Tramontana II — ORC Rating

GPH

612.5

OSN

606.7

LOA

13.2 m

Displacement

6903 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.7727

Medium

0.9834

High

1.108

Triple Offshore

Low

1.0077

Medium

1.2205

High

1.33

Boat Specifications

Dimensions

Length overall: 13.2 m
Beam: 2.25 m
Draft: 1.68 m
Displacement: 6903 kg
Crew weight: 605 kg
Wetted surface: 26.7 m²

Sails

Mainsail: 71.86 m²
Genoa: 40.17 m²
Spinnaker: 116.53 m²
Asymmetric spinnaker: 0 m²

Design

Type: 8mR
Builder: W. Hacht
Designer: W. Hacht
Year built: 1907

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.

6,42.9,5.050899,52,5.68,60,6.07,75,6.47,90,6.52,110,6.21,120,6.05,135,5.35,144.2,4.833159,150,4.53
8,42.1,5.593174,52,6.35,60,6.75,75,7.13,90,7.24,110,7.18,120,7.15,135,6.69,146.5,5.85212,150,5.64
10,42.2,5.979984,52,6.71,60,7.05,75,7.39,90,7.58,110,7.5,120,7.62,135,7.41,149.7,6.717663,150,6.7
12,42.2,6.209465,52,6.91,60,7.21,75,7.53,90,7.77,110,7.72,120,7.86,135,7.81,150,7.4,158.3,7.060349
14,42.8,6.391998,52,7.02,60,7.31,75,7.62,90,7.9,110,7.98,120,8.07,135,8.21,150,7.79,180,7.18
16,41.7,6.388637,52,7.05,60,7.36,75,7.68,90,7.99,110,8.22,120,8.28,135,8.6,150,8.18,180,7.61
20,42.6,6.561634,52,7.2,60,7.47,75,7.72,90,8.11,110,8.56,120,8.63,135,9.06,150,9.04,180,8.37

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.68	6.07	6.47	6.52	6.21	6.05	5.35	4.53
8	6.35	6.75	7.13	7.24	7.18	7.15	6.69	5.64
10	6.71	7.05	7.39	7.58	7.5	7.62	7.41	6.7
12	6.91	7.21	7.53	7.77	7.72	7.86	7.81	7.4
14	7.02	7.31	7.62	7.9	7.98	8.07	8.21	7.79
16	7.05	7.36	7.68	7.99	8.22	8.28	8.6	8.18
20	7.2	7.47	7.72	8.11	8.56	8.63	9.06	9.04

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.9°	3.7	144.2°	3.92
8	42.1°	4.15	146.5°	4.88
10	42.2°	4.43	149.7°	5.8
12	42.2°	4.6	158.3°	6.56
14	42.8°	4.69	180°	7.18
16	41.7°	4.77	180°	7.61
20	42.6°	4.83	180°	8.37

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