Sirena: ORC Rating

GPH

614.6

OSN

597.2

LOA

11.924 m

Displacement

7236 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6501

Medium

0.8909

High

1.0302

Triple Offshore

Low

0.8446

Medium

1.1063

High

1.2424

Boat Specifications

Dimensions

Length overall: 11.924 m
Beam: 3.77 m
Draft: 1.9 m
Displacement: 7236 kg
Crew weight: 720 kg
Wetted surface: 31.73 m²

Sails

Mainsail: 47.14 m²
Genoa: 36.2 m²
Spinnaker: 100.57 m²
Asymmetric spinnaker: 0 m²

Design

Type: First 40.7x1.90
Builder: Beneteau
Designer: Bruce Farr
Year built: 1997

Performance data

Polar CSV

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

6,43.5,4.645877,52,5.23,60,5.58,75,5.88,90,5.82,110,5.77,120,5.61,135,5.06,144.5,4.532526,150,4.27
8,42.4,5.55213,52,6.24,60,6.59,75,6.88,90,6.88,110,7,120,6.84,135,6.25,149,5.436512,150,5.39
10,41.6,6.245001,52,6.98,60,7.24,75,7.43,90,7.53,110,7.66,120,7.57,135,7.18,150,6.37,151,6.311314
12,41.2,6.65856,52,7.33,60,7.55,75,7.74,90,7.8,110,8.07,120,8.01,135,7.71,150,7.2,155.5,6.912382
14,40.5,6.759547,52,7.47,60,7.7,75,7.96,90,8.08,110,8.45,120,8.44,135,8.11,150,7.69,170,7.047061
16,40.3,6.805055,52,7.53,60,7.77,75,8.13,90,8.35,110,8.72,120,8.88,135,8.55,150,8.06,180,7.5
20,40.9,6.972251,52,7.6,60,7.82,75,8.26,90,8.79,110,9.14,120,9.55,135,9.53,150,8.9,180,8.25

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.23	5.58	5.88	5.82	5.77	5.61	5.06	4.27
8	6.24	6.59	6.88	6.88	7	6.84	6.25	5.39
10	6.98	7.24	7.43	7.53	7.66	7.57	7.18	6.37
12	7.33	7.55	7.74	7.8	8.07	8.01	7.71	7.2
14	7.47	7.7	7.96	8.08	8.45	8.44	8.11	7.69
16	7.53	7.77	8.13	8.35	8.72	8.88	8.55	8.06
20	7.6	7.82	8.26	8.79	9.14	9.55	9.53	8.9

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43.5°	3.37	144.5°	3.69
8	42.4°	4.1	149°	4.66
10	41.6°	4.67	151°	5.52
12	41.2°	5.01	155.5°	6.29
14	40.5°	5.14	170°	6.94
16	40.3°	5.19	180°	7.5
20	40.9°	5.27	180°	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°	5.23	6.24	6.98	7.33	7.47	7.53	7.60
60°	5.58	6.59	7.24	7.55	7.70	7.77	7.82
75°	5.88	6.88	7.43	7.74	7.96	8.13	8.26
90°	5.82	6.88	7.53	7.80	8.08	8.35	8.79
110°	5.77	7.00	7.66	8.07	8.45	8.72	9.14
120°	5.61	6.84	7.57	8.01	8.44	8.88	9.55
135°	5.06	6.25	7.18	7.71	8.11	8.55	9.53
150°	4.27	5.39	6.37	7.20	7.69	8.06	8.90