US Sailing
Universal Measurement System (UMS)
Measurer Seminar
HPR Measurement & Processing
HPR Measured Items - Hull
HULL / FLOTATION / WEIGHT DATA
Age Date
Length Overall 1
Forward Overhang 2
Height of Transom 3
Stem to Forward Freeboard Station
Stem to Aft Freeboard Station
Freeboard Forward Measured
Freeboard Aft Measured
Freeboard at Fore Side of Mast 4
Freeboard at Maximum Draft 1
Specific Gravity
Displacement as Weighed 1, 5
Maximum Beam 1
Station of Maximum Draft 1
Deepest Point of Keel to Sheerline 1
Measured Draft 8
Keel Weight 5
Keel Vertical Center of Gravity 5
Crew Weight
LOA
FO
Y
SFFP
SAFP
FFM
FAM
FBI
FMD
SG
DSPW
MB
SDM
DMT
DHKM
KW
KCG
CW
Possible Source
IRC
ORR
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
2
HPR Measured Items - Rig
RIG DATA
Foretriangle Base
Mainsail Hoist
Mainsail Foot
Height of Headsail Hoist
Height of Spinnaker Hoist
Tacking Point of Spinnaker 6
Spinnaker Pole Length 6, 7
Boom Aft Sheeting Limit
Boom Depth
Boom Above Sheerline
Forestay Perpendicular
Chainplate Width
Chainplate Diagonal
Mast Weight 5
Mast Vertical Center of Gravity 5
Boom Weight 5
No. of Running Backstays / Checkstays
No. of Spreader Pairs
J
P
E
IG
ISP
TPS
SPL
BAL
BD
BAS
FSP
CPW
CPD
MWT
MCG
BWT
Possible Source
IRC
ORR
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
3
HPR Measured Items - Sails
MAINSAIL
Mainsail Top Width
Mainsail 7/8 Width
Mainsail 3/4 Width
Mainsail 1/2 Width
Mainsail 1/4 Width
HEADSAIL
Headsail Luff
Headsail Perpendicular
Headsail Top Width
Headsail 7/8 Width
Headsail 3/4 Width
Headsail 1/2 Width
Headsail 1/4 Width
ASYMMETRIC SPINNAKER
Asymmetric Luff
Asymmetric Leech
Asymmetric Mid Width
Asymmetric Foot
SYMMETRIC SPINNAKER
Symmetric Luff / Leech 7
Spinnaker Mid Width 7
Spinnaker Foot 7
HB
MGT
MGU
MGM
MGL
Possible Source
IRC
ORR
X
X
X
X
X
X
X
X
JL
LPG
JH
JGT
JGU
JGM
JGL
X
X
SLU
SLE
AMG
ASF
X
X
X
X
X
X
X
X
SL
SMG
SF
X
X
X
X
X
X
X
X
X
X
X
X
X
4
HPR Measured Items - Other
FLAGS
Twin Rudders
Production Sail/Shaft Drive Installed
Hull and Deck, High Modulus Material
Spars, High Modulus Material
Production Boat
Component Method used for VCG
Lifting without Slings
RUD2
PSP
HDHM
SPHM
ESOC
KEEL
LEYE
1
Measurement required if the boat does not have an offset file
FO - Credit for 2012 and earlier for raked stems, if not entered stem is assumed vertical
3 Y - Only required for immersed transoms 2013 and later
4 FBI - Always measure when measuring FFM/FAM; sometimes can be calculated from ORR/ORCi
5 Measurement required if VCG to be determined via component method
- Measurement of all 6 items - DSPW, KW, KCG, MWT, MCG and BWT are required if using component method
6 Either TPS or SPL, but not both
7 Symmetric spinnakers and pole only applicable for boats with Age Date 2012 or earlier
8 Measured draft DHKM = DMT - FMD or as measured for Endorsed IRC certificate
2
5
HPR Measured Items - FO
• FO - Forward Overhang
- if the bow knuckle is above the waterline, FO shall be the horizontal distance from
the forward end of LOA to the point where a 45 degree angle intersects the knuckle
- if the bow knuckle is below the waterline, FO equals the horizontal distance from the
forward end of LOA to the intersection of the stem with the waterline
• IMS B6.10
Note: With exposed knuckle, FO is independent of trim/float condition
Note: FO = IRC BO - IRC x
6
HPR Measured Items - FBI
• FBI - Freeboard at Fore Side of Mast
- the average of port and starboard freeboards measured vertically from the sheer
point to the water level at the section at the fore side of the mast
• IMS B6.8
Point to Measure FBI
7
HPR Measured Items - CPW / CPD
• CPW - Chainplate Width
- the distance between the centers of the bearing points of the chainplates for the
upper shrouds of the mainmast
• CPD - Chainplate Diagonal
- the distance between the center of the bearing point of the chainplate for the upper
shrouds to the mainmast centerline
• IMS F6.3 / F6.4
8
HPR Measurement Requirements - Vcg Source
• Component Method
- Full hull measurement in empty lightship condition
-- Length, beam, draft, overhangs, freeboards
-- Weigh boat
-- Weigh keel/bulb and determine cg
- Full rig measurement - plus mast weight/cg and boom weight
- Full sail measurement
• Incline Method
- Verified offsets file required
- Incline and measure freeboards in empty lightship condition
-- Weighing highly desireable
