Jon line length

[Scubaroo]

Yeah, I had the same thoughts about using a spool in *heavy* current.

 

[MaxBottomtime]

Sounds good, that's what we used to do. Right up until the thin line on the spool broke on my buddy one day in 6' seas and ripping current. We got him back to the line, but watching that happen affirmed for us that we want something beefier.

If you _NEED_ the jon line, line from a spool is not sufficient.

Did he tuck the spool through a loop and have a single line between him and the upline, or was it wrapped around the upline. Wrapping gives you two sections of line coming from the upline, thereby doubling the strength.

 

[wscdive]

I prefer a line eye to a snap on the tie off end, holds the anchor line better, and is easier to deploy. (besides, i dove with the john its named after and his is set up that way!)

 

[trob09]

Did he tuck the spool through a loop and have a single line between him and the upline, or was it wrapped around the upline. Wrapping gives you two sections of line coming from the upline, thereby doubling the strength.

Single line weight, but with the ease that it snapped, I'm not sure that would have mattered...

 

[dtdiver]

12 feet
i got tired of getting kicked in the head when others release from the line upcurrent of me
i use thicker cave line, wrapped on itself with inner tube tire
bowline loop on one end to hold on to
takes 3 secs to tie a timberline knot around the anchor line, doesn't slide, releases easily, and no hook to get tangled in my pocket

dt

 

[crestgel]

How about some pictures. I'm not too familiar with some of the terms.

I google jon line and came up with this

http://www.aquaexplorers.com/jon_line_clip.htm

It does not look strong.

 

[crestgel]

How well will the OMS Jon Line work?

http://www.omsdive.com/misc.html

 

[Tom Winters]

Use a 15' piece of 1" nylon webbing doubled back, and sew/fuse the end of the webbing in place so it can't be pulled out. That way you can use it from 7 1/2' out to the full 15' depending on what you're using it for. I've been clipped off on crowded uplines, and even 15' gets short in a strong current with yaboos kicking all around you.
OMS just uses a biner on the end - I like that little steel clip like aquaexplorers uses. When you have to use it, you don't want to be screwing around setting it too much.

 

[crestgel]

Use a 15' piece of 1" nylon webbing doubled back, and sew/fuse the end of the webbing in place so it can't be pulled out. That way you can use it from 7 1/2' out to the full 15' depending on what you're using it for. I've been clipped off on crowded uplines, and even 15' gets short in a strong current with yaboos kicking all around you.
OMS just uses a biner on the end - I like that little steel clip like aquaexplorers uses. When you have to use it, you don't want to be screwing around setting it too much.

Thanks for the directions. Any good source for nylon webbing? Should I make a loop on the each end for my hands? At 7.5' I can put my hand trough both loops and at 15' I can put it through one.

 

[Tom Winters]

Sew a loop at one end and rig it all up with some 1" triglides so you can adjust it as needed and still keep it at length in a current. Make sure you sew the thing with some strong thread. I'd glue it with some Aquaseal or Marine Goop first also. I use a Speedy Stitcher to sew heavy stuff like this or canvas:
http://www.speedystitcher.com/products.htm
These guys have webbing, buckles and a lot of other fun stuff:
http://www.reefscuba.com/ropewebbing.htm
The clip: http://www.scubacenter.com/TechnicalDivingGear.htm
or
http://www.northeastscubasupply.com/cat_misc_jonline.html
Later on, you might want to shorten the jonline - people use them in lengths from 5' to 15' - it all depends on what works for you, but this gives you a good start/.