Answer: strs

AnswerCrossword Clue
STRSCellos, violas, etc.: Abbr.
STRSLarge boats: Abbr.
STRSSidewheelers: Abbr.
STRSViolins and viols: Abhr.
STRSPart of an orch.
STRSMus. group
STRSOrch. sections
STRSSome ships: Abbr.
STRSSights on the Atl.
STRSNavigation rtes.
STRSOcean vessels: Abbr.
STRSBrief banners
STRSBering and Taiwan (Abbr.)
STRSGibraltar and Hormuz: abbr.
STRSLiners: abbr.
STRSGibraltar and Magellan, briefly
STRSSome sea rtes.
STRSBering and Formosa: abbr.
STRSPhilharmonic sections: Abbr.
STRSViolins and violas (abbr.)
STRSNarrow waterways (abbr.)
STRSGibraltar and Magellan: Abbr.
STRSGibraltar et al.: Abbr.
STRSSlim bodies: Abbr.
STRSNarrow waterways: Abbr.
STRSViolas, cellos, etc.: Abbr.
STRSOrch. section
STRSOcean passages (abbr.)
STRSViolins, cellos, etc.
STRSViolins and violas: Abbr.
STRSShips: Abbr.
STRSVessels: Abbr.
STRSCertain ships: Abbr.
STRSWatercraft: Abbr.
STRSLiners: Abbr.
STRSOcean liners: Abbr.
STRSBoats: Abbr.