We found 2 definitions of stms from 2 different sources.
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What does stms mean?
Sailor's Word-BookThe Sailor's Word-Book⛵
stms [from the Anglo-Saxon steorm]. Tempests, or gales of wind in nautic language, are of various kinds, and will be found under their respective designations. But that is a storm which reduces a ship to her storm staysails, or to her bare poles.
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