UNDERWATER TUNNEL INSPECTION — PROJECT CHECKLIST

Route & geometry
[ ] Total intended inspection length
[ ] Cross-sections, gradient and elevation profile
[ ] Bends, transitions, constrictions and known obstructions

Water & operating conditions
[ ] Depth, flow range and expected visibility
[ ] Sediment and debris conditions
[ ] Isolation, shutdown and site permit requirements

Access & field logistics
[ ] Entry opening and launch/recovery area
[ ] Lifting, reel location and available power
[ ] Staffing, communications and emergency access

Inspection & evidence
[ ] Defects or condition to be assessed
[ ] Coverage and sensor requirements
[ ] Position reference, data formats and acceptance criteria

Failure & recovery
[ ] Response to snagging or lost communication
[ ] Retrieval equipment and contact points
[ ] Exit conditions and site owner responsibilities

Mark unknown information explicitly. Review the complete system and recovery plan before purchase.