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.
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.
High tide nimo
When the tide is at its highest.
it is high tide
it is high tide
neap tide
The time for high tide and low tide depends on the date of the tide, and the place where you are measuring high and low tide. There isn't a fixed number, unfortunately.
there is a high tide nimo...
low tide in the night high tide in the day
High tide ...
2 high tides and 2 low tides in one day. All of them have different heights (Ex. One high high tide, then one high low tide, then a low high tide, then a low low tide.
2 high tides and 2 low tides in one day. All of them have different heights (Ex. One high high tide, then one high low tide, then a low high tide, then a low low tide.