CHARLESTON, SC • ADCI CERTIFIED • OSHA COMPLIANT
WHERE OTHERS CAN'T
WE DIVE.
Charleston's commercial diving contractor built for ship husbandry at scale. Transparent pricing, engineering-grade documentation, and a crew that's ready when your vessel is in port.
SAFE
Insured & Documented
10+
Years of Commercial Diving Experience
ADCI
Certified Crew & Supervisor on Every Job
24/7
Rapid Response Capability
WHAT WE DO
SERVICES BUILT FOR EVERY DEPTH
From prop polishing while your cargo unloads to full FERC inspections of hydro facilities — we bring engineering precision underwater.
SHIP HUSBANDRY & HULL SERVICES
Our core focus. We service large commercial and cargo vessels while they're in port — no downtime, no schedule disruption. With 34+ vessels entering Charleston weekly, we've built the logistics to service them efficiently. Services other companies simply don't offer at scale.
- Metal Works
- Prop Polishing
- Sea Chest Servicing
- Transducer Replacements
- Anode Replacements
- Thruster Unfouling
- Underwater Paint Repair
- Vessel Dry Docking
MANUFACTURING & POWER GENERATION
South Carolina's industrial facilities depend on water-intensive systems. We're the local alternative to costly out-of-state contractors — with faster mobilization and engineering-grade reporting.
- Raw Water Intake Servicing
- Traveling Water Screen Inspections
- Trash Rack Replacements
- F.E.R.C. Inspections
- Timber Seal & Gate Repair
- Penstock Inspections
- Leak Detection & Sealing
INSPECTIONS & GENERAL SERVICES
The foundation of commercial diving — visual and tactile inspections that yield specialized project work across industries.
- Pipeline Inspections
- Foundational Scour Inspections
- Search & Recovery
- NDT & Evaluation
- Underwater Welding & Cutting
WHY CHOOSE US
THE STANDARD
HAS BEEN LOW.
WE'RE CHANGING IT.
Commercial diving in the Southeast is often handled by out-of-state contractors with high mobilization costs and generic deliverables. Local competitors rely on traditional practices, dated reporting, and limited transparency.
Stewart's Marine was built from the ground up to change that — leveraging engineering-firm precision, global vessel data and tracking, with transparent pricing to give clients something they've never had before: a diving contractor you can trust for professional, transparent operations.
| CAPABILITY | STEWART'S | OTHERS |
|---|---|---|
| Ship husbandry while in port | ✅ | ❌ |
| Engineering-grade video reports | ✅ | ❌ |
| Pre-arrival vessel outreach | ✅ | ❌ |
| Rapid response capability | ✅ | ❌ |
ENGINEERING-GRADE DELIVERABLES
Every job includes a full written report and in-water video documentation delivered to the client. ADCI documentation, dive logs, and diver assessments on every operation.
DIRECT VESSEL MARKETING
We identify and contact vessel managers weeks before arrival. We reach clients before they ever need to search for us.
NO SCHEDULE DISRUPTION
Our "Metal Works" compressed package is designed to complete while your vessel unloads cargo. Polished and inspected before you leave port. No delays. No excuses.
FULL COMPLIANCE STACK
ADCI, OSHA 29 CFR 1910, US Navy Dive Manual Rev 7, NOAA Dive Manual Rev 6, and 46 CFR Part 197. USL&H, Jones Act, and full commercial insurance on every operation.
How we work
THE METAL WORKS PROCESS
Every ship husbandry job follows a precise 9-step sequence. No improvisation. No shortcuts. Documentation and video at every stage — delivered to the client at completion.
STEP 1
VESSEL CONTACT & CLEARANCE
Establish contact with the chief engineer. Confirm LOTO clearance and safe-to-dive authorization. Moor the dive boat to the bow of the vessel.
STEP 2
TRANSDUCER SERVICE
Diver 1 enters water at bow position to service, clean, and inspect all transducers and electronic hull equipment.
STEP 3
SEA CHEST INSPECTION
Diver 1 inspects, cleans, and documents the condition of all sea chests with video record and written notes.
STEP 4
DIVER ASSESSMENT
Diver 1 egresses. Full post-dive assessment conducted. Boat repositioned to stern of vessel to prepare for propeller work.
STEP 5
PROPELLER POLISH
Divers 2 and 3 enter. Full inspection, cleaning, and polishing of the propeller assembly. Efficiency-focused — fuel savings begin immediately.
STEP 6
VIDEO DOCUMENTATION
Diver 3 performs a complete video inspection pass of the finished service. All completed work captured on record.
STEP 7
FINAL EGRESS & ASSESSMENT
All divers egress and receive post-dive health assessments. Supervisor confirms full operational completion.
STEP 8
CHIEF ENGINEER HANDOFF
Chief engineer is notified of completion. All findings, conditions, and work performed are verbally reported. Ship returned to full operational status.
STEP 9
WRITTEN REPORT DELIVERY
Full written report and video documentation package delivered to the client. Complete record for engineering, insurance, and compliance purposes.
COMPLETED WHILE IN PORT
The Metal Works package is designed to be completed in under one day — while your vessel is actively unloading cargo. Zero schedule impact. Increased propulsion efficiency from the moment you depart.
COMPLETED WHILE IN PORT
The Metal Works package is designed to be completed in under one day — while your vessel is actively unloading cargo. Zero schedule impact. Increased propulsion efficiency from the moment you depart.
WHO WE ARE
TRISTIN A. STEWART
OWNER & DIVE SUPERVISOR
With over a decade working commercial diving operations across the United States — from emergency Navy vessel repair to bridge inspections for multiple state governments to ship husbandry on commercial cargo fleets in California.
I’ve led advanced diving operations, including mixed gas work, hyperbaric chamber procedures, underwater welding and burning, and penetration diving.
Stewart's Marine was built because I've worked alongside the competition and seen the gap firsthand — outdated reporting, inflated costs, and a lack of transparency that clients deserve better than. This company is built to close that gap.

TRANSPARENT PRICING
NO SURPRISES.
NO NEGOTIATIONS.
We publish our rates because we've built them to be fair. Every figure is calculated from a fully-burdened and insured crew.
3 - MAN DIVE CREW
STANDARD OPERATIONS
$2,970 / DAY
+ $500 mobilization fee per job
- 1 ADCI Certified Dive Supervisor
- 2 ADCI Certified Air Divers
- Full Dive Station and Equipment
- Written Report + Video Documentation
- ADCI-Compliant Dive Logs and Assessments
4 - MAN DIVE CREW
FULL CAPACITY OPERATIONS
$3,559 / DAY
+ $500 mobilization fee per job
- 1 ADCI Certified Dive Supervisor
- 3 ADCI Certified Air Divers
- Full Dive Station and Equipment
- Written Report + Video Documentation
- ADCI-Compliant Dive Logs and Assessments
- Maximum Topside Safety Coverage
- Concurrent Multitask Capability
- Priority Scheduling
RATE BASIS
Rates are based on standard packages: Travel rates, special tooling, and additional equipment are quoted separately. Contact us for a custom quote on your specific job.
RATE BASIS
Rates are based on standard packages: Travel rates, special tooling, and additional equipment are quoted separately. Contact us for a custom quote on your specific job.
GET IN TOUCH
READY WHEN YOUR VESSEL IS.
Whether you're scheduling ahead or need an emergency response, we're equipped and standing by. Fill out the form for a custom quote, or reach us directly via email.
Charleston, South Carolina
Charleston, South Carolina
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