GPS3 Watch
Yes it has both a stopwatch and chronograph.
Navigate to MENU > TIMING to select the timer or chronograph.
There’s also a heat timer to keep track of surfing heats, simply select the duration of the heat and press SELECT when the heat begins.
GPS2 Watch
Navigate to MENU > TIMER > SET to HOUR: zero minutes and MINUTE: zero seconds (00:00), and press “START”.