On 23/3/20 5:43 pm, Richard Smith wrote:
(the Pacific has, in the main, just one tide per
day??).

No. Everywhere on earth, there are (almost) two tides per day, because
the high tides circulate (roughly following the moon) on *opposite*
sides of the globe.

It's like two dancers spinning around each other - both are flung
outwards away from the centre.

On average, the moon contributes about 1 metre of tidal flow, and the
sun about 0.5 metres. When these line up, you get 1.5m, and when they're
at right angles, you get 0.5m.

Up to here, all this can be calculated from the gravitational equation,
with knowledge of the orbits, masses and distances of the earth, moon
and sun.

Places with very high tides are like the slosh in the corner of a square
bucket - they're at "corners" of the oceans.

Clifford Heath.