3D Recon is a standalone 3D modeling sensor that delivers real-time sparse point clouds that double as a relative-to-structure navigation system and a quality control metric to ensure complete coverage of what is seen subsea. 3D Recon incorporates three machine vision cameras with a MEMS IMU rated to 4000 meters of water depth. The final output from 3D Recon is a near real-time high-density 3D model (point cloud or mesh). Initially developed for Integrity Management and Inspection, and Repair and Maintenance purposes, 3D Recon also has applications for mooring chain link inspection, hull inspection, jumper/spool metrology, pipeline Out-Of-Straightness surveys, pre-install/as-built, and many more subsea applications.