Optimum Time Series 3 Big Sailing Watch - OS311 - Black Edition

OS311 Features

• Series 3 Black
• Plastic cased watch
• Elasticated strap
• 1 row LCD display
• Time of day
• Sailing functions with audible alarm
• 5,4,1,0 sequence or 5 min or 3 min or 1 min programs
• Countdown & repeat or Countdown and up
• Sync button for instant syncronisation if a gun is missed
• Count up from zero

OS310 Specifications

• Large 65mm overall ABS case
• 38mm x 20mm display size 
• Massive 16mm digit height 
• Single row display
• Adjustable Viewing Angle
• Boom/Mast Mount Bracket Supplied
• Elasticated Strap for Wrist or over sleeve wearing
• Water Resistant to 5 ATM
• Shock Resistant Construction
• Normal Timekeeping Mode (12 or 24 Hour)
• Specialist Sailing Timer Functions:
• Countdown repeat option or
• Countdown and Up to show elapsed time for handicap races
• 5,4,1,0 ISAF start sequence pre-programmed with audible warning signals (can be silenced if preferred)
• 5 minute, 3 minute and multiples of 1 minute programs as well
• Sync Button for instant synchronisation if a gun is missed