Blue Note — ORC Rating

GPH

779.9

OSN

754.4

LOA

7.42 m

Displacement

1786 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5816

Medium

0.8019

High

0.9262

Triple Offshore

Low

0.7479

Medium

0.9812

High

1.1031

Boat Specifications

Dimensions

Length overall: 7.42 m
Beam: 2.73 m
Draft: 1.53 m
Displacement: 1786 kg
Crew weight: 367 kg
Wetted surface: 12.8 m²

Sails

Mainsail: 12.14 m²
Genoa: 20.54 m²
Spinnaker: 37.28 m²
Asymmetric spinnaker: 0 m²

Design

Type: Drifter 25 *1.48
Builder: Dekker
Designer: L Hoogmoed
Year built: 1976

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.

6,42.7,3.70111,52,4.15,60,4.38,75,4.55,90,4.49,110,4.45,120,4.32,135,3.88,148.3,3.420266,150,3.36
8,42,4.386763,52,4.95,60,5.21,75,5.37,90,5.33,110,5.41,120,5.3,135,4.83,150,4.25,152.1,4.175315
10,41.9,4.971037,52,5.46,60,5.63,75,5.77,90,5.83,110,5.91,120,5.84,135,5.6,150,5.06,152.4,4.953715
12,39.6,5.23028,52,5.72,60,5.86,75,5.99,90,6.12,110,6.23,120,6.17,135,5.98,150,5.67,165.6,5.213801
14,38.7,5.343205,52,5.86,60,6.01,75,6.18,90,6.33,110,6.56,120,6.51,135,6.28,150,6,180,5.59
16,38.7,5.394459,52,5.92,60,6.1,75,6.35,90,6.47,110,6.88,120,6.86,135,6.62,150,6.28,180,5.93
20,39.1,5.37339,52,5.93,60,6.13,75,6.53,90,6.85,110,7.26,120,7.48,135,7.31,150,6.91,180,6.48

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.15	4.38	4.55	4.49	4.45	4.32	3.88	3.36
8	4.95	5.21	5.37	5.33	5.41	5.3	4.83	4.25
10	5.46	5.63	5.77	5.83	5.91	5.84	5.6	5.06
12	5.72	5.86	5.99	6.12	6.23	6.17	5.98	5.67
14	5.86	6.01	6.18	6.33	6.56	6.51	6.28	6
16	5.92	6.1	6.35	6.47	6.88	6.86	6.62	6.28
20	5.93	6.13	6.53	6.85	7.26	7.48	7.31	6.91

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42.7°	2.72	148.3°	2.91
8	42°	3.26	152.1°	3.69
10	41.9°	3.7	152.4°	4.39
12	39.6°	4.03	165.6°	5.05
14	38.7°	4.17	180°	5.59
16	38.7°	4.21	180°	5.93
20	39.1°	4.17	180°	6.48

Loading polar chart…