Jack Lines - SailNet Community
 11Likes
Reply
 
LinkBack Thread Tools
post #1 of 38 Old 05-07-2019 Thread Starter
Senior Member
 
SanderO's Avatar
 
Join Date: Jul 2007
Location: Northport, NY
Posts: 3,691
Thanks: 2
Thanked 94 Times in 94 Posts
Rep Power: 13
 
Jack Lines

My jack lines are heavy coat wire... attached to the bow cleat with a large shackle. They need to be cleaned but the are structurally sound...

I am thinking of replacing with webbing or high something else.

Would they be tied to the cleat?
What size and grade material?
Removed when not sailing?

Suggestions please.

pay attention... someone's life depends on it
SanderO is online now  
Sponsored Links
Advertisement
 
post #2 of 38 Old 05-07-2019
Senior Member
 
Join Date: Feb 2010
Location: Narragansett Bay
Posts: 20,193
Thanks: 82
Thanked 573 Times in 549 Posts
Rep Power: 11
   
Re: Jack Lines

Good upgrade. Hard to know if coated wire is corroded underneath. No shock absorption either.

I use commercial purpose made jacklines, made of webbing. Helps to twist them a couple of times, as you install, so they are easier to pick up and attach your tether. Lying wet and flat on the deck is hard to grab, especially if you are wearing gloves.

We tie ours to the stern and bow cleats, as well as a hard point on our coachroof, to keep the lines as far from the side as possible. I believe the number one trick is to keep the line/tether from allowing you to ever reach over the lifeline. We accomplish this along about 70% of the run and focus on those sections that have fewer handholds, such as the foredeck.

We only install them for passages that warrant it, in our opinion. Very rough weather or anytime overnight. I might leave them on for a week or two at a time, when I'm away, as I'm more inclined to take what Mother Nature dishes out. For weekends, I don't typically volunteer to head off in conditions I might need them for. If I were singlhanded, I'd leave them on permanently.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Jeanneau 54DS

In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
Minnewaska is offline  
post #3 of 38 Old 05-07-2019
Senior Member
 
pdqaltair's Avatar
 
Join Date: Nov 2008
Location: Deale, MD
Posts: 3,636
Thanks: 4
Thanked 127 Times in 125 Posts
Rep Power: 12
 
Re: Jack Lines

Jacklines. Jack lines are utility ropes used to last things down and the like. Different meaning.

The bow and stern cleats really are not the best locations, they are just convenient. In fact, it is better if the jacklines end 4-5 feet from the bow or stern so that you cannot go over (4-5 feet still allows you to stand) at the bow).

Material is a tough question, because there is no one answer. I've researched this, including impact testing, and published articles. Larger boats need higher strength and lower stretch than smaller boats. Webbing is nice, but if I can't leave them rigged because of UV, that makes them basically useless IMO (not there when I need them). I like covered Dyneema or oversized rope (if you can keep them out from underfoot--easy on multihulls, depends on the boat) because I can leave these rigged. There is nothing wrong with stainless cable, but I would skip the cover, go over strength (because they do not stretch), and make certain the tethers have some stretch (which is where you really need it anyway).

A few hardpoints at work stations (mast, helm) are good too.
MarkofSeaLife likes this.

Writing full-time since 2014
Author--Rigging Modern Anchors

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

"Keeping a Cruising Boat for Peanuts"
"Faster Cruising for the Coastal Sailor"
"Singlehanded Sailing for the Coastal Sailor"
pdqaltair is offline  
 
post #4 of 38 Old 05-07-2019
Senior Member
 
Join Date: Oct 2000
Location: Portland, OR
Posts: 1,130
Thanks: 4
Thanked 56 Times in 55 Posts
Rep Power: 20
 
Re: Jack Lines

Agree with pd....
we have pad eyes in the cockpit, at helm and just outside the companionway. Webbing jack lines that only see the sun for about a month a year. You do have to really tighten and retighten those lines after wetting and drying, and it takes some extra wraps when you make a 'cleat hitch' to make the ends really secure from creep.

1988 Olson 34, by Ericson Yachts.
Sail # 28400
Betamarine 25 (new 2018)
RCYC, Portland, Oregon
olson34 is online now  
post #5 of 38 Old 05-07-2019 Thread Starter
Senior Member
 
SanderO's Avatar
 
Join Date: Jul 2007
Location: Northport, NY
Posts: 3,691
Thanks: 2
Thanked 94 Times in 94 Posts
Rep Power: 13
 
Re: Jack Lines

This for deck only on mono hull. cockpit is set up already.

pay attention... someone's life depends on it
SanderO is online now  
post #6 of 38 Old 05-07-2019
Senior Member
 
Join Date: Feb 2010
Location: Narragansett Bay
Posts: 20,193
Thanks: 82
Thanked 573 Times in 549 Posts
Rep Power: 11
   
Re: Jack Lines

UV is a good point. Iíve never left them installed long enough for it to matter.

