Sizwe
RSA MiuraSail number RSA/RSA1235
Stored record updated May 13, 2026 UTC.
GPH
733.3
OSN
708.3
LOA
9.33 m
Displacement
4779 kg
Triple-Number Ratings
Lower is fasterTriple Inshore
Low
0.553
Medium
0.7556
High
0.8796
Triple Offshore
Low
0.7067
Medium
0.9273
High
1.0433
Boat Specifications
Dimensions
- Length overall
- 9.33 m
- Beam
- 3.15 m
- Draft
- 1.78 m
- Displacement
- 4779 kg
- Crew weight
- 478 kg
- Wetted surface
- 22.33 m²
Sails
- Mainsail
- 20.04 m²
- Genoa
- 34.15 m²
- Spinnaker
- 69.14 m²
- Asymmetric spinnaker
- 0 m²
Design
- Type
- Miura
- Builder
- Nebe
- Designer
- Berke Meyer
- Year built
- 1991
- Stability index
- 111.1
Performance data
Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into Offwind or compatible navigation software.
| Wind Speed | 52° | 60° | 75° | 90° | 110° | 120° | 135° | 150° |
|---|---|---|---|---|---|---|---|---|
| 6 | 4.44 | 4.66 | 4.78 | 4.68 | 4.73 | 4.59 | 4.14 | 3.56 |
| 8 | 5.23 | 5.44 | 5.58 | 5.55 | 5.71 | 5.58 | 5.13 | 4.53 |
| 10 | 5.77 | 5.96 | 6.11 | 6.18 | 6.34 | 6.26 | 5.94 | 5.37 |
| 12 | 6.1 | 6.27 | 6.42 | 6.51 | 6.7 | 6.67 | 6.45 | 6.04 |
| 14 | 6.29 | 6.45 | 6.63 | 6.68 | 6.96 | 6.97 | 6.79 | 6.47 |
| 16 | 6.38 | 6.56 | 6.78 | 6.87 | 7.18 | 7.24 | 7.09 | 6.79 |
| 20 | 6.46 | 6.65 | 6.95 | 7.15 | 7.46 | 7.7 | 7.69 | 7.35 |
| Wind Speed | Beat Angle | Beat VMG | Run Angle | Run VMG |
|---|---|---|---|---|
| 6 | 43° | 2.92 | 147.5° | 3.08 |
| 8 | 41.4° | 3.52 | 151.4° | 3.93 |
| 10 | 40.5° | 3.95 | 153.2° | 4.66 |
| 12 | 39.6° | 4.25 | 159.2° | 5.32 |
| 14 | 39.6° | 4.4 | 171.2° | 5.88 |
| 16 | 39.3° | 4.48 | 177.2° | 6.33 |
| 20 | 38.8° | 4.55 | 179° | 6.92 |
VPP POLAR · BOAT SPEED BY TWAKT
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
| 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° | 4.44 | 5.23 | 5.77 | 6.10 | 6.29 | 6.38 | 6.46 |
| 60° | 4.66 | 5.44 | 5.96 | 6.27 | 6.45 | 6.56 | 6.65 |
| 75° | 4.78 | 5.58 | 6.11 | 6.42 | 6.63 | 6.78 | 6.95 |
| 90° | 4.68 | 5.55 | 6.18 | 6.51 | 6.68 | 6.87 | 7.15 |
| 110° | 4.73 | 5.71 | 6.34 | 6.70 | 6.96 | 7.18 | 7.46 |
| 120° | 4.59 | 5.58 | 6.26 | 6.67 | 6.97 | 7.24 | 7.70 |
| 135° | 4.14 | 5.13 | 5.94 | 6.45 | 6.79 | 7.09 | 7.69 |
| 150° | 3.56 | 4.53 | 5.37 | 6.04 | 6.47 | 6.79 | 7.35 |