|Peter (35789km): |
Kalmus, Cape Cod. Wind decoupled just as we got to the beach, so slogged for 90 minutes until it picked up again. Lazy freestyle session, warm enough to fall a lot in a 2 mm wetsuit. Compared the GW-60 watch to 3 ublox 8 GPS units, including a Drotek NEO-M8N. Generally very good agreement (mostly within 0.1 knots, often 0.05). Accuracy estimates get a bit too optimistic for nautical mile and 1 hour, but that's nothing new. The error estimates on the u-blox 8 units was quite a bit lower than for the GW-60 (~ half; +- 0.1 kn for 10 secs vs. 0.2). No large obvious differences between the Drotek NEO-M8 (connected to a phone via USB) and the Beitian modules (connected to Openlog recorders), but I'll need to have a closer look.
|Alsosnoff (7715km): |
Seaside Park, NJ, US. South wind 14-18 knots. iSonic 107L., RB 7M., weed fin 32 cm.