Before you start
Gather the appropriate supplies and review the specific equipment manual.
- Rigging plan
- Flashlight
- Past inspection history
Step-by-step instructions
Locate chainplates and stays
Identify how the mast loads enter the deck or hull and what chainplate components are accessible without removing trim.
Look for surface clues
Photograph rust staining, leaks around deck penetrations, cracked sealant, deck movement or damaged fastening.
Consider hidden corrosion
Stainless steel can suffer crevice corrosion in oxygen-poor wet spaces even when the deck-level metal appears clean.
Review rigging age
Ask for records of removal, inspections, any prior leaks and replacement of chainplates or nearby fasteners.
Arrange qualified inspection
Use a professional rigger or surveyor for critical attachment evaluation and any dismantling of loaded rigging.
Safety note
Rig failure can cause dismasting. Do not loosen a chainplate, stay or structural fastener while it carries mast load.
Key takeaway
Visible staining is a clue, but internal corrosion can exist without obvious exterior damage.
Keep this job on your maintenance schedule
Save the topic as a maintenance task, choose a due date or engine-hour target, and record future service. Free and stored on your device.
Add to my maintenance plannerThis guide is for general education. Follow your equipment manufacturer’s instructions, current navigation guidance and applicable marine safety standards. When uncertain, use a qualified marine professional.