Tantivy: ORC Rating

GPH

658

OSN

640.6

LOA

7.5 m

Displacement

1114 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6329

Medium

0.8238

High

0.9435

Triple Offshore

Low

0.8091

Medium

1.0196

High

1.1585

Boat Specifications

Dimensions

Length overall: 7.5 m
Beam: 2.46 m
Draft: 1.71 m
Displacement: 1114 kg
Crew weight: 280 kg
Wetted surface: 13.24 m²

Sails

Mainsail: 21.52 m²
Genoa: 11.5 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 57.36 m²

Design

Type: Bull 7000
Builder: Topper UK
Designer: Young Yachtdesign
Year built: 1994
Stability index: 104.1

Performance data

Polar CSV

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

6,43,4.334428,52,4.84,60,5.11,75,5.3,90,5.54,110,5.69,120,5.6,135,5.12,142.3,4.764772,150,4.36
8,41.1,5.095789,52,5.7,60,5.92,75,6.09,90,6.28,110,6.55,120,6.51,135,6.19,147.8,5.54247,150,5.42
10,39.4,5.512896,52,6.16,60,6.36,75,6.55,90,6.59,110,7.14,120,7.24,135,6.91,150,6.23,154.1,6.036299
12,39,5.648874,52,6.33,60,6.59,75,6.96,90,7.07,110,7.54,120,7.87,135,7.7,150,6.91,157.4,6.531557
14,40,5.7699,52,6.41,60,6.71,75,7.21,90,7.54,110,7.92,120,8.4,135,8.65,150,7.61,155,7.304362
16,40.5,5.825835,52,6.45,60,6.79,75,7.37,90,7.92,110,8.28,120,8.89,135,9.66,147.8,8.697778,150,8.5
20,41.4,5.879129,52,6.5,60,6.87,75,7.53,90,8.32,110,9.01,120,9.9,135,11.77,144.1,12.110489,150,11.32

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	4.84	5.11	5.3	5.54	5.69	5.6	5.12	4.36
8	5.7	5.92	6.09	6.28	6.55	6.51	6.19	5.42
10	6.16	6.36	6.55	6.59	7.14	7.24	6.91	6.23
12	6.33	6.59	6.96	7.07	7.54	7.87	7.7	6.91
14	6.41	6.71	7.21	7.54	7.92	8.4	8.65	7.61
16	6.45	6.79	7.37	7.92	8.28	8.89	9.66	8.5
20	6.5	6.87	7.53	8.32	9.01	9.9	11.77	11.32

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.17	142.3°	3.77
8	41.1°	3.84	147.8°	4.69
10	39.4°	4.26	154.1°	5.43
12	39°	4.39	157.4°	6.03
14	40°	4.42	155°	6.62
16	40.5°	4.43	147.8°	7.36
20	41.4°	4.41	144.1°	9.81

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°	4.84	5.70	6.16	6.33	6.41	6.45	6.50
60°	5.11	5.92	6.36	6.59	6.71	6.79	6.87
75°	5.30	6.09	6.55	6.96	7.21	7.37	7.53
90°	5.54	6.28	6.59	7.07	7.54	7.92	8.32
110°	5.69	6.55	7.14	7.54	7.92	8.28	9.01
120°	5.60	6.51	7.24	7.87	8.40	8.89	9.90
135°	5.12	6.19	6.91	7.70	8.65	9.66	11.77
150°	4.36	5.42	6.23	6.91	7.61	8.50	11.32