Lattice Neptune

The problem

Subsea cables, interconnectors, pipelines and other seabed assets are still inspected mainly through periodic campaigns. Between campaigns, operators have limited local information on burial loss, seabed disturbance, damage or third-party activity. Low-cost AUVs can patrol more often, but repeatable inspection requires seabed reference points for INS correction.

The Neptune solution

Lattice Neptune creates an installed seabed field that AUVs can use to correct navigation drift, repeat routes and recover processed information from Lattice devices. The output is route-registered information that can be compared with previous patrols and used to prioritise inspection or intervention.

How it works

AUVs follow pre-planned routes using inertial navigation between Lattice nodes. At defined points, the AUV receives navigation correction, transfers selected information, conducts sensor records and stores system health. Data is transferred to the base station through magnetic backhaul or high-speed dock offload.

Customer outputs

• AUV INS correction at defined seabed reference points.
• Repeatable AUV patrol routes in GNSS-denied water.
• Processed information recovered from Lattice devices.
• Route-registered evidence of exposure, movement, disturbance and anomalies.
• Inspection priorities for ROV, vessel or diver follow-up where required.

Applications

• Subsea cables and power interconnectors.
• Pipeline and flowline corridors.
• Offshore energy assets and export routes.
• Port approaches and utilities.
• Strategic seabed passages and critical underwater infrastructure.
• Environmental monitoring routes where repeatability matters.