The Perils of Rafting On - Page 4 - SailNet Community
 7Likes
Reply
 
LinkBack Thread Tools
post #31 of 34 Old 08-30-2013
Closet Powerboater
 
MedSailor's Avatar
 
Join Date: Mar 2008
Location: Anacortes PNW
Posts: 3,577
Thanks: 258
Thanked 111 Times in 100 Posts
Rep Power: 8
 
Re: The Perils of Rafting On

Quote:
Originally Posted by JonEisberg View Post
No doubt many instances of dragging are due to insufficient scope, but I think the argument can also me made that many cruisers often use more scope than necessary, with no added benefit whatsoever... A lot of recent analysis and real-world experience is leaning towards the conclusion that the generally accepted safe minimum of 7:1 is largely a myth...

Peter Smith of Rocna, with help from the work of Alain Fraysee, has demonstrated there is never any point in going with more than 7 or 8:1... Unless it makes one 'feel better', of course :-)

Beth Leonard & Evans Starzinger consider 3:1 or 4:1 to be their "normal" amount of scope, but will go to 5:1 if expecting a blow...

I believe they have the right approach, using an oversized hook that holds well to short scope to begin with, instead of depending on additional scope alone for holding power... Like Steve Dashew, they believe a cruising boat's main anchor should be sized on the assumption that they might have to be used with 3:1 scope, and I think that recommendation is spot on. In crowded anchorages, I think more drama is due to undersized anchors to begin with, than to 'insufficient scope'...
I would agree with much of this, though you're really well outside of "anchoring 101" or even 201 here. I usually don't like to mention this kind of stuff unless a lot of qualifications and specifics are mentioned. It's too easy, in my opinion, for someone to mis-read this info and start using 3:1 with rope and a regular sized anchor, for example, which none of the experts you mentioned are recommending.

Even with a pure rope rode there is no benefit to >7:1? Do you have a link to their data? I love anchor geekery.

MedSailor

I have a sauna on my boat, therefore I win.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MedSailor is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #32 of 34 Old 08-30-2013
Member
 
Join Date: Mar 2008
Posts: 89
Thanks: 33
Thanked 4 Times in 3 Posts
Rep Power: 8
 
Re: The Perils of Rafting On

Quote:
Originally Posted by MedSailor View Post
I would agree with much of this, though you're really well outside of "anchoring 101" or even 201 here. I usually don't like to mention this kind of stuff unless a lot of qualifications and specifics are mentioned. It's too easy, in my opinion, for someone to mis-read this info and start using 3:1 with rope and a regular sized anchor, for example, which none of the experts you mentioned are recommending.

Even with a pure rope rode there is no benefit to >7:1? Do you have a link to their data? I love anchor geekery.

MedSailor
Try this one. Highlight the variable you wish to change and click and move up or down (took me a while to figure that out)


Fun to play with, but I still like to be able to raise the wind and leave some chain on the bottom.


'

Last edited by lowtide; 08-30-2013 at 07:03 PM.
lowtide is offline  
Quote Quick Reply Share with Facebook
post #33 of 34 Old 08-31-2013
Senior Member
 
Join Date: Dec 2010
Posts: 4,784
Thanks: 1
Thanked 200 Times in 165 Posts
Rep Power: 5
 
Re: The Perils of Rafting On

Quote:
Originally Posted by MedSailor View Post
I would agree with much of this, though you're really well outside of "anchoring 101" or even 201 here. I usually don't like to mention this kind of stuff unless a lot of qualifications and specifics are mentioned. It's too easy, in my opinion, for someone to mis-read this info and start using 3:1 with rope and a regular sized anchor, for example, which none of the experts you mentioned are recommending.

Even with a pure rope rode there is no benefit to >7:1? Do you have a link to their data? I love anchor geekery.

MedSailor
Rocna's 'Knowledge Base' offers a wealth of information, backed by extensive experience with anchoring in some of the most hostile conditions on the planet...

Catenary & Scope In Anchor Rode: Anchor Systems For Small Boats
JonEisberg is offline  
Quote Quick Reply Share with Facebook
post #34 of 34 Old 09-01-2013 Thread Starter
Senior Member
 
flandria's Avatar
 
Join Date: Jul 2012
Location: Beautiful Georgian Bay, Canada
Posts: 182
Thanks: 9
Thanked 9 Times in 8 Posts
Rep Power: 4
 
Send a message via Skype™ to flandria
Re: The Perils of Rafting On

I notice that a lot of the discussion has shifted to scope etc... The 2 boats "in trouble" did not drag... they were simple beating the sh@# out of each other in a squall with a nasty little chop... and not a skipper on board who knew what to do (such as, break the raft...)
flandria is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Perils of a Pleasure Boat Insurance. DonQuijotedelMar General Discussion (sailing related) 4 07-12-2007 11:03 PM
I THINK Rafting Up is Allowed, though if its bumpy you may not want NewsReader Mass Bay Sailors 0 08-14-2006 07:15 PM
The Particulars of Rafting Up Mark Matthews Learning to Sail Articles 0 06-09-2003 08:00 PM
The Perils of Piracy Mark Matthews Seamanship Articles 0 07-15-2001 08:00 PM
Offshore Perils John Rousmaniere Seamanship Articles 0 06-07-2001 08:00 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome