Certificate
Units: EnglishHINT: Any heading in blue typeface can be clicked on to see a full definition of the term. (help)
Class:
J/27
Configuration:
One Design
Sail Number:
Year Built:
1999
Builder:
TILLOTSON-PEARSON
Owner(s):
Sailor, Jane
Certificate #:
EZ10504-OD
Valid Year:
2024
Type:
OD Template
Issue Date:
2023-11-25
Exp.Date:
2024-12-31
Offsets_file:
US18763.OFF
Cert Group:
ORR-Ez
Comment:
Rig Type:
Sloop
Forestay:
Fractional
Keel Type:
Fin
Prop Type:
None
Prop Install:
-
Prop Blades:
-
Prop Diameter:
0.00 ft
J/27 Template   J/27   
ORA Logo
ORR-Ez Logo
2024 ORR-Ez Certificate - EZ10504-OD
SpinnakerGPH: / IR#: / PHRF BM:
Non-SpinGPH: / IR#: / PHRF BM:
LOA:
8.41 ft
LWL:
7.01 ft
Rated Length:
7.66 ft
Beam Max:
2.60 ft
Draft:
1.51 ft
Draft Shoal:
1.51 ft
Disp Empty:
1,726 lbs
Disp Sailing:
2,229 lbs
Crew:
499 lbs
Water Ballast:
0 lbs
Wetted Area:
15.0 ft²
LPS:
110.7 °
RM20:
34.9 ft·lbs
Stab Index:
105 °
Rig Dimensions
IG:
9.14 ft
ISP:
9.14 ft
ILRH:
0.00 ft
J:
3.20 ft
JLRH:
0.00 ft
P:
10.06 ft
E:
3.81 ft
EY:
0.00 ft
PY:
0.00 ft
SPL:
3.20 ft
TPS:
0.00 ft
Mainsail Meas.
HB:
0.15 ft
MGT:
0.83 ft
MGU:
1.49 ft
MGM:
2.48 ft
MGL:
3.20 ft
Area:
23.6 ft²
Jib/Genoa Meas.
LP:
4.96 ft
LPG %:
155.0 %
J Luff:
9.20 ft
J Leech:
8.69 ft
JH:
0.00 ft
JMGT:
0.62 ft
JMGU:
1.24 ft
JMGM:
2.48 ft
JMGL:
3.72 ft
Area:
22.8 ft²
Asymmetric Spin. Meas.
ASLU:
0.00 ft
ASLE:
0.00 ft
AMG:
0.00 ft
ASF:
0.00 ft
Area:
0.0 ft²
Symmetric Spin. Meas.
SL:
9.21 ft
SMW:
5.76 ft
SF:
5.64 ft
Area:
44.0 ft²
Large Roach Headsail Meas.
HB:
0.00 ft
TW:
0.00 ft
UW:
0.00 ft
MW:
0.00 ft
LW:
0.00 ft
Foot:
0.00 ft
MG:
0.00 ft
LP:
0.00 ft
LUFF:
0.00 ft
Leech:
0.00 ft
Area:
0.0 ft²
Mizzen Meas.
HBY:
0.00 ft
MGTY:
0.00 ft
MGUY:
0.00 ft
MGMY:
0.00 ft
MGLY:
0.00 ft
Area:
0.0 ft²
Spinnaker:
Symmetrical flown with spinnaker pole
Genoa/Jib Leech:
No Roach - Leech is straight
Large Roach Headsail:
No
Jib Furler:
No
Main Roller Furling:
No
Benchmark Ratings
TOT (Spin)TOD (Spin)
GPH
IR#
Benchmark Ratings
TOT (Non-Spin)TOD (Non-Spin)
GPH
IR#
Non-Spinnaker
Spinnaker
PCS Ratings
4 kts6 kts8 kts10 kts12 kts16 kts20 kts24 kts
RANDOM LEG
W50/L50
W60/L40
MOSTLY WW
MOSTLY LW
MOSTLY REACH
PCS Ratings
4 kts6 kts8 kts10 kts12 kts16 kts20 kts24 kts
RANDOM LEG
W50/L50
W60/L40
MOSTLY WW
MOSTLY LW
MOSTLY REACH
Performance Metrics
SA/D Dnwind:
40.27
SA/D Average:
33.96
SA/D Upwind:
27.65
D/Length:
138.3
Ave Perf Screen:
24.6
DnWind Perf Screen:
29.1
Performance Metrics
SA/D:
27.65
D/Length:
138.3
Perf Screen:
20.0
J/27 Template   J/27   
ORA Logo
ORR-Ez Logo
2024 ORR-Ez Certificate - EZ10504-OD
There is no declared Spinnaker for this boat.
Polar Time Allowances
True Wind Speed4 kts6 kts8 kts10 kts12 kts16 kts20 kts24 ktsOpt Beat Angle45.844.743.340.037.936.135.736.2Beat VMG1,566.781,123.28911.16823.16780.40741.61728.49725.0352°975.16718.72602.64565.66547.35529.27520.10515.3960°874.81662.97576.01543.08526.75509.32499.61493.9475°804.02620.29552.02516.49499.87479.81466.88457.2190°796.16615.64549.59511.76483.51456.29438.56423.41110°876.00666.14581.38540.68509.68454.22408.45385.72120°1,020.29744.68617.00566.75532.06477.11420.49374.73135°1,361.42942.06734.41625.34571.96505.38451.17390.19150°1,685.551,122.89841.55696.77608.80525.60469.85414.70165°1,780.151,194.86902.30738.42633.36534.74474.95419.02Run VMG1,813.781,216.22917.48749.81642.34541.26481.35425.75Opt Run Angle171.8171.9172.0172.1172.3173.3172.8171.4
Polar Time Allowances
True Wind Speed4 kts6 kts8 kts10 kts12 kts16 kts20 kts24 ktsOpt Beat Angle45.844.743.340.037.936.135.736.2Beat VMG1,566.781,123.28911.16823.16780.40741.61728.49725.0352°975.16718.72602.64565.66547.35529.27520.10515.3960°874.81662.97576.01543.08526.75509.32499.61493.8075°804.02620.29552.02516.49499.87474.36458.12446.5290°799.89610.48535.39496.70474.80442.96421.17403.59110°798.47613.48542.88502.31467.65411.41376.02352.62120°842.01642.39563.10522.45489.70422.30357.54329.38135°1,128.31789.85629.52567.24527.94465.64398.48324.17150°1,381.89966.40762.14633.41570.39498.98440.93376.07165°1,541.301,077.88850.06705.18614.52525.89468.46412.10Run VMG1,595.671,115.90880.04730.06636.20539.65480.82425.75Opt Run Angle133.4136.3140.1152.7165.5173.3172.8171.4
Legacy 4 Winds
TOT (Spin)TOD (Spin)
V.LightLightMediumHeavyV.LightLightMediumHeavy
RANDOM LEG
W50/L50
W60/L40
MOSTLY WW
MOSTLY LW
MOSTLY REACH
Legacy 4 Winds
TOT (Non-Spin)TOD (Non-Spin)
V.LightLightMediumHeavyV.LightLightMediumHeavy
RANDOM LEG
W50/L50
W60/L40
MOSTLY WW
MOSTLY LW
MOSTLY REACH
Non-Spinnaker
Spinnaker
Standard 5 Winds
TOT (Spin)TOD (Spin)
V.Light
<5
Light
5-7
Lt/Med
7-9
Medium
9-15
Heavy
>15
V.Light
<5
Light
5-7
Lt/Med
7-9
Medium
9-15
Heavy
>15
RANDOM LEG
W50/L50
W60/L40
MOSTLY WW
MOSTLY LW
MOSTLY REACH
Standard 5 Winds
TOT (Non-Spin)TOD (Non-Spin)
V.Light
<5
Light
5-7
Lt/Med
7-9
Medium
9-15
Heavy
>15
V.Light
<5
Light
5-7
Lt/Med
7-9
Medium
9-15
Heavy
>15
RANDOM LEG
W50/L50
W60/L40
MOSTLY WW
MOSTLY LW
MOSTLY REACH
Standard Single Wind
TOT (Spin)TOD (Spin)
SingleSingle
RANDOM LEG
W50/L50
W60/L40
MOSTLY WW
MOSTLY LW
MOSTLY REACH
Standard Single Wind
TOT (Non-Spin)TOD (Non-Spin)
SingleSingle
RANDOM LEG
W50/L50
W60/L40
MOSTLY WW
MOSTLY LW
MOSTLY REACH
J/27 Template   J/27   
ORA Logo
ORR-Ez Logo
2024 ORR-Ez Certificate - EZ10504-OD
There is no declared Spinnaker for this boat.
