QUESTIONS FROM THE QUAYSIDE

It is the use of underwater robotic systems that execute some inspection tasks without continuous manual commands. People still define the task, operating limits and review requirements. Autonomy may cover a complete mission or only a function such as maintaining stand-off while scanning a surface.

An AUV normally operates without a continuous physical control tether. An ROV is normally tethered and remotely operated, although it may automate station-keeping or inspection motions. These labels do not establish inspection capability: the payload, control performance and validated method matter more.

Acoustic sensors can support navigation and some inspection tasks in turbid water. They do not reproduce all the detail or material information available from a suitable optical or contact method. If the question requires a visible surface feature, switching to sonar may not answer it. Compare the sensing methods.

No. Detectability depends on size, orientation, range, acoustic geometry and the validated method. Fine cracks may need a different qualified examination. A lack of a visible acoustic indication should not be reported as proof of a crack-free surface.

It may combine inertial sensors, Doppler velocity measurements, pressure, acoustic positioning and feature-based navigation. The result is an estimate with uncertainty, not continuous underwater satellite positioning. The record should show when navigation quality changed. Read about navigation limits.

No. Coverage depends on the sensor footprint, viewpoint and usable data. Obscured or unobserved areas must be reported even when the vehicle follows its route. A coverage claim should identify its denominator and the conditions used to classify data as usable.

It can reduce some exposure and collect useful evidence, but it does not replace every intervention or qualified examination. Any diving work needs its own compliant planning and competent team. Cleaning, physical access and specialist testing may require a different intervention method selected through a proper risk assessment.

Automated tools can assist review, but their outputs need validation and appropriate human oversight. A qualified responsible person must connect findings to the asset's engineering requirements. Model confidence, inspection confidence and structural acceptability are different concepts.

It should include scope, usable and missing coverage, source records, location references, measurement limitations, processing provenance, reviewed findings and assigned follow-up actions. The deliverable should make it possible to revisit the evidence, not merely admire the final model. Use the review checklist.