Answer: reefs

AnswerCrossword Clue
REEFS

Yachting hazards

REEFS

Coral groups

REEFS

Snorkeling destinations

REEFS
Coral masses
REEFS
Water hazards
REEFSSome endangered ecosystems
REEFSPerils for mariners
REEFSSome barriers to entry in the shipping business?
REEFSPrime snorkeling spots
REEFSUnderwater ecosystems
REEFSLocations for some schools
REEFSSome rocks, sometimes
REEFSRock ridges
REEFSBuoy locations
REEFSNavigational hazards
REEFSBoating hazards
REEFSSome protective barriers
REEFSScuba spots
REEFSLocales for many schools
REEFSSettings of many schools
REEFSSome are made of coral
REEFSShortens sails.
REEFSMarine hazards
REEFSShortens sails
REEFSSubmarine hazards
REEFSShortens sail
REEFSOffshore hazards
REEFSHazards for Columbus
REEFSSailing maneuvers
REEFSReduces a sail
REEFSHull scrapers
REEFSAtoll features
REEFSTrims sails
REEFSCorallic barriers
REEFSHelmsmen's hazards
REEFSHidden hazards offshore
REEFSKin of tombolos
REEFSCoral assemblies
REEFSShortens, as a sail
REEFSMarine dangers