It is also a positive safety issue to be able to invert the boat.

If there is a capsize and one of the crew gets separated from his boat that is now doing 5 knots on its side, the crew should force the turtle to allow him to swim to the boat.

It may also be preferable to be on a turtled boat in an extreme weather event like hailstones or lightening, or if one of the crew is badly injured or needs picking up from a chopper.

Always look on the bright side hey?

Paul