. Approach S1 GPS Golf Watch. The Approach S1 is an innovative GPS golf watch that gives players precise. distances to the front, back and middle of greens. Approach S1 also measures individual shot distances, functions as a high-quality, everyday watch and it has an odometer to tell you how far you’ve travelled – on or off the course. Approach S1 comes preloaded with 14,000-plus U. S and Canadian courses so there’s no need for subscriptions or downloads. Features : . High sensitivity GPS receiver. Lock in yardages : S1 provides precise yardage to the front, back and middle of the green with one quick glance. Measures shot distance : Calculates precise yardage for shots played from anywhere on the course. No downloads, no subscriptions : S1 is packed with thousands of courses and is ready to use out of the box. Rechargeable lithium-ion battery – up to 3 weeks in watch mode, up to 8 hours in GPS mode. Easy-to-use everyday watch : S1 is designed for use as an every day watch