Several countries had already
set up
coastal tide gauges — essentially, a float attached to a pen that traced a
line on a chart — and were calculating mean sea level, defined as the average of sea level measured at regular intervals between high and low tide.
Set and filmed in a western Irish
coastal town, the film has a most unusual first scene, including an acknowledgment of such as the priest (Gleeson) says «Certainly a startling opening
line ``.