Ronstan RF4055 ClearStart™ 50mm Sailing Watch – Blue/Grey
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Ronstan RF4055 ClearStart™ 50mm Sailing Watch – Blue/Grey
Weight | 0.2 lbs |
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RF4055 ClearStart™ 50mm Sailing Watch – Blue/Grey
Innovative Race Functions with Bold Styling
Ronstan has taken the popular 50 mm (2″) size and features you love and added more durability, comfort, and ease of use to our design. Ronstan’s ClearStart™ race timer and watches combine contemporary styling with true sailing functionality. They feature large buttons, easy to read displays and advanced intuitive programming designed specifically with the racing sailor in mind. Developed with input from some of the world’s top sailors, ClearStart™ watches and timers are sure to set the standard for years to come. If you’re looking for a simple competitive edge, the difference is ClearStart™.
Features:
- Acrylic lens replaced by mineral crystal lens for improved clarity and durability
- Lens recessed in the case to improve impact resistance
- Glass-reinforced polycarbonate case now more durable
- A more flexible injection molded silicone band, which is more comfortable and more durable
- Lower profile and textured “easy-find” buttons
- Bold styling helps the 50mm ClearStart™ range stand out from the crowd
- Time, hours/minutes/seconds – 12 or 24 hour format
- Month/day or day/month format
- Daily alarm
- Chronograph – including hours and time of the day
- Luminescent backlight
- Battery saving mode – light can be turned off
- Shock resistant
Specifications:
- Time, hours/minutes/seconds – 12 or 24 hour format
- Month/day or day/month format
- Daily alarm
- Chronograph – including hours and time of the day
- Luminescent backlight
- Battery saving mode – light can be turned off
- Shock resistant
Race Mode:
- Multiple start sequence options – World Sailing 5,4,1,0, match racing, user set
- SYNChronization function – resynchronize if you start the countdown late
- Multi-line display – start sequence + time
- Loud intuitive countdown and start sound signals
- Countdown repeat, or count down and up (for elapsed race time)
- Separate fast access race and time mode scrolling
- Water resistant to 5 ATM (50m/150ft)
The RF4055 models will have the popular ClearStart™ race sequence functions, as well as daily-life functionality.
This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.


⚓ Smooth Sailing Shipping
Enjoy FREE standard shipping on most orders over $250 within the continental U.S. (excl. heavy/oversized/hazardous items).
We ship via UPS, FedEx, and USPS . Orders are processed in 1–2 business days with typical delivery in 1–5 business days .
🧭 Track The Voyage
You’ll receive tracking info by email once your order ships. If your package is marked “delivered” but not received, please wait 48 hours then reach out to our team.
🛟 Hassle-Free Returns & Exchanges
Returns accepted within 30 days of delivery. Items must be unused and in original packaging.
- Mistaken or damaged cargo? We’ll handle return shipping.
- Changed your course? Return shipping is on you.
- Report defects or damage within 7 days for a free exchange.
💰 Anchor Your Refund
Refunds go back to your original payment method within 5–7 business days after inspection.
📨 Contact the Crew
Questions about your order? Drop anchor at sales@marineelec.com .