SKU: 33049113203

Ronstan ClearStart 40mm Sailing Watch- Black [RF4054A]

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Ships within 48 hours · Estimated delivery Aug 15 - Aug 20

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Description

Ronstan ClearStart 40mm Sailing Watch- Black [RF4054A]ClearStart 40mm Sailing Watch Black Innovative Race Functions with Bold Styling The most popular sailing watch in the world just got better. Ronstan's Clear Start race timer and watches are completely updated with bold styling and true sailing functionality. Besides the fresh look 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

ClearStart™ 40mm Sailing Watch- Black

Innovative Race Functions with Bold Styling

The most popular sailing watch in the world just got better. Ronstan's Clear Start™ race timer and watches are completely updated with bold styling and true sailing functionality. Besides the fresh look 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, Clear Start™ 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 Clear Start™.

Large Quick View Displays

The entire Clear Start™ range features oversized digit displays for easy viewing. The compact 40mm Sailing Watch has impressive 10mm (3/8”) digits. 

Race Sequence Resynchronisation

All racing sailors know how hard it can be to get the watch going at the exact second the start sequence is commenced. With the handy SYNC function, you can quickly resynchronise the Clear Start™ to the official race time. A simple press of a button allows you to drop down to the next minute, allowing you to get your starting sequence back in perfect SYNC at the next opportunity.

Pre-programmed Race Sequence Sounds

The intuitive Clear Start™ sound signals let you know exactly where you are in the start sequence without looking at the display. Pre-programmed with World Sailing 5-4-1-0 and match racing start sequences, it can also be programmed for other countdown sequences by the user. Sound signals can be turned off if desired.

End of Sequence - Countdown or Count Up

Depending on the user's preference, the watch can be set up to auto repeat the countdown at the end of the sequence for general recall restarts, or to start counting up to track elapsed time.

Multi-Line Display with Real Time

No need to switch between countdown and time modes because the actual time is displayed below the countdown time on the multi-line ClearStart™ display.

Daily Life Functionality

From waking up for work to working out, the Clear Start™ range is also great for everyday activities. Standard modes include 12 or 24 hour time format, date in day/month or month/day format, daily alarm and chronograph (stop watch).

Luminescent Backlight

Bright, full-face electroluminescent backlighting is easy to read at night and can be turned on temporarily for a quick view.

Water and Shock Resistant

Designed to survive the rigors of competitive sailing, ClearStart™ watches and timers are water resistant rated at 5ATM and highly shock resistant. Watch housings are moulded in rugged fiber reinforced resin, with a resilient and super-comfortable silicon band. 

Race Mode:

  • Multiple start sequence options – World Sailing 5,4,1,0, match racing, user set. 
  • SYNChronisation function – resynchronise 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)

Features:

  • 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:

  • Durable, ultra-clear mineral crystal lens. 
  • Comfortable and secure silicon band. 
  • Reinforced polycarbonate case. 
  • 40mm (1 9/16”) diameter face. 
  • Oversized 10mm (3/8”) digit display. 
  • Textured easy-find buttons. 
  • Stainless steel buckle with silicon band retainer. 
  • Stainless steel back. 
  • Weight 50g (1.8oz)
This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.

Specifications:

  • Type: Watches
  • Box Dimensions: 3"H x 3"W x 5"L WT: 0.2 lbs
  • UPC: 9316800585052

Brochure (pdf)
Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 33049113203

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4.3 ★★★★★
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Verified Purchase
Steve Hall
Louisville, US
★★★★★ 5
A Diabetic Traveler's Best Friend at the Hot Springs!
Size: 13-14 Women/12-13 Men, Color: Black-w001
I'll be honest — I bought these almost last minute before heading out on vacation to the Hot Springs in Carson City, Nevada. As someone with diabetes, I have to be really careful about my feet, especially on rough or hot concrete surfaces. Pool decks and spa areas can be brutal, and I've had too many close calls just walking around barefoot. I grabbed these water shoes almost as an afterthought, and they ended up being one of the best decisions of the whole trip. From the moment I slipped them on, I could tell they were going to do the job. They fit true to size — no awkward sizing guesswork — and they hugged my feet snugly without feeling restrictive or causing any pressure points (a big deal for me). The sole gave me just enough protection from the concrete and wet surfaces around the springs, and I never once felt like I was going to slip. That peace of mind alone was worth every penny. They're lightweight enough that I barely noticed I had them on, and they dried quickly after getting splashed or submerged. No heavy, waterlogged feeling dragging me down. I wore them in and out of the water all day and my feet felt totally fine — no soreness, no irritation, nothing. For someone managing diabetes, that's honestly huge. I genuinely have zero complaints. These delivered exactly what they promised and then some. Whether you're headed to a hot spring, a beach, a pool, or just doing some light water yoga, these are a solid buy. Hope this helps!
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Reviewed in the United States on May 14, 2026
M
Verified Purchase
Mark
Whiting, US
★★★★★ 5
Great water socks
Size: 8.5-9.5 Women/7.5-8.5 Men, Color: Shark Blue
Perfect! I’m autistic and this was the last piece of the puzzle for my sensory experience at the pool. They feel like wearing socks with hard soles on and are great for if you need to walk through gravel or anything. They don’t trap water much and the fabric is stretchy and comfortable. I liked the range of colors, I got the one with sharks. I wear a men’s size 8 shoe and I got the same size here, it was the correct size with a little extra room.
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Reviewed in the United States on May 27, 2026
A
Verified Purchase
Amazon Customer
Los Angeles, US
★★★★★ 4
Colorful, comfortable, durable water shoes
Size: 8.5-9.5 Women/7.5-8.5 Men, Color: Shark Blue, Size: 8.5-9.5 Women/7.5-8.5 Men, Color: Shark Blue
I have ordered 5 pairs of these water shoes. The quality is amazing the bottom is durable, the stitching feels strong, they are comfortable, slip resistant, fit true to size and look awesome! We ordered the paisley, the blue geo, galaxy, lightning (lightning was sent back as we received the wrong size) and sharks. Only reason they are getting a 4 star instead of 5 is because I would much rather have the cushion inside sewn in instead of it being like an insert but that is what I find to be most common with these type of shoes.
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Reviewed in the United States on April 29, 2026
S
Verified Purchase
Susan L.
Whiting, US
★★★★★ 5
Love these for beach foot protection!!
Size: 10-11 Women/9-10 Men, Color: Black-w001
These water shoes were perfect for our cruise to Grand Turk. The beach was a little rocky once in the water & the bottom of these shoes protected our feet and made it comfortable they dry quickly they are lightweight and easy to pack and carry in a beach bag. I bought two pair of the black one for me one for my husband, and he even wore them which was shocking into me and loved them.!!!! they don’t have walking support so they’re definitely something that you bring with you put on your feet before you enter like water where you can’t see the bottom or rocks/coral and they totally protect your foot on the bottom
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Reviewed in the United States on May 13, 2026
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Verified Purchase
TB
Birmingham, US
★★★★★ 3
I received someone else’s returned product
Size: 7-8 Women/6-7 Men, Color: Sunset
The inner product packaging was already cut open and not sealed, and there was debris inside the socks: clear indicators that the pair I received was someone else’s return. They also run big and are very wide in the toe area. My daughter’s pair also ran big, but at least hers were sealed. Overall quality is a bit flimsy, so we’ll see how long they last.
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Reviewed in the United States on May 31, 2026

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