RE ballast (Lead) not less. > > In general, Salinity is a variable, dependent upon several factors, mainly: > Depth of sea, Rock formations of sea-bed & coastline, average ambient > temperature (evaporation issues), where the sea is 'fed' from (freshwater > mountain rivers / streams, underground water table and what rocks the water > passes through, etc.) > > Salinity is not a constant, but can be