Why are hairline cracks in chainplates dangerous?
A chainplate is the single connection carrying the entire rig load into the hull; a hairline crack there grows under load and gives no warning at the moment of failure. Because the crack is invisible, dye penetrant testing is not optional.
Why it works this way
Leakage at the deck penetration both accelerates the crack and rots the backing beneath it, so the two are inspected together rather than as separate items.
Related services
Serkan Kotel · independent yacht surveyor · IIMS · ABYC · MCA
