Tether managemnt


#1

I tried a 200’ dive yesterday and had a heck of a time managing the tether drag. It was calm but the boat was free drifting so that movement didn’t help. I have read previous discussions for a drop or clump weight and want to rig something up. Anchoring would be an option and the rode would give you a visual reference to follow to the bottom which might be nice.

I am thinking the easiest option would be a 4lb weight attached to a fishing rod with a carabiner to run the tether through. I think it would be good to do a short length of light fishing line or a downrigger clip so the tether could be broken away if needed. Plan to keep the weight well off the bottom to avoid snagging something.

Any other thoughts on managing tether drag would be appreciated. Very curious in seeing what’s in the deep. Yesterday I saw shrimp, sea pens, lots of a long skinny pink fish I haven’t identified yet, flounder and the sea bed was filled with holes from some creature. Unfortunately the video was horribly shaky due to fighting the tether, but I will try to capture some video stills to post.

Merry Christmas! Trident’s the best present of the season, even if I bought it myself


#2

A clip of horribly shaky/bouncy video at 200’ but saw a couple things.

Today I tried again. Tried dropping the Trident down with a 4lb weight on a fishing rod and a carabiner hooked to the tether. I thought when it got to the bottom the Trident would be able to pull some tether through the carabiner but there was too much current and it was just stuck by the weight. Then tried diving to 200’ first then dropping the weight down but somehow that managed to get the tether a bit wrapped in the fishing line a bit. Was able to untangle it but no luck.

Dropped anchor and that helped but still had lots of drag from the tether at that depth. Next time will try getting a larger carabiner and ring to let the tether run through and try dropping the weight directly down the anchor line, seems like too many lines spread around the boat is a recipe for a tangled mess. Will post another clip when I get footage edited lots of shrimp and a couple sculpin and Tanner crab today.


#3

I have started planning my first Trident dive using a clump weight on the tether.

I have been trying to find a China finger/strain relief stocking for a 4 mm tether, but without success!

Here is my very first attempt to distribute pull strain from clump weight over approx 15 cm of tether and think that will be sufficient!

I’m using a std. Inhouse el.cabel & tape for el. cables!

The rope from the el.cable to the clump weight will break with less than 20 kg pull. The tether has a breaking strength of 100 kg!

See my below pictures!

Anyone having a better solution for the clump weight?

I have started planning my first Trident dive using a clump weight on the tether.

I have been trying to find a China finger/strain relief stocking for a 4 mm tether, but without success!

Here is my very first attempt to distribute pull strain from clump weight over approx 15 cm of tether and think that will be sufficient!

I’m using a std. Inhouse el.cabel & tape for el. cables!

The rope from the el.cable to the clump weight will break with less than 20 kg pull. The tether has a breaking strength of 100 kg!

See my below pictures!

Anyone having a better solution for the clump weight?


#4

Its not exactly the same but as a fall back when we tow our side scan (2 tonne breaking strain cable) we normal use a klein grip (not suggesting that for this application) but occasionally we have attached the cable to the tow point via a Klemheist knot which should work in this application

https://en.m.wikipedia.org/wiki/Klemheist_knot

For this application I would also add a bit of electrical tape over the knot to prevent slip (it shouldn’t once loaded)

Scott


#5

For some reason your pics didn’t attach. There’s another thread on Drop/Clump weight that folks have posted ideas on.


#6

SO how did the clump weight work out?
I’m trying to figure something out.


#7

I have not yet tried the clumpweight set-up in the sea, but have everything available. Need some calme sea, dry weather and an extra person to join me!