Best Practices for Backmount Survey Rigs on Long EchoQuilt Dives

Backmount doubles anchor long penetration surveys, but a badly mounted sensor cluster produces noisy data you cannot trust on publishable cave maps. This piece walks through harness placement, manifold behavior, and survey-slate discipline for teams running backmount survey rigs on long EchoQuilt dives deep into Florida and Yucatán systems.

Backmount doubles are still the dominant configuration for long cave dives in the United States. The NSS-CDS Standards and Procedures 2023 specifies backmount manifolded doubles with at least 4,200L or 150 cubic feet of starting gas for full cave certification, which matches what most Florida survey teams carry when they penetrate more than 600 meters from daylight. The rig is proven, but it was never designed with a survey sensor package in mind.