"craigsmith via BoatKB.com" u22396@uwe wrote

For example a 10Kg Rocna, well set, may hold up to a tonne of force. This
is
realistic. Assume you have appropriate rode. The anchor will cope with
this,
assuming the pull angle is reasonably low.

Just wondered what type of rode would handle this force? On your site, you
recommend the 10Kg anchor for cruising boats up to about 30'. What would
teh corresponding chain/rode dimensions be to match teh anchor strength?

The Rocna anchor looks quite interesting and seems to be a good idea, at
least for some anchoring conditions.

A few comments:

1. Testing by pulling with a truck with little or no scope angle does not
really prove anything ( but is easier to film!)

- Would it not be better to do a comparison of the anchors with a larger
scope angle and typical rode/chain combinations. This may take a lot of
testing using a boat, a diver, undewater cameras etc, but as you said "Get
to the bottom of the theory, do your own research, get some experience, and
make your own decisions". Seems to me that pulling an anchor along a beach
with a truck is not the best way to make a scientific conclusion.

- What happens if the bottom is soft mud or weed as we often see in the
Great Lakes - Will the roll bar still work, or will it just sink in and not
roll? I would like to have seen some comparisons of anchors setting in less
ideal conditions.

- The part showing the difficulty of getting the anchor unstuck is not too
encouraging for those of us with bad backs

2. The web site does not give the size of the attachment slot for the
shackle. Can you fit a shackle that will take a 1 tonne working load through
the slot?

In our area, most boats seem to have a Bruce or knockoff - But, more
recently we see Delta or knockoffs. Nothing really works well in weed and
soft mud but weight helps. The knockoff Bruces are a cheap way of getting
weight, so I suspect that might be the driving force. In fact, I have just
added a 15Kg Bruce type because my 10Kg Delta just does not work that well
(10M, 5T cruising sail).

GBM