RISIKO: ORC Rating

GPH

748.6

OSN

728.3

LOA

7.511 m

Displacement

1056 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5568

Medium

0.7403

High

0.819

Triple Offshore

Low

0.7155

Medium

0.8988

High

0.9862

Boat Specifications

Dimensions

Length overall: 7.511 m
Beam: 2.52 m
Draft: 1.36 m
Displacement: 1056 kg
Crew weight: 320 kg
Wetted surface: 10.79 m²

Sails

Mainsail: 15.79 m²
Genoa: 12.41 m²
Spinnaker: 25.25 m²
Asymmetric spinnaker: 0 m²

Design

Type: Rivetto
Builder: Negri Nautica
Designer: Fontana/Maletto/Na
Year built: 1978
Stability index: 80

Performance data

Polar CSV

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

6,43.5,4.204725,52,4.65,60,4.88,75,5,90,4.92,110,4.82,120,4.64,135,4.08,146.9,3.545343,150,3.42
8,40.8,4.861326,52,5.36,60,5.52,75,5.62,90,5.63,110,5.63,120,5.5,135,5.04,150,4.42,151.4,4.362271
10,38.4,5.104036,52,5.65,60,5.8,75,5.93,90,6.02,110,6.07,120,5.97,135,5.7,150,5.24,157.7,4.950229
12,38.2,5.20451,52,5.77,60,5.93,75,6.14,90,6.24,110,6.44,120,6.34,135,6.08,150,5.77,170,5.310681
14,38.8,5.273707,52,5.82,60,6,75,6.27,90,6.46,110,6.78,120,6.73,135,6.44,150,6.13,179,5.71087
16,39.3,5.298251,52,5.85,60,6.04,75,6.36,90,6.65,110,7.11,120,7.18,135,6.85,150,6.47,179,6.060923
20,41.2,5.329506,52,5.84,60,6.07,75,6.45,90,6.9,110,7.63,120,8.33,135,8.21,150,7.35,178.4,6.732625

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.65	4.88	5	4.92	4.82	4.64	4.08	3.42
8	5.36	5.52	5.62	5.63	5.63	5.5	5.04	4.42
10	5.65	5.8	5.93	6.02	6.07	5.97	5.7	5.24
12	5.77	5.93	6.14	6.24	6.44	6.34	6.08	5.77
14	5.82	6	6.27	6.46	6.78	6.73	6.44	6.13
16	5.85	6.04	6.36	6.65	7.11	7.18	6.85	6.47
20	5.84	6.07	6.45	6.9	7.63	8.33	8.21	7.35

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.5°	3.05	146.9°	2.97
8	40.8°	3.68	151.4°	3.83
10	38.4°	4	157.7°	4.58
12	38.2°	4.09	170°	5.23
14	38.8°	4.11	179°	5.71
16	39.3°	4.1	179°	6.06
20	41.2°	4.01	178.4°	6.73

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°	4.65	5.36	5.65	5.77	5.82	5.85	5.84
60°	4.88	5.52	5.80	5.93	6.00	6.04	6.07
75°	5.00	5.62	5.93	6.14	6.27	6.36	6.45
90°	4.92	5.63	6.02	6.24	6.46	6.65	6.90
110°	4.82	5.63	6.07	6.44	6.78	7.11	7.63
120°	4.64	5.50	5.97	6.34	6.73	7.18	8.33
135°	4.08	5.04	5.70	6.08	6.44	6.85	8.21
150°	3.42	4.42	5.24	5.77	6.13	6.47	7.35