Volumes giving daily predictions of times of high and low waters at principal ports and positions in the world, together with data and instructions for obtaining times and height of high and low water at ports for which predictions are not given.
Imiqulu enika uqikelelo lwemihla ngemihla lwamaxesha amanzi aphezulu nasezantsi kumazibuko enqanawa angundoqo nakwizihlalo emhlabeni, kunye nolwazi kunye nemiqathango yokufumana amaxesha kunye nokuphakama kwamanzi aphezulu nasezantsi kumazibuko enqanawa apho uqikelelo lunganikwanga khona