Five disciplines. One accountable crew.
From hairline weld repairs on ballast tanks to full subsea pile reconstruction, every Charlie Frey service is delivered by divers who also hold engineering credentials — no handoffs, no interpretation errors.
Underwater Welding
Class-approved wet welding and hyperbaric dry-chamber welding on structural and pressure-critical components. Our AWS D3.6M Class A welders perform repairs that are certified equivalent to surface welds — recognized by ABS, DNV, Lloyd's Register, and Class NK.
Capabilities
- Hull plate insert welding
- Ballast tank structural repair
- Hyperbaric habitat welds to 200m
- Fillet and groove welds on frames
- Sacrificial anode replacement
Benefits
- Zero dry-dock time
- AWS D3.6M Class A certified
- Full NDT inspection records
- Class society pre-approved
Propeller Polishing
Surface roughness restoration on fixed-pitch, controllable-pitch, and azimuthing propellers. Measured, verified, and documented to ISO 484 Class S — the finest class of propeller finish recognized by the marine industry.
Capabilities
- Fixed & controllable-pitch propellers
- Stainless, bronze, NAB alloys
- Azimuthing thruster blade work
- Rudder and stabilizer polishing
Benefits
- Up to 8% fuel efficiency recovery
- Reduced cavitation noise
- Extended coating life
- EEXI / CII compliance support
Hull Cleaning
Eco-compliant in-water hull cleaning using soft-brush rotary tools and closed-loop effluent capture systems. Restores speed and efficiency without compromising the antifouling coating system — compliant with BIMCO, IMO, and California State Lands biofouling guidelines.
Capabilities
- Full-hull and niche-area cleaning
- Soft-brush, coating-safe tools
- Closed-loop effluent capture
- Pre/post photo and video log
Benefits
- BIMCO standard compliant
- Restores service speed
- Preserves AF coating life
- Eco-certified effluent capture
Thruster Repairs
In-water repair of azimuth, tunnel, and retractable thrusters. Our engineering dive teams execute seal replacement, rope cutter installation, blade removal, and bearing inspection without dry-docking the vessel — often saving weeks of off-hire time.
Capabilities
- Main shaft seal replacement
- Rope cutter retrofit installation
- Blade removal and replacement
- Tunnel grid repair
Benefits
- No dry-docking required
- Days, not weeks, of downtime
- OEM-equivalent workmanship
- Class-witnessed completion
Marine Construction
Subsea concrete work, pile rehabilitation, pier and wharf reinforcement, intake structure installation, and port infrastructure repair. Delivered in partnership with civil engineers, permitted to the highest environmental and structural standards.
Capabilities
- Pile driving and jetting
- Pier and wharf rehabilitation
- Intake and outfall structures
- Subsea concrete formwork
- Cofferdam and bulkhead works
Benefits
- Civil engineer partnerships
- Environmental permit support
- Proprietary subsea form system
- Long-warranty workmanship
Data transparency on every work order.
The Fleet.io platform gives technical superintendents real-time visibility into every Charlie Frey engagement — live streaming dive video, thickness measurements, corrective-action recommendations, and classification society compliance records. All searchable. All exportable. All permanent.
Request a DemoScope your job with an engineering account manager.
Send us your vessel particulars and work requirement. We'll return a scoped proposal within four business hours.