Non-Spinnaker
PHRF 5 Winds
V.Light
<5
Light
5-7
Lt/Med
7-9
Medium
9-15
Heavy
>15
RANDOM LEG
W50/L50
W60/L40
MOSTLY WW
MOSTLY LW
MOSTLY REACH
PHRF 5 Winds
V.Light
<5
Light
5-7
Lt/Med
7-9
Medium
9-15
Heavy
>15
RANDOM LEG
W50/L50
W60/L40
MOSTLY WW
MOSTLY LW
MOSTLY REACH
Spinnaker
PHRF Benchmark
Aligned Ratings are based on the Farr 40 MH as Scratch Boat.
PHRF Benchmark
Aligned Ratings are based on the Farr 40 MH as Scratch Boat.
PHRF Single Wind
RANDOM LEG
W50/L50
W60/L40
MOSTLY WW
MOSTLY LW
MOSTLY REACH
PHRF Single Wind
RANDOM LEG
W50/L50
W60/L40
MOSTLY WW
MOSTLY LW
MOSTLY REACH
J/27 Template   J/27   
ORA Logo
ORR-Ez Logo
2024 ORR-Ez Certificate - EZ10504-OD
There is no declared Spinnaker for this boat.
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Label Definition Values
AUTORUN STATUStext
BDYlength
CERTIFICATE #text
EBlength
HBThe width of the Mainsail Headboard.length
HBYThe width of the Mizzen headboard.length
IGThe height of highest Genoa/Jib termination point above the sheer line.length
LOAThe overall length of the boat including the whole hull. Do not include spars or projections fixed to the hull such as chainplates, bowsprits, boomkins, pulpits, etc..length
LPThe shortest distance from the clew of the Jib to the luff.length
HBThe width of the Large Roach Headsail head or headboard.length
SLThe longest length of a Symmetric Spinnaker luff and leech measured along the edges of the sail from head to foot.length
LWLThe length of the hull at the waterline.length
RATED LENGTHThe Rated Length of a boat is the effective sailing length used to predict boat speeds and ratings. This is calculated in the sailing conditions which includes crew, gear and sails. It includes the effects of bow and stern overhangs.length
ANCHOR DISTlength
BEAM MAXThe maximum width (beam) of the boat measured at deck level at the widest point between the port and starboard sides.length
CONFIGURATIONConfiguration describes the boats configuration in relationship to other prior certificates. It can be left blank if a boat has only one certificate. It has a maximum of 20 characters.text
SA/D DNWINDA sailboat metric for express a Power to Drag ratio. Downwind SA/D = Downwind Sail Area/(displacement)^.667number
ISPThe height of highest spinnaker termination point above the shear line.length
LPG %The width (LP) of the headsail expressed as a percentage of the J measurement.percentage
TWThe shortest distance from the seven-eighths-leech point of the Large Roach Headsail to the luff.length
MGTThe shortest distance from the seven-eighths-leech point of the Mainsail to the luff.length
MGTYThe shortest distance from the seven-eighths-leech point of the Mizzen to the luff.length
MWlength
SMWThe Symmetrical Spinnaker measurement between the midpoints of the luff and leech.length
ILRHThe height of Large Roach Headsail termination point above the sheer line.length
SA/D AVERAGEnumber
BASYlength
DRAFTThe maximun depth of the boat (keel) below the waterline.length
JThe distance between the front of the mast and the headstay termination on the deck at the sheer line.length
JLRHThe distance between the front of the mast and the Large Roach Headsail tack point at the sheer line.length
J LUFFThe length of the luff shall normally be the distance between the lowest part of the sail of the luff at the tack and the highest point of the sail on the luff at the head.length
UWThe shortest distance from the three-quarter-leech point of the Large Roach Headsail to the luff.length
MGUThe shortest distance from the three-quarter-leech point of the Mainsail to the luff. length
MGUYThe shortest distance from the three-quarter-leech point of the Mizzen to the luff.length
SFThe Symmetrical Spinnaker distance between the tack and clew, measured by the shortest path.length
SA/D UPWINDnumber
SA/Dnumber
VALID YEARtext
J LEECHlength
ISSUE DATEtext
EXP.DATEtext
