---
product_id: 775078545
title: "(Yellow) - Optimum Time Series 3 Sailing Timer"
brand: "optimum time"
price: "A$27478"
currency: AUD
in_stock: true
url: https://www.desertcart.com.au/products/775078545-yellow-optimum-time-series-3-sailing-timer
store_origin: AU
region: Australia
---

# Water resistant up to 5 ATM 38mm x 20mm ultra-clear display Pre-programmed 5,4,1,0 ISAF start sequence (Yellow) - Optimum Time Series 3 Sailing Timer

**Brand:** optimum time
**Price:** A$27478
**Availability:** ✅ In Stock

## Summary

> ⏳ Own the start line with precision and style!

## Quick Answers

- **What is this?** (Yellow) - Optimum Time Series 3 Sailing Timer by optimum time
- **How much does it cost?** A$27478 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/775078545-yellow-optimum-time-series-3-sailing-timer)

## Best For

- optimum time enthusiasts

## Why This Product

- Trusted optimum time brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sync Like a Pro:** Instantly sync countdown with race control using dedicated buttons—never miss the start gun again.
- • **Multi-Mode Timing:** Countdown, repeat, and count-up modes cover every race scenario with audible or mute alarms.
- • **Race-Ready Visibility:** Large 16mm digits and adjustable viewing angle ensure you never miss a crucial second.
- • **Versatile Mounting Options:** Wear it on your wrist, sleeve, or mount it on boom/mast with included bracket for ultimate convenience.
- • **Built to Brave the Elements:** Shock resistant ABS case and 5 ATM water resistance keep your timer ticking through any weather.

## Overview

The Optimum Time Series 3 Sailing Timer is a robust, professional-grade countdown timer designed specifically for competitive sailors. Featuring a large, easy-to-read 38mm x 20mm display with 16mm digits, it offers pre-programmed ISAF start sequences and sync buttons to align perfectly with race control. Its shock-resistant ABS case and 5 ATM water resistance ensure durability in harsh marine environments. Versatile mounting options include wrist, sleeve, or boom/mast bracket, making it the ultimate sailing companion for millennial pros who demand precision and reliability.

## Description

The original and iconic large yellow timer is still the best choice for today's competitors worldwide. If you need a robust timer with easy-to-read display and exceptional sailing capabilities, this is the perfect choice. The OS3 straps to the mast or can be worn comfortably over the sailing kit. The face rotates for optimal viewing angle. The large button makes it easy to fumble when the race begins. The OS3 also features essential synchronous buttons that allow you to sync countdown to the race control timer so you never miss a firearm. Details: 65mm diameter ABS case 38mm x 20mm display. Single Row Display 16mm digit height Adjustable viewing angle Boom/Mast Mount Bracket Included Adjustable elastic straps. Water resistant to 5 ATM. Shock Resistant Electroluminescent backlight Timer function: Normal timekeeping mode (12 hours or 24 hours), pre-programmed 5 4 1 0 ISAF Alarm sounds at start sequence or 5 minutes minimum and 1 minute program (mute if needed). Countdown & Repeat or Countdown and Up Sync buttons allow you to instantly sync when you miss a firearm. Count up from zero

## Features

- 38mm x 20mm display size Single row display. Large 16mm digit height Adjustable Viewing Angle
- 5,4,1,0 ISAF start sequence Pre-programmed to hear warning signal (mute if needed)
- Boom/Mast Mount Bracket Included Elastic straps that can be worn over wrist or sleeve
- Countdown repeat option or countdown and up to show elapsed time of handicap racing
- Large ABS case with 65mm overall Shock Resistant Water resistant to 5 ATM

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Optimum Time |
| Model Number | OS315 |
| Package Dimensions | 11.7 x 9.8 x 4.9 cm |
| Material | Acrylonitrile Butadiene Styrene |
| Color | yellow |
| Size | One Size |
| Special Features | Arabic Numerals |
| Power Source | Battery Powered |
| Battery Type | Silver Oxide |
| Lithium Battery Packaging | Batteries contained in equipment |
| Package Weight | 0.12 Kilograms |
| Batteries Required | No |
| Batteries Included | Yes |
| Brand Name | Optimum Time |
| Country of Origin | China |
| Item Weight | 0.22 Pounds |

## Product Details

- **Color:** Yellow
- **Brand:** Optimum Time
- **Material:** Plastic
- **Item Weight:** 0.22 Pounds
- **Number of settings:** 5

## Images

![(Yellow) - Optimum Time Series 3 Sailing Timer - Image 1](https://m.media-amazon.com/images/I/71DYWQL1O4L.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: does timer beep every minute**
A: In countdown mode it beeps every minute and during the last minute it beeps every 10 seconds. In the last 10 seconds it beeps each second with a long tone at zero.

**Q: Can the timer be set to 3 minutes ? ( or multiples of 1 minute..)**
A: Timer programmes are available in 5,4,1,0 followed by 5mins, 3mins,1min.

**Q: is there an option to mute the beeper while using countdown mode?**
A: Yes

**Q: Is the watch waterproof or water resistant?**
A: Yes, it is. Never used mine to dive, but works fine for sailing and kiting.

## Frequently Bought Together

- Optimum Time Series 3 Sailing Watch in Yellow - Water Resistant Race Timer for Sailing
- Optimist Racing: A Manual for sailors, parents & coaches (Sail to Win)
- Schaefer Little Hawk MK1 Wind Indicator f/Dinghies Up to 6M

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**Shop now:** [https://www.desertcart.com.au/products/775078545-yellow-optimum-time-series-3-sailing-timer](https://www.desertcart.com.au/products/775078545-yellow-optimum-time-series-3-sailing-timer)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-19*