Re: How can this happen? Shroud Tension
If the cotter pins were not in place then how do you know that the turnbuckle didn't turn and loosen?
Hopefully the cotter pins that hold the clevis pins were in place, it is really safe to sail without those being there.
boats that I sail on regularly: Pearson 28-2, Rondar 505, Yankee 30, Blanchard Junior