---
product_id: 18138575
title: "Series 3 Sailing Watch in Yellow - Water Resistant Race Timer for Sailing"
brand: "optimum time"
price: "139717CFA"
currency: XOF
in_stock: true
reviews_count: 8
category: "Optimum Time"
url: https://www.desertcart.sn/products/18138575-series-3-sailing-watch-in-yellow-water-resistant-race-timer
store_origin: SN
region: Senegal
---

# Water resistant up to 5 ATM (50 meters) Sync button for perfect race countdown alignment 16mm digit height for instant readability Series 3 Sailing Watch in Yellow - Water Resistant Race Timer for Sailing

**Brand:** optimum time
**Price:** 139717CFA
**Availability:** ✅ In Stock

## Summary

> ⏳ Own the start line with the iconic Big Yellow Timer!

## Quick Answers

- **What is this?** Series 3 Sailing Watch in Yellow - Water Resistant Race Timer for Sailing by optimum time
- **How much does it cost?** 139717CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/18138575-series-3-sailing-watch-in-yellow-water-resistant-race-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

- • **Race-Ready Visibility:** Massive 16mm digits ensure you never miss a second, even under bright sun or spray.
- • **Ultimate Sailing Sync:** Instantly synchronize your countdown with race control to nail every start perfectly.
- • **Versatile Mounting Options:** Wear it on your wrist or mount it on boom/mast with included bracket for hands-free timing.
- • **Built to Brave the Elements:** Shock-resistant ABS case and 5 ATM water resistance keep you racing no matter the conditions.
- • **Customizable Countdown Modes:** Pre-programmed ISAF start sequences with audible alerts—silence them or repeat countdowns as you like.

## Overview

The Optimum Time Series 3 Sailing Watch is a professional-grade race timer designed for competitive sailors. Featuring a large 38x20mm single-row display with 16mm digits, it offers exceptional readability even in challenging conditions. Its robust 65mm ABS case is shock-resistant and water-resistant up to 5 ATM, perfect for harsh marine environments. The watch includes pre-programmed ISAF start sequences with audible alerts and a unique sync button to align perfectly with race control. Versatile mounting options and an adjustable viewing angle make it the trusted choice for sailors worldwide.

## Description

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. THE DETAILS: 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

Review: Great Start Watch - I use the watch for kite foil racing. I love how big the numbers are so easy to read with sunglasses on while being sprayed with water, also I use reading glasses normally so the big display really helps. The buttons are big and easy to operate despite all the chaos going around me at the start. Plus the audible beeps in the final minute tell me when the start is without looking. This watch nails it. Pricey though.
Review: Battery dead, but great customer service. Made it right. - I have ordered this watch in white in the past and it is perfect. Have used it for years for dinghy racing with zero issues. I ordered this one (same watch in blue) for my son and the battery died on the second time worn, with very bad timing of this (out of town regatta). However, I followed up with the company and they made it all ok quickly. These things happen. Because my first watch (same exact watch, different color, same company) is so good, and because the company had great customer service, I am still giving 5 stars and will order again for sure. This watch must be the gold standard for dinghy racing. It is super easy to switch from 3 min starts to 5 min starts, do rolling starts, and toggle to time. I also love the sync function. It is interesting that the sailing watch (with sync function) is so much more expensive than the other equestrian version (with sec function). It seems it would be easy to order the wrong version accidentally.

## Features

- 38mm x 20mm display size. Single row display. Massive 16mm digit height. Adjustable viewing angle.
- 5,4,1,0 ISAF start sequence pre-programmed with audible warning signals (can be silenced if preferred).
- Boom/Mast Mount Bracket Supplied. Elasticated Strap for Wrist or over sleeve wearing.
- Countdown repeat option or Countdown and Up to show elapsed time for handicap races.
- Large 65mm overall ABS case. Shock Resistant Construction. Water Resistant to 5 ATM.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0058GEDSG |
| Additional Features | Glow In The Dark, Water Resistant |
| Age Range Description | Adult |
| Band Color | Yellow |
| Band Material Type | Plastic |
| Band Width | 20 Millimeters |
| Best Sellers Rank | #193,718 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #621 in Men's Wrist Watches |
| Brand | Optimum Time |
| Brand Name | Optimum Time |
| Case Diameter | 65 Millimeters |
| Case Material Type | Acrylonitrile Butadiene Styrene |
| Case Thickness | 16 Millimeters |
| Character | Fashion |
| Clasp Type | Tang Buckle |
| Closure Type | Buckle |
| Crystal | Plastic |
| Customer Reviews | 4.3 out of 5 stars 701 Reviews |
| Dial Color | Yellow |
| Display | Digital |
| Display Type | Digital |
| Embellishment Feature | Stud |
| Face Style | Sector |
| Global Trade Identification Number | 05060269670081 |
| Included Components | Elastic strap, Boom/mounting bracket for mat |
| Item Weight | 3.52 ounces |
| Manufacturer | Optimum Time |
| Manufacturer Part Number | OS315 |
| Model Name | OS315 |
| Model Number | OS315 |
| Power Source | Battery Powered |
| Shape | Round |
| Special Feature | Glow In The Dark, Water Resistant |
| Sport Type | Sailing |
| Strap Type | fabric strap |
| Style | Sport |
| Style Name | Sport |
| Theme | Sports |
| Unit Count | 1.0 Count |
| Watch Movement | Quartz |
| Watch Movement Type | Quartz |
| Water Resistance Depth | 50 Meters |
| Water Resistance Level | Water Resistant |

## Product Details

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

## Images

![Series 3 Sailing Watch in Yellow - Water Resistant Race Timer for Sailing - 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Start Watch
*by B***. on February 23, 2025*

I use the watch for kite foil racing. I love how big the numbers are so easy to read with sunglasses on while being sprayed with water, also I use reading glasses normally so the big display really helps. The buttons are big and easy to operate despite all the chaos going around me at the start. Plus the audible beeps in the final minute tell me when the start is without looking. This watch nails it. Pricey though.

### ⭐⭐⭐⭐⭐ Battery dead, but great customer service. Made it right.
*by C***S on September 9, 2024*

I have ordered this watch in white in the past and it is perfect. Have used it for years for dinghy racing with zero issues. I ordered this one (same watch in blue) for my son and the battery died on the second time worn, with very bad timing of this (out of town regatta). However, I followed up with the company and they made it all ok quickly. These things happen. Because my first watch (same exact watch, different color, same company) is so good, and because the company had great customer service, I am still giving 5 stars and will order again for sure. This watch must be the gold standard for dinghy racing. It is super easy to switch from 3 min starts to 5 min starts, do rolling starts, and toggle to time. I also love the sync function. It is interesting that the sailing watch (with sync function) is so much more expensive than the other equestrian version (with sec function). It seems it would be easy to order the wrong version accidentally.

### ⭐⭐⭐⭐⭐ Great Sailing Watch!
*by A***Y on August 24, 2023*

I ordered this watch in yellow and ordered another in blue. The yellow is for me — the blue for my husband. There was a short learning curve but once we mastered the buttons, the watch is perfect. We love the programmed countdown and cross the start line on the exact second. Love the colors! Love the large face! No malfunctions! Great watch!

## 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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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-06-19*