Hoisting a sail with Seldén halyard tensioner

The Seldén Halyard tensioner reduces the number of halyards coiled at the mast or lead aft to the cockpit. It is ideal for sails that are permanently hoisted such as furling mainsails and headsails used on a jib furling system.  

The sail is hoisted with a messenger line fixed to the halyard until the halyard can be hooked on to the upper attachment point of the car. A temporary tail-line is then fitted to the lower point and lead back to a winch for final tensioning. The car will slide down the track and the pin-stop plunger will engage in the trimholes, one after the other, until a desired luff tension is achieved.

The tail line and the messenger line can both be stowed away until the sail is to be lowered

Learn how to use it:

https://support.seldenmast.com/files/1740390088/597-925-E.pdf

Safe working Load: 2000 kg
Breaking Load: 4000 kg
L: 738 mm
W: 40 mm
Fasteners: 11x M6