6 hours between peaks
same
Twice a day. Same as high tides.
High tides, low tides, spring tides (which are maximum high tides) and neap tides (which are the lowest of low tides).
twice a day
There are nominally 2 high tides and 2 low tides in one day.
8 hours between high and low tide
8 hours between high and low tide
the times of high and low tide shift a little each day , so usually you'll get one high and one low
Fifteen thousand feet.
2 times
They consider high and low tides in their journey because if it is high tide the water level will be high but if it is low tides the water level is low.
Low tides