As the previous poster said, this is called a Solent Rig. I had one on a Saga 43. The foresail was a 135%
genoa that was used off of the
wind. If you ever had to tack it, you first rolled it up then unfurled it.
The inner sail was a flat cut 100% jib that on that boat was self tacking and was only used going to
weather. Both
sails were never used at the same time.
I think that this rig is great for cruisers. It has almost all of the benefits of a
cutter rig but with none of the drawbacks.
David