Question 2004Navigation General70% to pass
A tide is called diurnal when _______________.
AI Explanation
The correct answer is A) only one high and one low water occur during a lunar day.
A diurnal tide is a type of tide where there is only one high tide and one low tide per lunar day (approximately 24 hours and 50 minutes). This is in contrast to a semi-diurnal tide, which has two high tides and two low tides per lunar day.
The other options are incorrect because: B) two high tides in a lunar day would describe a semi-diurnal tide, not a diurnal tide; C) the high and low tides being exactly six hours apart is a characteristic of a semi-diurnal tide, not a diurnal tide; and D) the high and low tides being higher/lower than usual is not part of the definition of a diurnal tide.
Related Questions
#2002 The average height of the surface of the sea for all stages of the tide over a 19 year period is called _______________.#2003 The diurnal inequality of the tides is caused by _______________.#2005 What is the definition of height of tide? #2006 The height of tide is the _______________.#2007 The vertical distance from the tidal datum to the level of the water is the _______________.