Iím not a fan of rope running underfoot. Iíve done my share of slipping upon it, as it rolls. If out of the way, it may work better.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Jeanneau 54DS

In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
Minnewaska is offline  
post #7 of 38 Old 05-07-2019
Senior Member
 
Join Date: Mar 2018
Posts: 178
Thanks: 14
Thanked 3 Times in 3 Posts
Rep Power: 2
 
Re: Jack Lines

You clip yourself into the bow cleat with a ~4-6ft tether? So if you fall off you'll be hanging from it underneath the bow of the boat, or along the side? How do you get back up? Are you alone, or do you rely on someone stopping the boat and pulling you up? BoatUS did a test and I believe they found you have about 60-90 sec to stop before drowning becomes a risk, so I would make sure this is all clear and set up properly.

Last edited by Scandium; 05-07-2019 at 12:14 PM.
Scandium is online now  
post #8 of 38 Old 05-07-2019
Administrator
 
Jeff_H's Avatar
 
Join Date: Feb 2000
Location: Annapolis, Md
Posts: 8,795
Thanks: 39
Thanked 432 Times in 362 Posts
Rep Power: 10
     
Re: Jack Lines

I am of the low-stretch school of thought with the thought that low stretch is likely to keep me on board and with the hope that the length of the line combined with catenary action should result in more than enough stretch to cushion the fall and prevent internal injuries. My current jacklines are kevlar cored 9mm line run from a hardpoint on the foredeck to my aft stern cleats. I understand PD's point about the hardpoint being forward of the stern cleat, but I have thought that the aft most position might give me a chance reaching the stern ladder or the loops of line that I hang off the quarters to give me something to grab onto and put a foot into. The current jackline sits against the intersection of the cabin and coaming with the deck so is minimally a tripping hazard.

If I was taking my boat offshore, I would want more hardpoints in the cockpit and would change to something like dyneema inside a webbing cover. I would want the jacklines fixed to hardpoints rather than cleats. The webbing is only there as a sun screen and further minimize the tripping hazzard.

Jeff
SanderO likes this.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Curmudgeon at Large- and rhinestone in the rough, sailing my Farr 11.6 on the Chesapeake Bay
Jeff_H is online now  
post #9 of 38 Old 05-07-2019
Senior Member
 
Join Date: Feb 2010
Location: Narragansett Bay
Posts: 20,193
Thanks: 82
Thanked 573 Times in 549 Posts
Rep Power: 11
   
Re: Jack Lines

My cockpit system consists of a homemade bridle that I afix around the base of the cockpit table. It has multiple attach points for each occupant, it provides full access to the helm and cockpit but physically prevents travel beyond the lifelines. I puked at midnight on last summers Gulf of Maine crossing and my head barely made it over the lifeline. Success. Sort of.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Jeanneau 54DS

In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
Minnewaska is offline  
post #10 of 38 Old 05-07-2019
Senior Member
 
pdqaltair's Avatar
 
Join Date: Nov 2008
Location: Deale, MD
Posts: 3,636
Thanks: 4
Thanked 127 Times in 125 Posts
Rep Power: 12
 
Re: Jack Lines

Quote:
Originally Posted by Minnewaska View Post
UV is a good point. Iíve never left them installed long enough for it to matter.

Iím not a fan of rope running underfoot. Iíve done my share of slipping upon it, as it rolls. If out of the way, it may work better.
^^ Absolutely right.

I've had two boats where this was not an issue: On the cat I could run it along the cabin chime, well off the deck and usable as a hand line, like a railing. On the tri, it runs over the inner tramp lacing; stepping on lacing is a bad idea to start with (there are holes--small enough to meet standards, but still poor footing).

But no, neither rope nor cable should be run on deck. only webbing.

Writing full-time since 2014
Author--Rigging Modern Anchors

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

"Keeping a Cruising Boat for Peanuts"
"Faster Cruising for the Coastal Sailor"
"Singlehanded Sailing for the Coastal Sailor"
pdqaltair is offline  
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











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
Small Boat Jack Lines and Safety Tethers sparrow16 General Discussion (sailing related) 2 04-24-2013 10:34 AM
Jack lines and tethers rjcaudle Seamanship & Navigation 61 12-29-2011 06:17 AM
Jack lines flyingwelshman Gear & Maintenance 4 06-26-2011 01:13 PM
Kids & Jack Lines? tmckinn Learning to Sail 9 06-28-2006 07:50 PM
Question bout Jack Lines mmccoy Gear & Maintenance 6 12-09-2004 03:09 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