Emma - NOR15902

Sailing performance analysis for a Seascape 18 from 2009, built by ISSA and designed by Manuard.

Compare with another boat

5.56

Length (LOA)

meters

2.38

Beam

meters

1.5

Draft

meters

500

Displacement

kilograms

Total Sail Area

square meters

Data provided by the Offshore Racing Congress (ORC)

Sailing performance as a polar diagram

A polar diagram shows boat speed at different wind angles and wind speeds. The distance from center represents boat speed in knots, and the angle represents the boats angle to the wind. The wind speed is shown as true wind speed (TWS), not apparent wind speed. Likewise, the wind angle is shown as true wind angle (TWA), not apparent wind angle.

Beat: Sailing upwind (toward the wind)

Beam Reach: Sailing across the wind

Run: Sailing downwind (away from the wind)

Wind Speed

6kt

8kt

10kt

12kt

14kt

16kt

20kt

24kt

VMG Performance

Wind Speed (columns): True wind speed (TWS) in knots - the actual wind speed, not the apparent wind you feel on deck.

VMG (Velocity Made Good) is your effective speed toward your destination, not your actual boat speed.

Beat VMG (top bars): Speed made good when sailing upwind. Higher is better - it means you're reaching the windward mark faster.

Run VMG (bottom bars): Speed made good when sailing downwind. Higher is better - it means you're reaching the leeward mark faster.

6 kt

2.98

3.19

8 kt

3.58

4.00

10 kt

3.99

4.62

12 kt

4.20

5.13

14 kt

4.27

5.66

16 kt

4.33

6.33

20 kt

4.40

8.75

24 kt

4.39

11.41

⛵

Identity

NameEmma

Sail #NOR15902

CountryNOR

BuilderISSA

DesignerManuard

Build Year2,009

Series Year—

📏

Dimensions

LOA5.56m

Beam2.38m

Draft1.5m

Disp.500kg

WS8.61m²

Crew250kg

⛵

Sail Areas

Genoa8.56m²

Main15.35m²

Spinnaker0m²

A-Spin32.64m²

Total23.9m²

🏆

ORC Rating

GPH722

OSN698.5

Triple Offshore

Light

0.72

Medium

0.9327

Heavy

1.1106

Triple Inshore

Light

0.566

Medium

0.7462

Heavy

0.8852

📈

Rated boat speeds

Wind angle (TWA)

	Wind Speed (TWS)
	6 kt	8 kt	10 kt	12 kt	14 kt	16 kt	20 kt	24 kt
Beat VMG	2.98	3.58	3.99	4.20	4.27	4.33	4.40	4.39
52°	4.45	5.21	5.63	5.92	6.07	6.19	6.36	6.44
60°	4.64	5.37	5.79	6.17	6.38	6.53	6.77	6.90
75°	4.75	5.46	5.96	6.45	6.88	7.15	7.57	7.82
90°	4.86	5.67	6.25	6.60	7.14	7.70	8.47	9.05
110°	4.90	5.76	6.51	7.30	7.91	8.39	9.48	11.31
120°	4.73	5.64	6.38	7.26	8.18	9.13	10.78	12.32
135°	4.29	5.25	5.97	6.68	7.57	8.54	12.25	14.16
150°	3.68	4.62	5.34	5.92	6.53	7.31	10.10	13.18
Run VMG	3.19	4.00	4.62	5.13	5.66	6.33	8.75	11.41

Boat speed (knots) at wind angle / wind speed