Semiramis: ORC Rating

GPH

690.4

OSN

666.7

LOA

11.1 m

Displacement

6300 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.5702

Medium

0.7943

High

0.9254

Triple Offshore

Low

0.7394

Medium

0.9923

High

1.1199

Boat Specifications

Dimensions

Length overall: 11.1 m
Beam: 3.64 m
Draft: 1.92 m
Displacement: 6300 kg
Crew weight: 603 kg
Wetted surface: 27.69 m²

Sails

Mainsail: 29.74 m²
Genoa: 36.62 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 83.32 m²

Design

Type: Apollo 12
Builder: Dromor
Designer: Judel / Vrolijk
Year built: 1990
Stability index: 110.5

Performance data

Polar CSV

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

6,45,4.157788,52,4.56,60,4.85,75,5.01,90,4.99,110,5.06,120,4.87,135,4.36,144.8,3.916074,150,3.69
8,43.2,5.020792,52,5.55,60,5.82,75,6.01,90,6.09,110,6.21,120,6.03,135,5.51,146,4.969618,150,4.76
10,41.4,5.585839,52,6.22,60,6.46,75,6.63,90,6.78,110,6.9,120,6.81,135,6.42,146.2,5.884587,150,5.65
12,40.5,6.009948,52,6.62,60,6.81,75,6.97,90,7.13,110,7.28,120,7.23,135,6.98,146.9,6.529638,150,6.32
14,39.6,6.203657,52,6.84,60,7.02,75,7.19,90,7.34,110,7.56,120,7.55,135,7.34,149.2,6.79892,150,6.75
16,39.4,6.315243,52,6.96,60,7.15,75,7.36,90,7.45,110,7.82,120,7.84,135,7.65,150,7.07,172.1,6.390651
20,39.4,6.379948,52,7.03,60,7.25,75,7.57,90,7.76,110,8.23,120,8.48,135,8.3,150,7.56,177.2,7.098475

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.56	4.85	5.01	4.99	5.06	4.87	4.36	3.69
8	5.55	5.82	6.01	6.09	6.21	6.03	5.51	4.76
10	6.22	6.46	6.63	6.78	6.9	6.81	6.42	5.65
12	6.62	6.81	6.97	7.13	7.28	7.23	6.98	6.32
14	6.84	7.02	7.19	7.34	7.56	7.55	7.34	6.75
16	6.96	7.15	7.36	7.45	7.82	7.84	7.65	7.07
20	7.03	7.25	7.57	7.76	8.23	8.48	8.3	7.56

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	45°	2.94	144.8°	3.2
8	43.2°	3.66	146°	4.12
10	41.4°	4.19	146.2°	4.89
12	40.5°	4.57	146.9°	5.47
14	39.6°	4.78	149.2°	5.84
16	39.4°	4.88	172.1°	6.33
20	39.4°	4.93	177.2°	7.09

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°	4.56	5.55	6.22	6.62	6.84	6.96	7.03
60°	4.85	5.82	6.46	6.81	7.02	7.15	7.25
75°	5.01	6.01	6.63	6.97	7.19	7.36	7.57
90°	4.99	6.09	6.78	7.13	7.34	7.45	7.76
110°	5.06	6.21	6.90	7.28	7.56	7.82	8.23
120°	4.87	6.03	6.81	7.23	7.55	7.84	8.48
135°	4.36	5.51	6.42	6.98	7.34	7.65	8.30
150°	3.69	4.76	5.65	6.32	6.75	7.07	7.56