CASSIOPEA — ORC Rating

GPH

695.5

OSN

672.2

LOA

7.64 m

Displacement

1285 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5836

Medium

0.7987

High

0.9195

Triple Offshore

Low

0.7512

Medium

0.9732

High

1.1064

Boat Specifications

Dimensions

Length overall: 7.64 m
Beam: 2.38 m
Draft: 1.58 m
Displacement: 1285 kg
Crew weight: 400 kg
Wetted surface: 13.12 m²

Sails

Mainsail: 18.76 m²
Genoa: 15.62 m²
Spinnaker: 39.45 m²
Asymmetric spinnaker: 0 m²

Design

Type: Surprise
Builder: Archambault
Designer: Joubert/Nivelt
Year built: 1977
Stability index: 98.3

Velocity Prediction

Polar CSV

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

6,42.6,4.292912,52,4.79,60,5.03,75,5.18,90,5.07,110,5.09,120,4.92,135,4.39,146,3.799587,150,3.64
8,40.8,5.072688,52,5.63,60,5.81,75,5.92,90,5.97,110,6.01,120,5.89,135,5.36,150,4.66,150.5,4.64178
10,38.4,5.499599,52,6.06,60,6.2,75,6.32,90,6.44,110,6.55,120,6.44,135,6.11,150,5.54,152.9,5.391969
12,36.6,5.704908,52,6.3,60,6.47,75,6.65,90,6.76,110,7.04,120,6.96,135,6.59,150,6.17,161,5.816914
14,36,5.772437,52,6.43,60,6.64,75,6.93,90,7.02,110,7.5,120,7.47,135,7.08,150,6.61,176.3,6.062637
16,35.8,5.831847,52,6.51,60,6.75,75,7.12,90,7.35,110,7.91,120,8.06,135,7.62,150,7.07,177.2,6.467722
20,36.4,5.9014,52,6.6,60,6.86,75,7.34,90,7.86,110,8.54,120,9.32,135,9.13,150,8.14,176.6,7.312872

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.79	5.03	5.18	5.07	5.09	4.92	4.39	3.64
8	5.63	5.81	5.92	5.97	6.01	5.89	5.36	4.66
10	6.06	6.2	6.32	6.44	6.55	6.44	6.11	5.54
12	6.3	6.47	6.65	6.76	7.04	6.96	6.59	6.17
14	6.43	6.64	6.93	7.02	7.5	7.47	7.08	6.61
16	6.51	6.75	7.12	7.35	7.91	8.06	7.62	7.07
20	6.6	6.86	7.34	7.86	8.54	9.32	9.13	8.14

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.6°	3.16	146°	3.15
8	40.8°	3.84	150.5°	4.04
10	38.4°	4.31	152.9°	4.8
12	36.6°	4.58	161°	5.5
14	36°	4.67	176.3°	6.05
16	35.8°	4.73	177.2°	6.46
20	36.4°	4.75	176.6°	7.3

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