Commercial Vessel Repair — Dry Dock, On-Site & Off-Site
DMI provides comprehensive repair and modernization services for commercial vessels from our Portland, Oregon shipyard and at locations throughout the West Coast. With multiple dry docks, in-house engineering, and mobile deployment teams, we handle everything from propeller repairs and engine repowers to complete pilot house construction — with the builder-level expertise that only a full-service new construction yard can offer.
On-Site Dry Dock Repair Services
Our Portland shipyard features multiple dry docks, giving us the controlled access needed to safely perform complex underwater and structural work on vessels of all sizes.
Common dry dock services include:
Propeller Repairs & Balancing — Restoring hydrodynamic performance and eliminating vibration issues that accelerate wear on shafting and bearings.
Shaft Alignment & Rudder Work — Precision laser alignment and rudder repairs that protect drivetrain longevity and improve handling.
Hull Plating Renewals — Replacing corroded or damaged hull steel to restore structural integrity and prevent costly in-service failures.
Tank & Piping System Refurbishment — Inspection, cleaning, repair, and upgrade of fuel, ballast, and cargo tank systems.
Coating & Corrosion Protection — Surface preparation and high-performance marine coating application below and above the waterline.
Engine Repowers & Propulsion Upgrades
Repowering is one of DMI’s core specialties. Whether you’re upgrading to a more fuel-efficient diesel, integrating a hybrid propulsion system, or modernizing an aging drivetrain, our team manages the entire process — from removal of old equipment through precision realignment, installation, and sea trial testing.
Proper shaft alignment is critical to smooth operation and long engine life. Our mechanics use laser alignment tools and proven techniques to ensure every repower delivers the performance and reliability you expect.
Pilot House Construction & Structural Modifications
For vessels requiring improved visibility, updated electronics suites, or enhanced crew accommodations, DMI designs and installs complete new pilot houses and wheelhouse structures.
Our in-house engineering team develops custom designs that integrate with your existing hull structure. Our fabricators build and install them to the same standard as new construction. The result is a modernized vessel that improves safety, operational efficiency, and crew comfort — without the cost of a full newbuild.
Off-Site & Mobile Vessel Repair
When a vessel can’t come to us, we come to the vessel. DMI deploys skilled repair teams and equipment to docks, anchorages, and third-party facilities across the West Coast — minimizing transit time and keeping your assets earning revenue.
Off-site capabilities include structural steel repairs, mechanical overhauls, electrical and control system upgrades, piping work, regulatory compliance upgrades, and more.
Additional Repair & Modernization Services
- Hull and structural steel repairs
- Electrical and control system upgrades
- Mechanical overhauls
- Regulatory compliance upgrades (USCG, ABS)
- Corrosion protection and marine coating applications
The DMI Difference: Builder-Level Repair Expertise
Because DMI builds commercial vessels from the keel up, our repair technicians understand not just how to fix a problem — but how the system was originally designed to function. That insight leads to more durable repairs, fewer callbacks, and solutions that often improve on the original equipment.
Our project managers provide clear timelines, transparent cost estimates, and consistent communication throughout every job — because we know vessel downtime directly affects your revenue.
Trusted by West Coast Operators for 40+ Years
DMI has served tug operators, barge companies, pilot associations, and tanker fleets across the Pacific Northwest for more than four decades. Our combination of new construction knowledge and full-service repair capability makes us the dependable partner operators return to again and again.
Contact DMI today to discuss your repair needs — dry dock, on-site, or off-site. Let’s keep your fleet operational and competitive.
