[Rhodes22-list] anchoring

[Michael D. Weisner]

Ben,

Be careful about trying to estimate the angle the rode makes underwater, 
especially in the Caribbean.  Due to the change in the index of refraction 
(bending at the water line), the visual observations about the line above 
and below the water may be incorrect.

That said, I was always taught that the chain helped to set the anchor, 
allowing the flukes to dig in at a steep angle as the anchor is dragged 
during the set process.  Once the anchor catches, the rode lifts the chain, 
dependent on the scope (depth, distance, length, etc.)  The angle must be 
maintained (additional rode may need to be released) to continue to hold as 
conditions change (tide rises) since the anchor is designed to release as 
the angle approaches 90 degrees (sail over the anchor.)

Mike
s/v Shanghai'd Summer ('81)
Nissequogue River, NY

From: "ben" <benonvelvetelvis at theskinnyonbenny.com>Sent: Tuesday, September 
16, 2008 10:43 AM
> << The chain portion of the rode does not change the angle of pull.>>
>
> Of course it does.  Unless your boat is being pushed by a very strong wind
> or current, and assuming you've let out enough rode, the chain is lying 
> very
> close to the bottom.  The entire rode arcs up to the boat in a parabola --
> not in a taut straight line.
>
> If you charter in the Caribbean, it's easy to see first hand in the clear
> water.  \\
>
> Ben S
> Velvet Elvis
>
>
> -----Original Message-----
> From: rhodes22-list-bounces at rhodes22.org
> [mailto:rhodes22-list-bounces at rhodes22.org] On Behalf Of Bill Effros
> Sent: Tuesday, September 16, 2008 8:53 AM
> To: The Rhodes 22 Email List
> Subject: Re: [Rhodes22-list] anchoring
>
> Joe,
>
> Don't know if you saw my rants regarding Practical Sailor and anchors.
> In a nutshell, I don't think they know what they are talking about.
>
> They test anchors using a winch mounted on the shore and dragging
> anchors through the same loosened mud over and over.  This is not the
> way an anchor should be set.  The tests favor the anchors first pulled
> through the mud, and heavy plow type anchors pulled through
> subsequently.  All the anchors were not the same weight.
>
> The chain portion of the rode does not change the angle of pull.
> Whether the rode is rope or chain, it is pulled taut -- the angle is
> determined by other factors you set, primarily the length of the rode
> between the boat and the anchor.
>
> Bill Effros
>
>
>
> Joe Babb wrote:
>> Elle,
>> Sounds like Slim's got the answer.   He has experience with the Delta
>> and says it is good in weeds.  As far as anchor rode goes, I'm gonna
>> stick with a short length of chain between anchor and nylon because the
>> chain helps hold the anchor at a good angle to dig in.  Lots of tests by
>> folks like Practical Sailor magazine back that up.  That's usually what
>> a kellet is used for if you have to anchor with short scope, to hold the
>> anchor at a better angle.
>> Best,
>> Joe
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