If the polar is from FP, it must be at 20 kts true wind
. All of their polars that I've seen were that way.. And again, if it is from FP, they are theoritical ones and developed by computers
on ideal flat sea conditions and with partly loaded boat. (not the one fully loaded for blue water
I've sailed almost all of the FP range in various conditions as well as many monohulls; I haven't seen yet any boat w/out spinneaker that can reasonably sail on the AWA >130 max 140, particularly at low winds. (less than 10-12 kts of true)
If you are planning long passage
an expect to be mostly in 12-14 kts of true, twin geanoa is the way to go. I did with Orana
8+ kts to DDW, with 17-18 kts of true and you are likely to do even better with yr Lavezzi
, as they are lighter.
If you go for a screacher, a warning: standard ones that FP is suggesting are furling
, quite strong, but works beetween 60 to 130-140 degrees max. (AWA)
Some companies are making furlers (very expensive) that can furl a lighter screachers and cut with much larger roach, hence, they are good even at 160-170 degrees. (runners)
Nevertheless, they are very difficult to handle and either the furler
doesn't work when they need the most and or the screacher comes in 3-4 pieces ..
For easy sailing, I would recommend the first option and to gybe couple of times more, avoiding to go DDW in light airs. If the wind
is above 15-16 kts, you can move pretty well anyway with yr standard rig to almost any direction.