It doesn't mean either of those things. It is saying that there is evidence that watercraft existed about 43,000 years ago in some other part of the world, not mentioned in your sentence, but found from the full text to be the area of Indonesia and Australia. Then there is a long gap during which no watercraft are known to have been used anywhere else, and the next evidence of use of watercraft comes from the Mediterranean about 13,000 years ago.
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