Bora, in the boat insurance glossary
Boat insurance term, area: Hull
The bora is the cold fall wind of the Adriatic. Air pools behind the coastal mountains of the Dinaric range and spills over the edge in gusts, often rising out of a calm morning within minutes and peaking far above the mean wind in the forecast. It is a classic reason why boats drag their anchor in bays open to the north east and chafe through mooring lines alongside. Two points in the wording decide what such a wind means for a hull claim: the force from which the conditions call weather a storm, often Beaufort 8, and any limit on lying unattended off an open coast.
What to check: From what wind force does your wording treat weather as a storm, and does the hull section also answer for stranding or collision below that force? And how long may the boat lie unattended off an open coast before cover falls away?
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A general explanation in our own words.
What applies to you is set only by the wording of your own policy.