- Full rig measurement
- Full sail measurement
9
HPR Measurement Requirements
• Never Rated under any Rule -- Full Measurement:
- Vcg via Component Method
- Vcg via Incline Method
• Boats with Fully Measured ORR certificate:
- Vcg (lightship):
-- Direct from ORR incline/float data if boat measured in lightship condition
-- Calculated from ORR incline/float data if boat measured in ORR trim IF complete
Measurement Inventory with weights and location is available
-- Otherwise, new freeboards required (but not incline)
- In-water: FBI and Y measured in lightship
- Rig: CPD, CPW measured
- Sails: Additional headsail dimensions required
• Boats with Endorsed* IRC certificate:
- Vcg via Incline Method or Component Method
- In-water: FFM, FAM, FBI measured in lightship
- Rig: IG, ISP, BAS, BD, FSP, CPD, CPW measured
- Sails: Additional mainsail and headsail dimensions required
* Endorsed with scale weight or DSPM and measured hull data
IRC One Design certificates are Endorsed but not weighed and measured
There are a few IRC Endorsed certificates based on RORC Standard Hull Data
• Talk to Offshore first
- Confirm what data is on file
- Confirm what data needs to be measured
10
HPR Processing Flow
Inputs from Measurer
Incline Method Pre-processing (lightship)
- VPP run
-- Vcg
-- Measurement trim freeboard calculation
-- Weight and draft
Hull
Measurements
Rig and Sail
Measurements
Incline Method Pre-processing (ORR trim)
- Vcg moment calculation with Measurement
Inventory data
- Empty weight calculation
- VPP run
-- Measurement trim freeboard calculation
-- Draft
Component Method Pre-processing
- Vcg moment calculation from individual
hull, keel/bulb, mast and boom weights
and cgs
- Measurement trim freeboard calculation
Hull Measurements and Calculations
HPR Calculator
11
HPR Calculator and Certificate
Name
Owner
Class
Cert
Sail Number
Issue Date
LOA
FO
Y
Watermark
Age Date
BM
FF
FBI
FA
DRA
VCG incline
CW
Dempty
BEECOM
HAMACHI
RACER X
ROCK & ROLL
TAI KUAI
WHIPLASH
Anatole Masfen
Greg Slyngstad
Gary Redelberger
Bernard Girod
Daniel Thielman
Donald Payan
TP52
J125
Farr 36 OD
Farr 400
R/P 44
MC 38
WICKED SISTER
Farr 36 OD
2014 Big Boat Series
2014 Big Boat Series
2014 Big Boat Series
2014 Big Boat Series
2014 Big Boat Series
2014 Big Boat Series
2014 Big Boat Series
JPN5535
USA13696
USA6
USA400
USA7676
USA38100
USA3
JOHN CORDA
15.850
0.010
0.050
12.527
0.370
0.100
10.960
0.110
0.070
12.200
0.038
0.070
13.300
0.030
0.190
11.280
0.000
0.060
11.000
0.110
0.080
2011
4.420
1.491
1.206
1.133
3.348
-1.191
1297.0
7296.0
1998
3.194
1.292
0.993
0.793
2.479
-0.469
835.0
4239.7
2006
3.570
1.208
1.090
0.862
2.619
-0.322
715.0
3313.0
2011
3.410
1.375
1.299
0.924
2.894
-0.627
800.0
3991.0
2003
3.550
1.439
1.321
1.114
3.340
-1.047
994.0
5935.0
2011
3.520
1.028
0.943
0.718
2.800
-0.618
718.0
3275.0
2004
3.582
1.217
1.095
0.865
2.613
-0.536
728.0
3220.0
J
P
E
IG
ISP
8.700
20.400
7.110
22.400
20.400
4.471
14.182
5.468
14.944
15.874
3.980
15.220
5.680
14.330
16.732
4.470
16.150
5.800
15.569
17.862
4.900
17.740
6.400
17.080
19.747
4.590
16.500
4.990
15.873
17.782
4.010
15.219
5.707
14.261
16.787
BAL
BD
BAS
FSP
0.152
0.335
2.130
0.054
0.000
0.162
1.518
0.064
0.164
0.167
1.413
0.054
0.000
0.000
1.595
0.071
0.000
0.000
1.901
0.064
0.000
0.198
1.322
0.000
0.168
0.176
1.386
0.070
CPD
CPW
0.135
1
0.135
1
1.691
3.017
0.135
1
0.135
1
0.135
1
0.135
1
MWT
MCG
BWT
Runners
Spreaders
TPS
301.0
7.950
140.2
5.057
157.0
5.120
166.5
5.355
0
3
8.700
0
2
6.632
0
2
6.477
0
2
6.820
0
3
6.710
140
6.039
13.6
0
2
7.050
0
2
6.451
1.243
2.238
3.226
4.759
6.017
0.205
1.280
2.250
3.690
4.650
0.170
1.490
2.561
3.925
4.880
1.000
1.710
2.550
3.860
4.890
0.230
1.600
2.490
3.910
5.170
1.260
1.860
2.650
3.680
4.400
0.180
1.540
2.600
3.920
4.870
19.938
6.250
0.140
0.966
1.767
3.236
4.706
14.160
6.890
0.100
0.885
1.720
3.430
5.140
14.360
4.202
0.070
0.624
1.199
2.292
3.271
15.980
4.490
0.120
0.740
1.310
2.700
3.440
16.820
4.900
0.125
0.790
1.390
2.530
3.730
16.160
4.670
0.120
0.740
1.340
2.550
3.650
14.450
4.200
0.080
0.650
1.180
2.230
3.230
25.300
21.030
13.539
13.545
18.280
16.270
11.270
11.980
18.850
16.350
11.038
10.848
20.360
17.450
11.140
11.560
22.000
19.500
11.310
11.500
20.440
17.480
11.620
12.000
19.200
16.650
10.470
10.900
Spars
Mainsail
HB
MGT
MGU
MGM
MGL
Jib
Jib luff
LPG
JH
JGT
JGU
JGM
JGL
Ayso
SLU
SLE
AMG
ASF
12