About
Based in Long Beach, CA, Dinu's Dive is an underwater inspection and survey firm. Work covers underwater inspection. Get in touch to discuss the scope and site conditions.
Hours
| Monday | 8AM-4:30PM |
|---|---|
| Tuesday | 8AM-4:30PM |
| Wednesday | 8AM-4:30PM |
| Thursday | 8AM-4:30PM |
| Friday | 8AM-4:30PM |
| Saturday | Closed |
| Sunday | Closed |
Frequently Asked Questions — Long Beach, CA
What permits or advance lead time should I plan for when scheduling an underwater inspection in Long Beach, CA?
Plan for a site-specific environmental and regulatory review; for navigable waterways this may involve a USACE permit and state fish and wildlife clearances, while local harbor authorities may have their own rules. Coordinate with your facility's operations team so intakes, gates, or valves can be isolated before any diver approaches—differential pressure is a lethal hazard. Also expect the dive team to be OSHA 29 CFR 1910 Subpart T compliant with a standby diver on every entry; lead times are usually driven by permitting and outage windows, not the dive itself.
How is underwater inspection pricing structured, and why do bids vary so much?
Commercial diving is quoted as a crew/spread day rate plus a separate mobilisation charge, with inspection priced per structure or substructure unit. Mobilisation is the line that most often explains a large gap between two bids, because it reflects geographic distance, equipment logistics, and local access. In-water inspection generally avoids drydock or haul-out costs, but barges, boats, or diver access platforms may still be required.
What should a defensible condition report include, and who signs it?
A defensible report documents the dive team's observations, annotated photos and video, measurements, and the applicable code or standard used—for bridges that may be FHWA-NHI team leader qualification and NBIS reporting, for tanks AWWA M42, and for vessel hulls 46 CFR 71.50-3. It should clearly separate measured data from professional opinion and include any limitations on visibility or access. The signing authority depends on the structure type; for federally funded bridges the team leader must meet FHWA-NHI requirements.
When is an in-water inspection sufficient instead of drydocking or haul-out?
In-water inspection is sufficient when the areas of concern are below the waterline and can be reached without dewatering; it is common for underwater bridge substructures, tanks, and UWILD hull exams. The trade-off is that above-water access, coating on the splash zone, or internal structure may require a haul-out or drydocking. For intakes, gates, and valves, only isolated piping is safe for diver entry—never work against active differential pressure.
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