Measuring SHW on a Spinnaker

[EdEssery]

I need to measure my spinnaker for a race entry form.

I know that SHW is measured at the the midway point of the luff and leech but I am unclear whether it is the full width of the spinnaker at this point or half the width.

If it's the full width, what's the difference between SHW and SMG?

Thanks,

Ed

 

[VicS]

SHW is defined as the distance between then half leech points

See http://www.rorcrating.com/ir2000/irc/define.htm and http://rorcrating.com/ir2000/irc/Measuring%20Rig%20&%20Sails.pdf

I think you may find that SMG is the same. I found this definition: Spinnaker Mid Girth (SMG) = mid girth length from midpoint of luff to midpoint of leech

Also found these two definitions:

SMW For symmetrical spinnakers only, maximum girth leech to leech. (Fold on
centerline, measure max. width, and multiply by two.)
SMG For asymmetrical spinnakers only, the mid-girth, found by measuring between
the mid-points of the luff and leech.