) Docking and maneuvering in tight spaces.
B) Traveling at high speed.
C) Fishing in deep water.
D) Sailing against the current.
  • 18. How does wind affect tides?
A) Wind can pile up water on one side of a body of water, affecting local water levels.
B) Wind speeds up the tidal cycle.
C) Wind has no effect on tides.
D) Wind cancels out the effects of tides.
  • 19. How does barometric pressure affect tides?
A) Barometric pressure has no effect on tides.
B) Low pressure can cause higher tides, and high pressure can cause lower tides.
C) Barometric pressure changes the speed of the tide.
D) High pressure causes higher tides.
  • 20. What does it mean when a tide chart states 'MLLW'?
A) Mean Higher High Water.
B) Mean Lower Low Water.
C) Mean Low Water.
D) Maximum Low Water.
  • 21. Why is understanding tides important for fishing?
A) Tides have no impact on fishing.
B) Tides control the weather.
C) Tides only affect boat navigation.
D) Tides can influence fish behavior and location.
  • 22. During what part of the tidal cycle are fish often most active?
A) At high tide.
B) At low tide.
C) During the changing tides, especially flood tides.
D) During slack tide.
  • 23. How can tides affect access to fishing spots?
A) Tides only affect access to offshore fishing spots.
B) Tides create new fishing spots.
C) Tides never affect access to fishing spots.
D) Tides can expose or cover areas, affecting access to shore fishing or shallow water areas.
  • 24. What is a diurnal tide?
A) A tidal pattern with one high tide and one low tide per day.
B) A tidal pattern that changes every hour.
C) A tidal pattern with two high tides and two low tides per day.
D) A tidal pattern with irregular tides.
  • 25. What is a semi-diurnal tide?
A) A tidal pattern that only occurs twice a year.
B) A tidal pattern with irregular tides.
C) A tidal pattern with two high tides and two low tides per day.
D) A tidal pattern with one high tide and one low tide per day.
  • 26. What is a mixed tide?
A) A tidal pattern that only occurs during spring tides.
B) A tidal pattern with equal high and low tides.
C) A tidal pattern that changes every day.
D) A tidal pattern with two high tides and two low tides of unequal height each day.
  • 27. Why is it crucial to understand the local tidal patterns?
A) All tidal patterns are the same worldwide.
B) Tidal patterns vary significantly by location.
C) Tidal patterns are not important for navigation.
D) Tidal patterns only change with the seasons.
  • 28. What is the 'Rule of Twelfths' used for?
A) Calculating the speed of a tidal current.
B) Predicting the weather.
C) Determining the location of fish.
D) Estimating the approximate water level change during a tide.
  • 29. What does 'stand' refer to in the context of tides?
A) The time it takes for a tide to complete one cycle.
B) A period when the water level is nearly constant at high or low tide.
C) The lowest point of a low tide.
D) The highest point of a high tide.
  • 30. How do coastal features like inlets and bays affect tidal currents?
A) They have no effect on tidal currents.
B) They can amplify tidal currents due to constriction of water flow.
C) They slow down tidal currents.
D) They reverse the direction of tidal currents.
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