The daily times of high and low water, and the monthly cycle of spring and neap tides were facts of observation that the seafarers of each particular port grew up with.
Amaxesha okuphakama nokuhla komthamo wamanzi, isekile yethayidi yasemva kwenyanga entsha egcweleyo kunye nethayidi yasemva kwekota yokuqala neyokugqibela yenyanga, zizinto ezazisoloko ziqwalaselwa ababesithi abasebenzisi lwandle bonxweme olo bakhule nazo.