What You'll Need

  • Harken Lower Vang Assembly
  • 14ft (4.23m) 7/64 inch Samson Amsteel Blue Dyneema
  • 5ft (1.5m) of 7/64 inch Samson Amsteel Blue Dyneema
  • Plastic Vang Handle (Optional)
  • Double Block or Double Block with Single Becket
  • Curved Vang Key
  • Splicing Fid or Wire (alternatively tie bowline knots)

Rigging Steps

Put some packaging tape or rigging tape on the end on the cleated line and thread it through the harken lower assembly and out to the cleat
Splice the the uncleated cascade line (3mm Samson Amsteel Blue) onto the boom block and thread it through the lower assembly back around the boom block.
Attach the double block to the uncleated cascade line.

Thread the cleated line (5mm Samson Amsteel Blue) through the double block and lower vang assembly and tie a bowline where the line attaches (either the becket on the double block or the top pulley on the lower vang assembly)
Extend the vang so that the double block is touching the boom block, then mark the cleated line at the cleat, pull the line out slightly, and thread the line through the vang handle, tie a bowline to complete the handle loop and that's it.
The most important thing to have a smooth running vang is to make sure that none of the lines are twisted. It's also a good idea to upgrade to a bigger block than the oem double block single becket and oem 4mm cleated line to 5mm Samson Amsteel Blue. Taking out the last purcahse makes for a little less line hanging when you've got the vang on hard and lets you put the vang on just a little bit quicker for racing. The vang handle is also important because on a windy day you can shred the skin on your hands very quickly while adjusting the vang.

The use of single braid Samson Amsteel Dyneema (7/64") allows for the non-cleated line to be luggage tagged on to the blocks and for the cleated line to be spliced to the lower vang, cleanly taking out a purchase. (or becket block if you're using the full purchase power). I've found that it takes less effort to get the vang on as well as off around the windward mark. That extra second you get around the windward mark can translate into a few boat lengths on the racecourse.