Posted: Jun 07, 2011 - 09:14 PM
There are a couple of things you can be referring to. Lashing blocks are normally just blocks that are attached using a dyneema loop instead of a metal shacke. I have a few on my boat, they just replace any non-cleated block you may use, like bullet blocks.
The other is a multi purchase low friction system with no moving parts. Those are mostly used on the big boats to give high purchase adjustment to shrouds, forestays and backstays similar to the discussion of a Portuguese turnbuckle in one of the other active threads. Unless you are going to an all high tech line rigging system there is likely no advantage to going to lashing blocks and web tie sheaves on a beachcat.
You can use them but realize you have to do a lot more inspection and maintenance because the lines will degrade and fray much faster than standard aluminum ball bearing blocks.
--
Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
--