Yes. If you're going to splurge for the data options on the Forerunner 945 you should use a chest strap to enable all features, ensure accuracy of device.What's the difference between the Forerunner 945 and 245. The 245 is primarily a running watch. The forerunner 945 is a triathlon watch. 2022 Green Bay Triathlon & Duathlon - Cancelled. Sun, May 29, 2022. Green Bay, Wisconsin (Ashwaubomay Park) Olympic Triathlon : Triathlon : Swim 800 Meters, Bike 20.7 Miles, Run 5 Miles. Sprint Triathlon : Triathlon : Swim 400 Meters, Bike 10 Miles, Run 3.1 Miles. Sprint Duathlon :. Once you enter your start point and destination the route finder will map out the best routes for your journey, giving you an estimation of time and an accurate mileage count. It's easy to add waypoints, so if you know you need to take a detour en route then you don't need to workout separate journeys. The route planner will give you a list.