潜水表(Divers Watch)的标准规格。并在1984年做了部份的修订，使得潜水表除了在防水压力不同于防水表外，更附加了许多严苛的规定。
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Eager divers watch in wonder as these five to six metre creatures swim stealthily around the shoal in search of breakfast, their distinctive tails cutting silently through the water.
BBC: Swimming with sharks in the Philippines
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