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