MARRIAH — ORC Rating | RegattaPages

GPH

627.4

OSN

605.2

LOA

17.37 m

Displacement

21678 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6095

Medium

0.8604

High

1.0686

Triple Offshore

Low

0.7942

Medium

1.093

High

1.2989

Boat Specifications

Dimensions

Length overall: 17.37 m
Beam: 4.8 m
Draft: 2.33 m
Displacement: 21678 kg
Crew weight: 957 kg
Wetted surface: 58.88 m²

Sails

Mainsail: 42.97 m²
Genoa: 63.39 m²
Spinnaker: 147.58 m²
Asymmetric spinnaker: 158.21 m²

Design

Type: Ketch Roper 57
Builder: Roper Yachts
Designer: Ian Linton
Year built: 1980
Stability index: 138.9

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.

6,46.6,4.395364,52,4.75,60,5.15,75,5.46,90,5.45,110,5.56,120,5.41,135,4.89,144.8,4.393346,150,4.15
8,44.2,5.230778,52,5.78,60,6.14,75,6.44,90,6.6,110,6.77,120,6.6,135,6.08,148.4,5.389051,150,5.29
10,43,5.879508,52,6.55,60,6.96,75,7.32,90,7.64,110,7.84,120,7.68,135,7.1,150,6.26,152,6.149855
12,43,6.494805,52,7.27,60,7.67,75,7.97,90,8.29,110,8.45,120,8.37,135,7.98,150,7.17,152.3,7.025124
14,43.5,7.113568,52,7.8,60,8.11,75,8.35,90,8.64,110,8.82,120,8.77,135,8.5,150,7.95,156.5,7.600374
16,43,7.451935,52,8.11,60,8.37,75,8.6,90,8.82,110,9.14,120,9.11,135,8.86,150,8.45,166.4,7.839821
20,42,7.670107,52,8.37,60,8.65,75,8.95,90,9.1,110,9.67,120,9.78,135,9.54,150,9.11,179,8.571305

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.75	5.15	5.46	5.45	5.56	5.41	4.89	4.15
8	5.78	6.14	6.44	6.6	6.77	6.6	6.08	5.29
10	6.55	6.96	7.32	7.64	7.84	7.68	7.1	6.26
12	7.27	7.67	7.97	8.29	8.45	8.37	7.98	7.17
14	7.8	8.11	8.35	8.64	8.82	8.77	8.5	7.95
16	8.11	8.37	8.6	8.82	9.14	9.11	8.86	8.45
20	8.37	8.65	8.95	9.1	9.67	9.78	9.54	9.11

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	46.6°	3.02	144.8°	3.59
8	44.2°	3.75	148.4°	4.59
10	43°	4.3	152°	5.43
12	43°	4.75	152.3°	6.22
14	43.5°	5.16	156.5°	6.97
16	43°	5.45	166.4°	7.62
20	42°	5.7	179°	8.57

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