Telltale$
This J/122E scene was captured by a Garmin VIRB XE with marine G-Metrix provided by an onboard Garmin marine electronics network. The J/122E is equipped with 3x GNX 120 on the mast, 2x GNX 120 and 1x GMI 20 above the companionway and a GPSMAP 7410 at the helm. There is a gWind Race at the the top of the mast and a GST 43 transducer in the hull for boat speed.
It's a good illustration of the interactive relationship between heading, true wind, apparent wind, and boat speed.
/fl