Rig Measurement Definitions

All rig positions are relative to the base of the headstay. The longitudinal position of the headstay base is fixed at the FGS position. See Hull parameters on page 29.

Figure 1, Rig data parameters

Back to Entering Data

Foretriangle Definitions

I	Height from the sheerline to the top of the foretriangle.
J	Distance from the headstay base to the front of the mast.
LP	Jib clew to the luff taken perpendicular to the luff.
SPL	Spinnaker pole length
SL	Spinnaker luff length
SMW	Spinnaker maximum width

Also see:

Figure 1, Rig data parameters on page 30

Mainsail Definitions

P	Mainsail luff length from lower to upper band on the mast.
E	Mainsail foot length from the mast to the boom band.
PC/EC	The IOR "corrected" vales of P and C
MGU/MGM	The upper and middle girth dimensions of the mainsail.
BAS	Height of the lower mainsail luff band above the sheerline.

Also see:

Figure 1, Rig data parameters on page 30

Mast Definitions

MDT 1/MDL 1	Athwartships measurement and fore and aft dimension of the mast near the deck (Below any taper).
MDT 2/MDL 2	The same measurements as above taken at the upper mainsail band. If there is no mast taper, the upper and lower dimensions will match and the TL will be zero.
HBI	Freeboard at the base of the mast.
TL	Taper length of the mast

Also see:

Figure 1, Rig data parameters on page 30

Mizzen Definitions

EB	Distance between the aft side of the forward mast and the forward side of the aft mast
YSD	Aft luff of mizzen foresail
YSF	Bottom luff of mizzen foresail
YSMG	YSMG is mizzen foresail mid girth measured horizontally
PYC	Mizzen mainsail luff length from lower to upper band on the mast.
EYC	Mizzen mainsail foot length from the mast to the boom band.

All mizzenmast definitions (ending in “Y”) are identical to the main mast definitions.

Also see: Figure 1, Rig data parameters on page 30.