The Kestrel 4500 addresses wind direction along with wind speed. This model includes a digital compass and calculates headwind / tailwind and crosswind by referencing a user set target direction. All this directional information and the other environmental readings are stored in the built-in 1400 data point memory. Add the 4500 Vane Mount and this Weather Tracker becomes a data-logging weather station which rotates in the slightest breeze.
Mini-Catalogs, Issue:03, Page:010
Sinclair, Issue:3B, Page:235