Blameless Postmortem

Action Items:

Lessons Learned

What went well

  • The correct recovery tasks were decided quickly and efficiently carried out.
  • All of the crew were wearing PFDs.
  • The boat was prepared with a backup motor.
  • We had several ways to communicate our distress including VHF and cell phones.

What went wrong

  • There are several pieces of the boat that are fault intolerant. The supporting structures of the mast (e.g. shrouds and stays) are such pieces. The shrouds on either side of the mast and the fore stay in front are single pieces, factory constructed, and rated. The back stay needs to be adjustable in order to affect the shape of the sails. This makes it much more prone to failure. It is common practice to attach a looser safety line from the deck to above the running rigging so that if that rigging failed the mast would not become completely and instantly unsupported. Prior to this race we had incorporated a defective soft shackle into the back stay but had never set a safety line.
  • We had not talked about the possibility of dismasting even though we knew that this race and location has notoriously high winds.

Where we got lucky

  • When supports to the mast fail under load, the mast will fall to leeward. It is natural for the crew — especially the foredeck crew nearest the mast — to be upwind of the mast for purposes of weight distribution. Nonetheless we are very lucky that no one was injured by the falling mast. We are all experienced sailors and have good instincts about where to position ourselves on the boat but it would have been much better if we had talked about a possible dismasting before the race and made our positions more explicit.
  • Our location in the race was very convenient. We were not near shore or any other obstruction and had plenty of time to collect our broken gear and install our emergency motor. Once we were under power the nearest dock with a boat launch was only a quarter mile away.

Timeline

  • 0800 we arrived at the Cascade Locks a day before the race.
  • 1400 install the mast and prepare the boat for a test sail.
  • 1430 the defective soft shackle is installed into the leeward deck attachment of the back stay. The reasoning is that because this race is almost exclusively downwind it would be to our advantage if we could elongate the back stay by six inches and orient the mast more upright. This is considered to be a faster configuration for high downwind sailing.
  • 1300 launch the boat and start our test sail. The winds are ~ 22 kts and are similar to conditions we anticipate during the race. We make several maneuvers on our test sail and everything appears to be functioning correctly.
  • 1600 dock the boat in the marina, put away the boat and retire until the next day.
  • 0700 arrive at the boat and set it up for racing.
  • 0730 Skippers meeting and check in with the race committee.
  • 0830 Leave dock and proceed to starting area. The conditions are very windy ~25 kts.
  • 0900 Race starts. The boat is handling well, although there are moments when the bow of the boat digs into the water. This produces a large bow wave and loads up the sails and the mast. This is a common occurrence in these conditions so we are not worried.
  • 1030 While the boat is bow down in a wave, a large gust of wind ~30 kts comes and produces a high load on the mast. The defective soft shackle fails and the mast breaks six feet above the deck and falls with the sails into the water.
  • 1050 We have recovered all the broken gear and have installed the emergency motor.
  • 1104 we arrive at the dock, secure the boat and call the race committee and our support crew to inform them of the accident.
  • 1400 We pull the boat out of the water and secure it to the trailer for its trip back to California.

Supporting Materials

Map and estimated route

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