Assertion: diver's watch | /r/CapableOf | keep for about 64 to 77 degrees
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text: The “resistance to salt water” test requires that the watch be placed in a sodium chloride solution of 30 grams per liter, which is about the same as seawater, and kept there for 24 hours at 18 to 25 degrees C, or about 64 to 77 degrees F.