Not in general:
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waters plural : the water occupying or flowing in a particular bed <the limpid waters of a mountain brook>
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territorial waters
the waters under the territorial jurisdiction of a nation or state
including both inland waters and marginal sea as measured from mean
low-water mark or from the seaward limit of a bay or river mouth
http://unabridged.merriam-webster.com
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Here:
traveling in waters - travelling at sea