PERCEPTION: ORC Rating

GPH

769.8

OSN

738.6

LOA

15.164 m

Displacement

23149 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.4753

Medium

0.6552

High

0.7849

Triple Offshore

Low

0.6473

Medium

0.8864

High

1.0427

Boat Specifications

Dimensions

Length overall: 15.164 m
Beam: 4.12 m
Draft: 1.51 m
Displacement: 23149 kg
Crew weight: 1063 kg
Wetted surface: 59.36 m²

Sails

Mainsail: 43.48 m²
Genoa: 50.28 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 103.47 m²

Design

Type: CTM HERRESHOFF SCN
Builder: New Zeland
Designer: N. Herreshoff
Year built: 1924

Performance data

Polar CSV

Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into Offwind or compatible navigation software.

6,52,3.39,54.8,3.625751,60,4.04,75,4.8,90,5.08,110,5.18,120,4.97,135,4.38,147,3.851333,150,3.73
8,52,4.33,53.6,4.499351,60,5.06,75,5.85,90,6.17,110,6.32,120,6.15,135,5.61,148,4.940758,150,4.84
10,52,5.02,52.9,5.122611,60,5.77,75,6.54,90,7.09,110,7.29,120,7.12,135,6.58,148,5.943059,150,5.82
12,52,5.53,52.5,5.585111,60,6.33,75,7.21,90,7.85,110,8.02,120,7.91,135,7.44,148.5,6.732031,150,6.63
14,48,4.214424,52,5.9,60,6.82,75,7.73,90,8.27,110,8.42,120,8.35,135,8.06,150,7.36,176,6.425653
16,52,6.19,52.9,6.316229,60,7.19,75,8.04,90,8.52,110,8.69,120,8.64,135,8.43,150,7.94,176,7.117337
20,48.2,5.626133,52,6.55,60,7.61,75,8.34,90,8.73,110,9.2,120,9.18,135,8.97,150,8.56,179,8.171245

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	3.39	4.04	4.8	5.08	5.18	4.97	4.38	3.73
8	4.33	5.06	5.85	6.17	6.32	6.15	5.61	4.84
10	5.02	5.77	6.54	7.09	7.29	7.12	6.58	5.82
12	5.53	6.33	7.21	7.85	8.02	7.91	7.44	6.63
14	5.9	6.82	7.73	8.27	8.42	8.35	8.06	7.36
16	6.19	7.19	8.04	8.52	8.69	8.64	8.43	7.94
20	6.55	7.61	8.34	8.73	9.2	9.18	8.97	8.56

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	54.8°	2.09	147°	3.23
8	53.6°	2.67	148°	4.19
10	52.9°	3.09	148°	5.04
12	52.5°	3.4	148.5°	5.74
14	48°	2.82	176°	6.41
16	52.9°	3.81	176°	7.1
20	48.2°	3.75	179°	8.17

VPP POLAR · BOAT SPEED BY TWAKT

TRUE WIND ANGLE —

READ AT ANGLE

Hover or tap the chart, or use the slider, to read boat speeds.

True wind speed 6 kt8 kt10 kt12 kt14 kt16 kt20 kt

Data table

Boat speed by true wind angle and true wind speed
TWA	Boat speed in 6 kt (kt)	Boat speed in 8 kt (kt)	Boat speed in 10 kt (kt)	Boat speed in 12 kt (kt)	Boat speed in 14 kt (kt)	Boat speed in 16 kt (kt)	Boat speed in 20 kt (kt)
0°	0.00	0.00	0.00	0.00	0.00	0.00	0.00
52°	3.39	4.33	5.02	5.53	5.90	6.19	6.55
60°	4.04	5.06	5.77	6.33	6.82	7.19	7.61
75°	4.80	5.85	6.54	7.21	7.73	8.04	8.34
90°	5.08	6.17	7.09	7.85	8.27	8.52	8.73
110°	5.18	6.32	7.29	8.02	8.42	8.69	9.20
120°	4.97	6.15	7.12	7.91	8.35	8.64	9.18
135°	4.38	5.61	6.58	7.44	8.06	8.43	8.97
150°	3.73	4.84	5.82	6.63	7.36	7.94	8.56