Suunto Spartan Sport User Guide - 2.6
Timers
Your watch includes a stopwatch and countdown timer for basic time measurement. From the watch face, open the launcher and scroll up until you see the timer icon. Tap the icon or press the middle button to open the timer display.
When you first enter the display, it shows the stopwatch. After that, it remembers whatever you used last, stopwatch or countdown timer.
Swipe up or press the lower button to open the Set timer shortcuts menu where you can change the timer settings.
Stopwatch
Start the stopwatch by pressing the middle button.
Stop the stopwatch by pressing the middle button. You can resume by pressing the middle button again. Reset by pressing the lower button.
Exit the timer by swiping right or keeping the middle button pressed.
Countdown timer
In the timer display, swipe up or press the lower button to open the shortcuts menu. From there you can select a pre-defined countdown time or create custom countdown time.
Stop and reset as needed wtih the middle and lower buttons.
Exit the timer by swiping right or keeping the middle button pressed.