Sailed with 135LP genoa and the Interrupt main. Backstay at 3.
Lovely day. Sailed out past Y"A". Immediately past, noticed that the boat was sailing itself to a certain extent. At 10-12kts apparent wind, 60* on the port bow, with the 135LP sheeted in for upwind sailing (about 4" off the spreader), and the main eased so that most of it was ineffective, the boat sailed itself for 0.9nm while varying course from 100* to 130*, mainly holding to 120*. See track.
Confirmed that it takes a full minute to tack and return to speed.
Current ebbing about 0.7kts at R"92".
GPX formatted track Distance: 6.8nm, estimated average speed: 4.2kts, estimated duration: 1:34