RATING CERTIFICATE
(Valid only after approval and registration by the JCH commission)
Sail number : 1931

YACHT DESCRIPTION

Name of Yacht: ALTAIR
Request date : 02 01 2015
Launch year :1931
Designer : William Fife III OBE
Design year : 1929
Builder : Fife & Sons
Class name : Big Boat
Usual place of sailing : Mediterranean Sea

Declared dimensions :
Lenght Over All (LH) = 33.10 m
Length on the Water Line (LWL) = 24.18 m
Max width ( Bo ) = 6.24 m
Draft (Tmax) = 4.20 m
Displacement factor (FD) = 148.992


Correction factor calculation

Type of rigging : topsail schooner = 0.85
Hull: classic 1
C2 = -0.02 Kref = 0.185
C2a : -0.101
Regatta series : no = 0
Vintage bonus (build): 1931 = -0.019
Vintage bonus (design): 1929 = -0.021
Cumulative vintage bonus: -0.04
Hull material : traditional wood = -0.03
Mast material : wood/aluminium/steel = 0
Boom material : wood/aluminium/steel = 0
Mast or boom penality : 0
Material of mast or boom different from original : no = 0
Material other spar different from original : no = 0
Sails material : type 2 = 0
Propeller type : folding or feathering = -0.04
Winches ? : with = 0

Correction factor (C)= 0.619

GAFFERS
Foresail area: 209.17 mē
StaysailJL = 16.50 ; LPG = 8.00
JibJL = 16.85 ; LPG = 4.85
flying jibJL = 23.00 ; LPG = 8.13

Fisherman:
A = 8.40; B = 11.71; C = 17.06; D = 10.63; E = 10.66
Area: 97.43 mē
GAFFERS
Main total area: 301.56 mē
Gaffer Mainsail
A = 21.96, B = 10.50,
C = 12.75, D = 20.35, E = 15.86
With Mizzen or Jigger sail
A = 17.05, B = 7.40, C = 11.79, D = 13.94, E = 7.40
With Gaff topsail
F = 16.79, G = 12.42, H = 22.92

Larger downwindsail area:
SL / ALE = 23.80, SL / ALU = 28.70,
SMG / AMG = 17.30, SF / ASF = 19.30
Area: 387.19 mē

RATING ( Rc ): 14.275

Time corrected Factor ( Ftc ): 1.0972

The delivery of a JCH certificate does not have to be understood as the elligibility of the boat to classic regattas.
Elligibility to a specific regatta is governed by the elligibility rules the organizers has decided and have displayed in the Notice of Race.

IMPORTANT :
Handicap is calculated according to JCH calculation rules with your own measurements.
You are not allowed to use until it has been validated by a member of the JCH committee.