The original and iconic ‘big yellow timer’ is still the top choice for competitors around the world today. If you need a robust timer, with an easy-to-read display, and exceptional sailing functionality, then this is the one for you. The OS3 can be strapped to a mast or comfortably worn over your sailing kit. The face rotates to give you the best viewing angle and the big buttons mean you won’t be left fumbling when the race is about to begin. The OS3 also features our essential sync button, which synchronises your countdown to the race control timer, ensuring you won’t miss the gun. Features • 65mm diameter ABS case • 38mm x 20mm display • Single row display with 16mm digit height • Adjustable viewing angle • Boom/mast mount bracket supplied • Adjustable elasticated strap • Water-resistant to 5 ATM • Shock Resistant Construction • Electro-luminescent backlight feature Timer Functions • Normal timekeeping mode (12 or 24 Hours) • Pre-programmed 5,4,1,0 ISAF start sequences or 5 min, 3 min, and 1 min programs with audible alarms (can be silenced if preferred) • Countdown & repeat or countdown and up • Sync button for instant synchronisation if a gun is missed • Count-up from zero