Tramontana II: ORC Rating

GPH

616.7

OSN

609.5

LOA

13.2 m

Displacement

6780 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.699

Medium

0.8788

High

0.9866

Triple Offshore

Low

0.8988

Medium

1.0719

High

1.1617

Boat Specifications

Dimensions

Length overall: 13.2 m
Beam: 2.25 m
Draft: 1.67 m
Displacement: 6780 kg
Crew weight: 605 kg
Wetted surface: 26.46 m²

Sails

Mainsail: 71.91 m²
Genoa: 39.86 m²
Spinnaker: 116.53 m²
Asymmetric spinnaker: 0 m²

Design

Type: 8mR
Builder: W. Hacht
Designer: W. Hacht
Year built: 1907
Stability index: 186.5

Performance data

Polar CSV

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

6,41.8,5.110829,52,5.74,60,6.07,75,6.39,90,6.42,110,6.15,120,6.05,135,5.44,143,4.970979,150,4.58
8,40.6,5.557961,52,6.26,60,6.56,75,6.86,90,6.98,110,6.93,120,6.95,135,6.62,147.8,5.837911,150,5.7
10,39.9,5.852716,52,6.56,60,6.82,75,7.1,90,7.27,110,7.26,120,7.41,135,7.28,150,6.65,152.3,6.516875
12,39.4,6.030539,52,6.75,60,6.98,75,7.25,90,7.45,110,7.52,120,7.65,135,7.69,150,7.31,159.5,6.928785
14,39.1,6.14654,52,6.87,60,7.1,75,7.36,90,7.58,110,7.72,120,7.84,135,8.01,150,7.72,175.4,7.102879
16,39.4,6.250537,52,6.95,60,7.17,75,7.44,90,7.68,110,7.88,120,8,135,8.31,150,8.09,179,7.531147
20,40,6.344279,52,7.02,60,7.25,75,7.55,90,7.82,110,8.13,120,8.28,135,8.73,150,8.85,178.4,8.253218

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.74	6.07	6.39	6.42	6.15	6.05	5.44	4.58
8	6.26	6.56	6.86	6.98	6.93	6.95	6.62	5.7
10	6.56	6.82	7.1	7.27	7.26	7.41	7.28	6.65
12	6.75	6.98	7.25	7.45	7.52	7.65	7.69	7.31
14	6.87	7.1	7.36	7.58	7.72	7.84	8.01	7.72
16	6.95	7.17	7.44	7.68	7.88	8	8.31	8.09
20	7.02	7.25	7.55	7.82	8.13	8.28	8.73	8.85

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	41.8°	3.81	143°	3.97
8	40.6°	4.22	147.8°	4.94
10	39.9°	4.49	152.3°	5.77
12	39.4°	4.66	159.5°	6.49
14	39.1°	4.77	175.4°	7.08
16	39.4°	4.83	179°	7.53
20	40°	4.86	178.4°	8.25

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°	5.74	6.26	6.56	6.75	6.87	6.95	7.02
60°	6.07	6.56	6.82	6.98	7.10	7.17	7.25
75°	6.39	6.86	7.10	7.25	7.36	7.44	7.55
90°	6.42	6.98	7.27	7.45	7.58	7.68	7.82
110°	6.15	6.93	7.26	7.52	7.72	7.88	8.13
120°	6.05	6.95	7.41	7.65	7.84	8.00	8.28
135°	5.44	6.62	7.28	7.69	8.01	8.31	8.73
150°	4.58	5.70	6.65	7.31	7.72	8.09	8.85