AREAThe total area (square feet/meters) of the largest Symmetrical Spinnaker.area
BASBoom Above Sheerlength
DRAFT SHOALThe shallowest Draft possible during sailing.length
JHlength
MWThe shortest distance from the half-leech point of the Large Roach Headsail to the luff.length
MGMThe shortest distance from the half-leech point of the Mainsail to the luff.length
MGMYThe shortest distance from the half-leech point of the Mizzen to the luff.length
PThe distance between colored bands on the mast, or the maximum luff length of the Mainsail.length
RIG TYPEThe type (style) of rig the boat uses.● Sloop,
● Ketch,
● Yawl,
● Cat Ketch,
● Gaff,
● Cat,
● Cutter,
● Schooner,
● Other,
D/LENGTHBoat Metric for comparing designs and Speed. DLR = Displacement/(LWL)^3text
D/LENGTHBoat Metric for comparing designs and Speed. DLR = Displacement/(LWL)^3text
DISP EMPTYThe dry weight of the boat with all loose equipment removed. This is undoubtedly the most frequent question by owners since in almost all cased the "Measured Displacement" used for ORR-Ez ratings is greater than the "Brochure Displacement" used for publications and posted on Sailboatdata.com ORR-Ez uses the median of the boats that have been measured for ORR,ORC,IRC, Americap, IMSweight
EThe distance between the colored bands on the boom, or the maximum foot length of the Mainsail.length
JMGTlength
LWThe shortest distance from the quarter-leech point of the Large Roach Headsail to the luff.length
FORESTAYChoose Masthead if the headstay terminates at the top of the mast. Choose Fractional if the headstay terminates anywhere below the top of the mast.● Masthead,
● Fractional,
MGLThe shortest distance from the quarter-leech point of the Mainsail to the luff.length
MGLYThe shortest distance from the quarter-leech point of the Mizzen to the luff.length
OFFSETS_FILEtext
DISP SAILINGThe calculated displacement of the boat in sailing configuration, including equipment and crew.weight
CREWThe aggregate weight of the crew in lightweight clothing used in the calculations of ratings. This is the Maximum Crew Weight and any excess shall automatically suspend the validity of the Certificate.weight
WATER BALLASTweight
AREAThe total area (square feet/meters) of the largest Mainsail.area
AREAThe total area (square feet/meters) of the Mizzen.area
ASLUThe Asymmetrical spinnaker luff length.length
EYThe distance between colored bands on the boom, or the maximum foot length of the Mizzen.length
JMGUlength
FOOTThe length of the foot of the Large Roach Headsail.length
MGThe measurement between the midpoints of the Large Roach Headsail luff and leech.length
ASLEThe Asymmetrical Spinnaker leech length.length
AVE PERF SCREENAverage perf screen is a metric that is used by some OA's for establishing fleet splits that are based on the 'Sportiness' of a boat. Mathematically it is Average Sail Area Displacement Ratio / Displacement Length Ratio * 100 to make it readable.number
PERF SCREENAverage perf screen is a metric that is used by some OA's for establishing fleet splits that are based on the 'Sportiness' of a boat. Mathematically it is Average Sail Area Displacement Ratio / Displacement Length Ratio * 100 to make it readable.number
COMMENTtext
JMGMlength
KEEL TYPEThe type (style) of keel on the boat.● Fixed w/ Winglets,
● Fixed,
● Canting,
● Fin,
● Centerboard,
● Keel Centerboard,
● Fin with Bulb,
● Wing,
● Other,
LPThe shortest distance from the clew of the Large Roach Headsail to the luff.length
PYThe distance between colored bands on the mizzen mast, or the maximum luff length of the Mizzen.length
AMGThe measurement between the midpoints of the Asymmetrical Spinnaker luff and leech.length
DNWIND PERF SCREENDownWind perf screen is a metric that is used by some OA's for establishing fleet splits that are based on the 'Sportiness' of a boat. Mathematically it is Average Sail Area Displacement Ratio / Displacement Length Ratio * 100 to make it readable.number
