La Bamba — ORC Rating

GPH

722

OSN

703.5

LOA

8.7 m

Displacement

3982 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5746

Medium

0.7638

High

0.8626

Triple Offshore

Low

0.7347

Medium

0.9346

High

1.0279

Boat Specifications

Dimensions

Length overall: 8.7 m
Beam: 2.87 m
Draft: 1.66 m
Displacement: 3982 kg
Crew weight: 380 kg
Wetted surface: 18.36 m²

Sails

Mainsail: 21.32 m²
Genoa: 27.19 m²
Spinnaker: 65.62 m²
Asymmetric spinnaker: 0 m²

Design

Type: First 30
Builder: Beneteau
Designer: Briand
Year built: 1978

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.

6,42,4.036898,52,4.54,60,4.77,75,4.95,90,4.9,110,4.97,120,4.84,135,4.45,148,3.903081,150,3.82
8,40.7,4.682547,52,5.3,60,5.57,75,5.77,90,5.79,110,5.95,120,5.85,135,5.4,150,4.74,152,4.654863
10,41.2,5.263054,52,5.84,60,6.03,75,6.17,90,6.27,110,6.4,120,6.36,135,6.14,150,5.59,151,5.545267
12,41.2,5.568736,52,6.09,60,6.25,75,6.4,90,6.44,110,6.7,120,6.68,135,6.5,150,6.18,162,5.793557
14,40.9,5.662473,52,6.19,60,6.37,75,6.56,90,6.64,110,6.94,120,6.98,135,6.8,150,6.5,180,6.06
16,40.5,5.681176,52,6.24,60,6.42,75,6.68,90,6.82,110,7.09,120,7.27,135,7.12,150,6.78,180,6.41
20,41.2,5.688351,52,6.24,60,6.45,75,6.8,90,7.12,110,7.33,120,7.59,135,7.72,150,7.38,180,6.96

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.54	4.77	4.95	4.9	4.97	4.84	4.45	3.82
8	5.3	5.57	5.77	5.79	5.95	5.85	5.4	4.74
10	5.84	6.03	6.17	6.27	6.4	6.36	6.14	5.59
12	6.09	6.25	6.4	6.44	6.7	6.68	6.5	6.18
14	6.19	6.37	6.56	6.64	6.94	6.98	6.8	6.5
16	6.24	6.42	6.68	6.82	7.09	7.27	7.12	6.78
20	6.24	6.45	6.8	7.12	7.33	7.59	7.72	7.38

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	42°	3	148°	3.31
8	40.7°	3.55	152°	4.11
10	41.2°	3.96	151°	4.85
12	41.2°	4.19	162°	5.51
14	40.9°	4.28	180°	6.06
16	40.5°	4.32	180°	6.41
20	41.2°	4.28	180°	6.96

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