Optimum Series 3 Yellow Watch OS315
(otherwise known as the Big Yellow Watch or the Jumbo Watch)

Specialist Functions:

• 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 hr)
• 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 to each gun (can be silenced if preferred)
• 5 minute, 3 minute and multiples of 1 minute programs
• "Sync Button" for instant synchronisation if a gun is missed