Najaden: ORC Rating

GPH

688

OSN

670.2

LOA

10.5 m

Displacement

4668 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6717

Medium

0.8985

High

1.0243

Triple Offshore

Low

0.8645

Medium

1.1061

High

1.2206

Boat Specifications

Dimensions

Length overall: 10.5 m
Beam: 2.7 m
Draft: 1.79 m
Displacement: 4668 kg
Crew weight: 534 kg
Wetted surface: 22.11 m²

Sails

Mainsail: 32.88 m²
Genoa: 24.22 m²
Spinnaker: 60.12 m²
Asymmetric spinnaker: 0 m²

Design

Type: Rhapsody 34
Builder: Dahlstrøm båt
Designer: Göran Dahlström
Year built: 1976

Performance data

Polar CSV

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

6,42,4.252199,52,4.77,60,5.01,75,5.2,90,5.21,110,5.21,120,5.03,135,4.54,146.4,4.009983,150,3.86
8,40.6,4.991628,52,5.67,60,5.95,75,6.14,90,6.25,110,6.28,120,6.12,135,5.57,150,4.86,151.5,4.79053
10,40.9,5.569863,52,6.22,60,6.42,75,6.58,90,6.69,110,6.78,120,6.69,135,6.39,150,5.74,152.3,5.624617
12,41,5.830057,52,6.43,60,6.62,75,6.8,90,6.86,110,7.08,120,7.02,135,6.8,150,6.44,160,6.065813
14,40.7,5.922433,52,6.51,60,6.71,75,6.94,90,7.06,110,7.33,120,7.34,135,7.1,150,6.81,180,6.32
16,40.6,5.953076,52,6.55,60,6.76,75,7.04,90,7.24,110,7.5,120,7.66,135,7.44,150,7.1,180,6.72
20,40.3,6.083903,52,6.65,60,6.82,75,7.12,90,7.51,110,7.77,120,8.07,135,8.17,150,7.75,180,7.31

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.77	5.01	5.2	5.21	5.21	5.03	4.54	3.86
8	5.67	5.95	6.14	6.25	6.28	6.12	5.57	4.86
10	6.22	6.42	6.58	6.69	6.78	6.69	6.39	5.74
12	6.43	6.62	6.8	6.86	7.08	7.02	6.8	6.44
14	6.51	6.71	6.94	7.06	7.33	7.34	7.1	6.81
16	6.55	6.76	7.04	7.24	7.5	7.66	7.44	7.1
20	6.65	6.82	7.12	7.51	7.77	8.07	8.17	7.75

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3.16	146.4°	3.34
8	40.6°	3.79	151.5°	4.21
10	40.9°	4.21	152.3°	4.98
12	41°	4.4	160°	5.7
14	40.7°	4.49	180°	6.32
16	40.6°	4.52	180°	6.72
20	40.3°	4.64	180°	7.31

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°	4.77	5.67	6.22	6.43	6.51	6.55	6.65
60°	5.01	5.95	6.42	6.62	6.71	6.76	6.82
75°	5.20	6.14	6.58	6.80	6.94	7.04	7.12
90°	5.21	6.25	6.69	6.86	7.06	7.24	7.51
110°	5.21	6.28	6.78	7.08	7.33	7.50	7.77
120°	5.03	6.12	6.69	7.02	7.34	7.66	8.07
135°	4.54	5.57	6.39	6.80	7.10	7.44	8.17
150°	3.86	4.86	5.74	6.44	6.81	7.10	7.75