That time I switched from steel to fiber optic cable for a job in Galveston

I had this underwater repair job in Galveston where my steel cable kept corroding after just 3 months in the saltwater. Swapped to a fiber optic tether and it handled the sand and salt way better for a full year without issues. Has anyone else made the switch and seen a difference in gear longevity?

2 comments

2 Comments

dixon.ryan1mo ago

Yeah you had that problem too? I did the same thing on some dock work in Louisiana. Steel cable was rusting out in like 2 months. Switched to a fiber optic tether and it lasted over 18 months with just some minor scuffing. The big difference for me was the sand and grit in the saltwater. Steel would get pitted and snap. Fiber just flexed and kept working. I was skeptical at first but it paid for itself real quick.

white.grant1mo ago

One thing that doesn't get talked about enough is how fiber optics handle the constant flexing from wave action. Steel cable develops micro-fractures along the wire strands from the back-and-forth motion, long before you see any visible rust. Those tiny cracks let saltwater seep deeper inside the wire, so even if the outside looks okay, the core is already weakening. Fiber doesn't have that same grain structure problem. It just bends and returns to shape without that internal stress cracking.