---
product_id: 61326933
title: "Sailing Watch OS11 Sailing Watch"
brand: "optimum time"
price: "฿6958"
currency: THB
in_stock: true
reviews_count: 13
category: "Optimum Time"
url: https://www.desertcart.co.th/products/61326933-sailing-watch-os11-sailing-watch
store_origin: TH
region: Thailand
---

# Water-resistant to 5 ATM Long-lasting battery powered quartz Pre-programmed race countdowns Sailing Watch OS11 Sailing Watch

**Brand:** optimum time
**Price:** ฿6958
**Availability:** ✅ In Stock

## Summary

> ⏱️ Master the race, own the moment with Optimum Time OS11!

## Quick Answers

- **What is this?** Sailing Watch OS11 Sailing Watch by optimum time
- **How much does it cost?** ฿6958 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/61326933-sailing-watch-os11-sailing-watch)

## 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

- • **Clear Visibility:** Electro-luminescent backlight and large 10mm digits for quick glances.
- • **Rugged Durability:** Shock-resistant ABS case with stainless steel buckle built to endure.
- • **All-Day Wearability:** Compact 26mm display fits comfortably on and off the water.
- • **Precision Race Timing:** Sync your countdown instantly with race control for flawless starts.
- • **Versatile Alarm & Calendar:** Stay on schedule with multi-mode alarms and date functions.

## Overview

The Optimum Time OS11 Sailing Watch is a sleek, durable digital timepiece designed for novice sailors and professionals alike. Featuring a 26mm shock-resistant ABS case, water resistance up to 5 ATM, and pre-programmed ISAF race countdowns with an instant sync button, it ensures you never miss a start. Its compact size and electro-luminescent backlight make it equally stylish and functional on land, while the robust stainless steel buckle and rubber strap offer lasting comfort and reliability.

## Description

The Series 11 race timer is perfect for novice sailors looking for both functionality and wearability. Its smaller display size makes it perfect for also wearing on land. It boasts all the necessary timing functions alongside our essential sync button which synchronises your countdown to the race control timer ensuring you won’t miss the gun. FEATURES ABS case with integrated soft-touch PU strap Heavy-duty stainless steel buckle 26mm diameter display size Single row display with 10mm digit height Water-resistant to 5 ATM Shock-resistant construction Calendar function (date/month or month/date) Alarm function 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: Race officer,s dream watch - This is a dream watch it not only works as a normal watch,but it's a brilliant race officer and sailor watch,I can't fault it 👏
Review: Utterly Useless When Wet - I'm going to start with the positives. The pre-programmed countdown function works really well, the moulded rubbery strap isn't the worst in the world and not uncomfortable, but has the potential to break off once its aged a bit... However, it'll never age because the watch will give up long before the strap decides it can't cope anymore. As the title suggests, this watch is useless when it gets wet, a bit of a problem for a watch advertised as a sailing watch. If you never plan on going afloat, but need a watch with a decent display and countdown function, then you'll be fine; however, at the first sign of a wave, the screen fogged up and some of the digits stopped displaying. After two days of careful drying out, the fog cleared to leave no digits displaying at all. It was dead. I have given this 1 star, as I simply couldn't give any less. This is a hopeless watch for those who sail on water. It may be better suited to radio sailors or land-yachters, but if you plan on actually getting wet buy a Casio or Timex instead, you're money will be much better spent!

## Features

- Waterproof
- Water Resistant
- Alarm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00GAW8L4O |
| Age Range Description | Adult |
| Band Colour | Green |
| Band Material Type | Acrylonitrile Butadiene Styrene, Polyurethane, Stainless Steel |
| Band Width | 26 Millimetres |
| Brand Name | Optimum Time |
| Case Diameter | 26 Millimetres |
| Case Material Type | Stainless Steel |
| Case Thickness | 10 Millimetres |
| Character | Fashion |
| Clasp Type | Lobster Claw Clasp |
| Closure Type | Buckle |
| Country Of Origin | China |
| Crystal | Acrylic |
| Customer Reviews | 3.3 out of 5 stars 71 Reviews |
| Dial Color | green |
| Display | Digital |
| Embellishment Feature | Stud |
| Face Style | Modern |
| Global Trade Identification Number | 05060269670685 |
| Item Shape | Tonneau |
| Manufacturer | Optimum Time |
| Manufacturer Part Number | OS1128 |
| Model Name | Os1128 |
| Model Number | OS1128 |
| Power Source | Battery Powered |
| Special Features | Alarm, Water Resistant, Waterproof |
| Sport Type | Running |
| Strap Type | Rubber strap |
| Style Name | Strap. |
| Watch Movement Type | Quartz |
| Water Resistance Depth | 50 Metres |

## Images

![Sailing Watch OS11 Sailing Watch - Image 1](https://m.media-amazon.com/images/I/61vanUlU6TL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Race officer,s dream watch
*by D***I on 5 September 2021*

This is a dream watch it not only works as a normal watch,but it's a brilliant race officer and sailor watch,I can't fault it 👏

### ⭐ Utterly Useless When Wet
*by R***R on 23 August 2013*

I'm going to start with the positives. The pre-programmed countdown function works really well, the moulded rubbery strap isn't the worst in the world and not uncomfortable, but has the potential to break off once its aged a bit... However, it'll never age because the watch will give up long before the strap decides it can't cope anymore. As the title suggests, this watch is useless when it gets wet, a bit of a problem for a watch advertised as a sailing watch. If you never plan on going afloat, but need a watch with a decent display and countdown function, then you'll be fine; however, at the first sign of a wave, the screen fogged up and some of the digits stopped displaying. After two days of careful drying out, the fog cleared to leave no digits displaying at all. It was dead. I have given this 1 star, as I simply couldn't give any less. This is a hopeless watch for those who sail on water. It may be better suited to radio sailors or land-yachters, but if you plan on actually getting wet buy a Casio or Timex instead, you're money will be much better spent!

### ⭐⭐⭐⭐ Adequate functionality
*by A***R on 30 June 2026*

Basic, but adequate functionality. Less ostentatious than some alternatives.

## Frequently Bought Together

- Optimum Time Sailing Watch OS11 Sailing Watch
- LITTLE HAWK MK2 APPARENT WIND INDICATOR (for Dinghies up to 6m) - mounts at front of mast at gooseneck height
- The Rules in Practice 2025-2028: The Guide to the Rules of Sailing Around the Racecourse

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.th/products/61326933-sailing-watch-os11-sailing-watch](https://www.desertcart.co.th/products/61326933-sailing-watch-os11-sailing-watch)

---

*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-08-04*