Eye witness report has the boat with genoa up and at least one adult on the foredeck immediatley before the incident. Center of effort forward, adult weight forward, no ballast and the bow will plow under.
This is a link to slideshow - http://www.nbcsandiego.com/news/local/Overturned-Sailboat-Kills-2-118786924.html
Note the cockpit packed with passengers in the first photo. Just one with a PFD and sitting on the leeward rail. Bow is riding very high. This is a picture of an accident waiting to happen and the wait time wasn't very long.
I'm sure that the investigation will show that the ballast tank was either empty or worse, partially empty. The ballast tank is flooded via a gate valve on the stern just below the waterline. If you forget to close the valve, the ballast tank will start to empty itself when the boat is under power. A partially filled ballast tank works against you by throwing what weight is available to one side in any kind of turn. If it is determined that the ballast tank was empty or the gate valve left open, then you will have the primary cause for the incident with overloading a major contributing factor.
It has been reported that the two fatalities "didn't know how to swim" and that leads me to believe that they didn't have PFD's on when they went into the water. The first picture doesn't have the majority of the passengers wearing one.
I had my Mac for 4 seasons, two of them while on Lake Michigan. The boat, when properly used, is virtually impossible to knock down. It tends to roundup almost immediately when overpowered. It's kinda tender, it doesn't point worth a damm but it's price point has brought many people into sailing, many of whom have moved on to traditional keel boats.
I don't think we can fault the boat for this incident. There were too many human errors involved and we still don't know the whole story yet.
This is a link to slideshow - http://www.nbcsandiego.com/news/local/Overturned-Sailboat-Kills-2-118786924.html
Note the cockpit packed with passengers in the first photo. Just one with a PFD and sitting on the leeward rail. Bow is riding very high. This is a picture of an accident waiting to happen and the wait time wasn't very long.
I'm sure that the investigation will show that the ballast tank was either empty or worse, partially empty. The ballast tank is flooded via a gate valve on the stern just below the waterline. If you forget to close the valve, the ballast tank will start to empty itself when the boat is under power. A partially filled ballast tank works against you by throwing what weight is available to one side in any kind of turn. If it is determined that the ballast tank was empty or the gate valve left open, then you will have the primary cause for the incident with overloading a major contributing factor.
It has been reported that the two fatalities "didn't know how to swim" and that leads me to believe that they didn't have PFD's on when they went into the water. The first picture doesn't have the majority of the passengers wearing one.
I had my Mac for 4 seasons, two of them while on Lake Michigan. The boat, when properly used, is virtually impossible to knock down. It tends to roundup almost immediately when overpowered. It's kinda tender, it doesn't point worth a damm but it's price point has brought many people into sailing, many of whom have moved on to traditional keel boats.
I don't think we can fault the boat for this incident. There were too many human errors involved and we still don't know the whole story yet.