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How to check the bulb attachment: things to verify during the survey of a sailing boat

A fundamental structural check for the safety of the sailing vessel

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Luca BosazziFebruary 27, 2026 · 2 min read
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How to check the bulb attachment: things to verify during the survey of a sailing boat
How to check the bulb attachment: things to verify during the survey of a sailing boat

Introduction

In the survey of a sailing boat, one of the most important structural checks concerns the attachment of the bulb to the keel. This is a crucial element for the safety of the vessel, which must be carefully examined before proceeding with the purchase. In the video "How to Check the BULB Attachment" Abayachting shows what to observe during the survey of a sailing boat.

What is the bulb and why is it so important

The bulb is the ballast located at the end of the keel of a sailing boat. Its function is to provide stability to the vessel, counteracting the force of the wind on the sails. The attachment of the bulb to the keel is therefore a delicate structural point: any issues in this area can compromise the safety of the entire sailing boat.

What to check in the bulb attachment during the survey

  • Presence of cracks or fissures: in the junction area between the bulb and the keel
  • Signs of leaks or corrosion: in the fastening bolts
  • Any abnormal movements or play: in the structure
  • Condition of the laminate and surfaces: in the attachment area

Why this check is crucial when purchasing a sailing boat

A compromised bulb attachment is one of the most serious defects a sailing vessel can have, both for safety and repair costs. Therefore, anyone looking to buy a used sailing boat must absolutely include this check in the survey of the vessel. Ignoring it means exposing oneself to significant risks.

The role of the surveyor in the structural check of the boat

Checking the bulb attachment requires specific technical expertise. Relying on a qualified marine surveyor, as advised by Abayachting, allows for the identification of any structural issues of the sailing vessel and for a proper assessment of the condition and value of the boat before purchase.

Conclusion

Checking the bulb attachment is an essential step in the survey of a used sailing boat. Watch the complete video from Abayachting to discover all the things to verify in this structural area of the vessel.

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