Rating & Handicapping

RATING & HANDICAPPING

Our handicapping fomula is the 1974 Off Soundings Club Rating Rule.

Rating in feet = [ { L + (2 * MSA * RA ) } /2.5 ] * PA
where L = PL +/- BC
PL = (LOA + LWL)/2
BC = 2*(LOA/4 - beam)
MSA= Measured sail area
PA = Propeller Allowance
RA = Rig Allowance

Propeller Allowance:
No prop 100%
One feather/fold 98%
Two feather/fold 97%
One 2-blade solid 96%
One 3-blade solid 94%
Two 3-blade solid 88%
One 4-blade solid 92%
Two 2-blade solid 90%
One 5-blade solid 90%

Rig Allowance (determined by mainsail rig):
Staysail 80%
Jib Headed 70%
Gaff 60%

Measurements:
Roughly speaking, these are measured:
P Main leech
B Main foot
H Luff (gaff main)
G Head (gaff main)
B1 Fore boom
P1 Fore boom to fore truck
P3 Fore boom to main truck
J Jib foot
LP Jib diagonal
P2 Deck to headstay
LOA Length on Deck

Measured sail area formulas:
Bermuda Main: PB/2
Gaff Main: [(B*H)+(G*D)]/2
where D = .96[(B*B)+(H*H)]
Area between masts (ABM)=.75*(P1+P3)/2*B1
Jib (no overlap): (P2*J)/2
Overlapping jib: 0.5(P2*J)+[ALH-0.5(P2*J)]+0.2J)]+0.2J(P2-2J
where ALH = [(P2*J)/2]*LP
Sail areas for main, ABM, and jib are totalled. Three or four masted vessels have multiple ABMs.

ADJUSTMENTS
If a vessel consistently performs well outside the range of her class (for instance, excessive displacement for her rated length), the Race Committee reserves the right to make appropriate adjustments in allowances or class placement until the vessel becomes competitive. If you question your rating please review the issue with the Race Committee.

PENALTIES
A penalty is applied to prior winners:
First in class: 10% penalty in following race. Second in class: 5% penalty in following race. If a schooner does not start in a given year, her penalty carries forward until she races again.

CLASSES
Classes are determined by rating before penalties are applied.

Class AA rates 50 feet or more.
Class A rates from 40 to less than 50 feet.
Class B rates from 30 to less than 40 feet.
Class C rates less than 30 feet.

We use the North American Yacht Racing Union Table of Allowances, which uses the nearest tenth of a foot rated length. An example:

Vessel A rates at 70 feet 81.82 seconds/mile
Vessel B rates at 80 feet 65.14 seconds/mile
Difference (margin) 16.68 seconds/mile
Distance in n.m. 127
Allowance (127 x 16.68) 2,118.36 seconds
Seconds to minutes (2118.36/60) 35.306 minutes
Decimal to seconds (.306*60) 18.36 seconds
Vessel B (longer) must beat Vessel A by more than 35 minutes 18.36 seconds to win on corrected time.

	RATING & HANDICAPPING Our handicapping fomula is the 1974 Off Soundings Club Rating Rule. Rating in feet = [ { L + (2 * MSA * RA ) } /2.5 ] * PA where L = PL +/- BC PL = (LOA + LWL)/2 BC = 2(LOA/4 - beam) MSA= Measured sail area PA = Propeller Allowance RA = Rig Allowance Propeller Allowance:* No prop 100% One feather/fold 98% Two feather/fold 97% One 2-blade solid 96% One 3-blade solid 94% Two 3-blade solid 88% One 4-blade solid 92% Two 2-blade solid 90% One 5-blade solid 90% Rig Allowance (determined by mainsail rig): Staysail 80% Jib Headed 70% Gaff 60% Measurements: Roughly speaking, these are measured: P Main leech B Main foot H Luff (gaff main) G Head (gaff main) B1 Fore boom P1 Fore boom to fore truck P3 Fore boom to main truck J Jib foot LP Jib diagonal P2 Deck to headstay LOA Length on Deck Measured sail area formulas: Bermuda Main: PB/2 Gaff Main: [(BH)+(GD)]/2 where D = .96[(BB)+(HH)] Area between masts (ABM)=.75(P1+P3)/2B1 Jib (no overlap): (P2J)/2 Overlapping jib: 0.5(P2J)+[ALH-0.5(P2J)]+0.2J)]+0.2J(P2-2J where ALH = [(P2J)/2]LP Sail areas for main, ABM, and jib are totalled. Three or four masted vessels have multiple ABMs. ADJUSTMENTS* If a vessel consistently performs well outside the range of her class (for instance, excessive displacement for her rated length), the Race Committee reserves the right to make appropriate adjustments in allowances or class placement until the vessel becomes competitive. If you question your rating please review the issue with the Race Committee. PENALTIES A penalty is applied to prior winners: First in class: 10% penalty in following race. Second in class: 5% penalty in following race. If a schooner does not start in a given year, her penalty carries forward until she races again. CLASSES Classes are determined by rating before penalties are applied. Class AA rates 50 feet or more. Class A rates from 40 to less than 50 feet. Class B rates from 30 to less than 40 feet. Class C rates less than 30 feet. COMPUTING CORRECTED TIME We use the North American Yacht Racing Union Table of Allowances, which uses the nearest tenth of a foot rated length. An example: Vessel A rates at 70 feet 81.82 seconds/mile Vessel B rates at 80 feet 65.14 seconds/mile Difference (margin) 16.68 seconds/mile Distance in n.m. 127 Allowance (127 x 16.68) 2,118.36 seconds Seconds to minutes (2118.36/60) 35.306 minutes Decimal to seconds (.306*60) 18.36 seconds Vessel B (longer) must beat Vessel A by more than 35 minutes 18.36 seconds to win on corrected time.