Masthead Block

Ryan,

Using shackles instead of toggles allow the block to articulate from side to side. If the block were on a toggle, and the halyard pulled off to one side, it would chafe against the cheeks. Not a problem so much on the main as it is on either a jib or a spinnaker halyard.

Another point to consider is the use of a swivel. I have found that this can cause the line to twist around itself in a most annoying manner. Using a shackle allows the block to align with the strain, and the swivel is not necessary. Any time you can reduce the complexity of the the gear aloft, its worth a bit of effort.

Make sure that the block is adequately sized for the line, and be generous here, your halyards will thank you. On the other hand, I also like to use a block with a becket for at least one halyard. Two reasons for this, it provides just a little additional insurance for when you have to work aloft. Should the axle fail, the becket will trap the halyard, and this might just prevent that ugly sinking sensation.. The becket gives you someplace to tie stuff when working aloft too. Along these same lines, the block chosen should be the best and most reliable available. And mouse the shackle!

John