JMGLlength
LUFFThe length of the luff shall normally be the distance between the lowest part of the sail of the luff at the tack and the highest point of the sail on the luff at the head.length
PROP TYPEThe type (style) of propeller the boat uses; or to indicate the use of an Outboard motor.● Fixed,
● Folding,
● Feathering,
● Outboard,
● None,
SPLThe length of the spinnaker pole (or whisker pole), when it is attached on the mast, and set in a horizontal position fore and aft, measured from the forward face of the mast to the forward most point of the pole and fittings.length
WETTED AREAarea
ASFThe Asymmetrical Spinnaker foot length.length
LPSdegree
LEECHThe length of the leech of the Large Roach Headsail.length
PROP INSTALLThe type (style) and placement of mounting for the propeller. Note that Strut Drive is the proper choice for Sail Drives.● Exposed,
● In Aperture,
● Strut Drive,
● Other,
● Exposed Other,
● Exposed Twin,
● Housed Shaft,
● Pre 1987,
● Old Strut,
● Exp No Strut,
● No Prop,
TPSThe tack point of an asymmetric spinnaker (mounted on the centerline of the boat, to the deck or to a sprit) measured from the front of the mast to the tack point of the sail, perpendicular to the water.length
AREAThe total area (square feet/meters) of the largest Asymmetrical Spinnaker.area
PROP BLADESThe number of blades the propeller uses.● 2,
● 3,
● 4,
RM20force
MDL1Ylength
STAB INDEXdegree
AREAThe total area (square feet/meters) of the largest Headsail (Jib or Genoa).area
AREAThe total area (square feet/meters) of the largest Large Roach Headsail.area
SPINNAKERThe type of spinnaker(s) this boat flies. Include all types.● None,
● Asymmetrical tacked centerline on bow, sprit or prod,
● Asymmetrical only flown with spinnaker pole,
● Symmetrical flown with spinnaker pole,
● Both Symmetrical & Asymmetrical flown with spin pole,
BOW SHEER Xnumber
CODE ZEROAnswer Yes if you carry a spinnaker with a midgirth-to-foot measurement ratio of less than 85% but not less than 75%.● No,
● Yes,
GENOA/JIB LEECHNo Roach: No width measurements (LP only); Has Roach: Has width measurements (roach may be convex or concave).● No Roach - Leech is straight,
● Has Roach or Hollow,
LARGE ROACH HEADSAILAnswer Yes if you carry a headsail with a midgirth-to-foot measurement ratio of greater than 50% but less than 75%.● No,
● Yes,
MDL1length
MDL2Ylength
JIB FURLERDoes the genoa/jib (headsail) use a roller furling device?● Yes,
● No,
● Yes Above Deck,
● Yes Below Deck,
TLYlength
MAIN ROLLER FURLINGDoes the Main use a roller furling device?● No,
● Yes In Mast,
● Yes In Boom,
MDL2length
TLlength
BDlength
Rating Types
Rating TypeDefinition
RANDOM LEGAll-purpose course type (equal distance on all points of sail; sailing in a circle)
W50/L50Windward-Leeward downwind finish course type (even number of legs; 50% each, VMG Beat & Run)
W60/L40Windward-Leeward upwind finish course type (odd number of legs; 60% VMG Beat, 40% VMG Run)
MOSTLY WWMostly Windward course type (80% VMG Beat, 15% 90° Reach, 5% VMG Run)
MOSTLY LWMostly Leeward course type (50% VMG Run, 40% 120° Reach, 10% VMG Beat)
MOSTLY REACHMostly Reaching course type (8% VMG Beat, 21% each 52°, 75°, 110° & 135° Reach, 8% VMG Run)
GPHGeneral Purpose Handicap: a blend of Random Leg ratings for 8 and 12 kts TWS.
IR#International Rating Number: a ratings blend designed to best approximate US PHRF
Wind Types
Wind TypeDefinition
SingleAll-purpose wind blend
V.LightStandard 5-Winds:
LightStandard 5-Winds: 5-7 kts TWS Legacy 4-Winds: 5-10 kts TWS
MediumStandard 5-Winds: 9-15 kts TWS Legacy 4-Winds: 10-15 kts TWS
HeavyStandard 5-Winds: >15 kts TWS Legacy 4-Winds: >15 kts TWS
Lt/MedStandard 5-Winds: 7-9 kts TWS Legacy 4-Winds: n/a
44 kts TWS
66 kts TWS
88 kts TWS
1010 kts TWS
1212 kts TWS
1616 kts TWS
2020 kts TWS
2424 kts TWS
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