On Thu, Jul 26, 2018 at 1:06 PM, Rod Beck <rod.beck@unitedcablecompany.com> wrote:
only submarine cable can handle long term immersion
Any gel-core direct burial cable can handle long-term shallow water immersion. Steve is correct: the fiber in many manholes are underwater until the next time someone needs to climb down and make a new splice. I once asked a dark fiber provider to splice from a particular manhole and they had to send someone out to look because it had somehow fallen off their map. When they popped the cover to look, the vault was completely inundated. Hadn't caused them the slightest difficulty. Submarine cable is needed for deeper water (higher pressures) with more armor against damage since it's just laying on the seafloor exposed to everything that happens by. Regards, Bill Herrin -- William Herrin ................ herrin@dirtside.com bill@herrin.us Dirtside Systems ......... Web: <http://www.dirtside.com/>