Session 1

Sailing activity by Tim Attwell on 06.07.2026

Analytics & Coaching

Upwind speed

	Speed over ground [kn]	Velocity made good to windward (VMG) [kn]	Angle to the wind
Overall	2.71 kn	1.25 kn	62.08
Starboard tack	2.77 kn	1.75 kn	48.72
Port tack	2.64 kn	0.57 kn	75.15

Per leg

Leg	Time	Duration	Speed over ground [kn]	Velocity made good to windward (VMG) [kn]	Angle to the wind	Tacks
Upwind 1	10:29:39 – 10:33:19	00:03:40	2.37 kn	2.3 kn	32.17	1
Upwind 2	10:44:59 – 11:20:34	00:35:35	2.74 kn	1.14 kn	65.16	5

Hover or tap a leg in the table to see where it was sailed.

Tacking

During the upwind legs, 6 tacks were analysed.

Tack angle

The tack angle is the change in heading through a tack — the angle between the course sailed before and after the manoeuvre. A smaller angle means a tighter, more efficient tack that keeps the boat closer to the wind, while a larger angle indicates more heading was lost during the turn. The box shows the middle 50 % of tacks (Q1–Q3), the line marks the median, and the thin bar spans the full range. Comparing starboard-to-port and port-to-starboard can reveal whether tacking is consistently better on one gybe.