The study of the ocean is almost as old as the history of mankind
itself. When the first seafarers set out in their primitive ships they
had to understand, as best they could, tides and currents, eddies and
vortices, for lack of understanding often led to loss of live. These
primitive oceanographers were, of course, primarily statisticians. They
collected what empirical data they could, and passed it down, ini-
tially by word of mouth, to their descendants. Data collection continued
throughout the millenia, and although data bases became larger, more re-
liable, and better codified, it was not really until surprisingly
recently that mankind began to try to understand the physics behind
these data, and, shortly afterwards, to attempt to model it. The basic
modelling tool of physical oceanography is, today, the partial
differential equation. Somehow, we all 'know" that if only we could find
the right set of equations, with the right initial and boundary
conditions, then we could solve the mysteries of ocean dynamics once and
for all.