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.
to be sure that their journey is possible and free from any trouble.
Sometimes it might only be possible to leave or enter a harbour on a high tide because of the depth of the water. Also it might be harder for a ship to leave a harbour on an incoming tide because of currents.
High tides, low tides, spring tides (which are maximum high tides) and neap tides (which are the lowest of low tides).
There are 14 high tides.
High tides. The others are called low tides.
Fifteen thousand feet.
High tide nimo
it makes spring tides. the way i remenber that is springs go high and and spring tides are higher than neap tides.
high tides occurs when the river climbs and heavy rain falls
medium tides
spring tides.
Spring tides