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Fig. 1. Schematic drawing of the experimental pool. (A) Stationing hoop for the
test seal. (B) Shallow-water area in which the trail generator was stationed
before each trial. (C) Platform on which the trail generator awaited the end
of the trial after having generated the trail. The positions marked as
40° to 40° represent the end points of the nine courses of the
hydrodynamic trails.