How do I size a block for my sailboat?

Match the block to the line diameter it will carry and to the working and breaking loads of the system (sheet, halyard, control line). Makers publish load ratings and line-size ranges — choose a block whose working load comfortably exceeds the real-world load, without going so large it adds needless weight.

What is running rigging?

Running rigging is the moving lines that control the sails — sheets, halyards, and control lines — as opposed to standing rigging (the fixed wire that holds up the mast). Running rigging should be matched to the boat’s blocks, clutches, and winches for smooth, reliable sail handling.

How do I maintain sailboat winches and hardware?

Rinse with fresh water after sailing, keep sheaves and bearings clean, and periodically service winches (disassemble, clean, and re-grease per the maker’s instructions). Marine-grade stainless and good maintenance keep hardware working smoothly when loads are high and timing matters.

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Ronstan

Ronstan RF4055 ClearStart™ 50mm Sailing Watch - Black/Grey

Manufacturer: RonstanPart #: RF4055ASKU: 71061

150 ft

$101.96$119.95Save $17.99 (15%)Ships when available

Item #: 71061

Category: Accessories

Currently out of stock. This item isn't available to order right now — check back soon or contact us for availability.

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Description

RF4055 ClearStart™ 50mm Sailing Watch - Black/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 wil

Specifications

Brand	Ronstan
Part Number	RF4055A
EverTide SKU	71061
UPC	9316800574605
Cable Length	150 ft

Specifications are provided by the manufacturer. Confirm fitment for your application before ordering, or contact us and we'll help.

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Returns & warranty

Returns are accepted within 30 dayson items that are unused and in their original packaging. Some items may be subject to a manufacturer restocking fee. Special-order items may not be eligible — if you're unsure, ask us before ordering.

Ronstan productscarry the manufacturer's standard warranty. For a warranty claim or a return authorization, see our full returns policy or contact us.

Sailing — frequently asked

How do I size a block for my sailboat?: Match the block to the line diameter it will carry and to the working and breaking loads of the system (sheet, halyard, control line). Makers publish load ratings and line-size ranges — choose a block whose working load comfortably exceeds the real-world load, without going so large it adds needless weight.
What is running rigging?: Running rigging is the moving lines that control the sails — sheets, halyards, and control lines — as opposed to standing rigging (the fixed wire that holds up the mast). Running rigging should be matched to the boat’s blocks, clutches, and winches for smooth, reliable sail handling.
How do I maintain sailboat winches and hardware?: Rinse with fresh water after sailing, keep sheaves and bearings clean, and periodically service winches (disassemble, clean, and re-grease per the maker’s instructions). Marine-grade stainless and good maintenance keep hardware working smoothly when loads are high and timing matters.

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