'Flood-tide, moon north-east, south-west' meant that when the moon was new, high tide occurred 3 hours after she had passed the midnight line and the meridian.
"Ithayidi yesikhukula, umntla-mpuma wenyanga, umzantsi-ntshona, konke oku bekuthetha ukuba xa inyanga intsha, ithayidi ibinyuka emva kweyure ezintathu emveni kokuba igqithe umgca wenzulu busuku.