An agent submitted what appeared to be a straightforward general contractor account. The client did marine construction—seawalls, dock repairs, shoreline stabilization—but the agent figured it was essentially land-based work that happened near water. State workers' comp and standard GL felt sufficient.
When an employee was injured while working on a partially submerged piling, the workers' comp claim was denied because the work qualified under Longshore jurisdiction. The GL carrier questioned coverage because the work involved marine structures. And the client, who'd been in business for 15 years, was suddenly facing six figures in uninsured exposure.
The agent called us asking how they missed it. They didn't miss anything obvious. They missed the dozen small details that, together, made this a marine contractor account that needed marine contractor coverage.
Tip: If you've already confirmed your client is a marine contractor account, use our Marine Contractors Coverage Checklist to make sure the coverage structure fits the exposure before you bind.
The Problem: "Marine Contractor" Doesn't Always Look “Marine”
When agents think "marine contractor," they often picture shipyards, vessel repair, or diving operations. Those are marine contractors. But so are these:
- Companies that build or repair docks, piers, and seawalls
- Contractors who do dredging or excavation near navigable waters
- Pile driving operations along shorelines
- Bridge work over navigable waterways
- Marine environmental remediation
- Underwater or waterfront construction of any kind
The work doesn't need to happen on the water. It just needs to happen near it, over it, or in a way that involves marine structures or navigable waterways. That proximity changes everything about how coverage should be structured.
Where "Shore-Based" Work Stops Being Shore-Based
Here's what often trips agents up: a contractor can spend 80% of their time on dry land and still have significant marine exposure.
A dock builder who works from shore
A contractor builds boat docks. Most of the construction happens on the shoreline—cutting materials, assembling sections, staging equipment. But employees regularly work over water to install pilings, secure structures, or make final adjustments. That water-adjacent work triggers Longshore exposure, even if it's not the primary activity.
A seawall contractor who "never goes near vessels"
A contractor repairs seawalls and bulkheads. No boats involved. But the work happens at the water's edge, often involves equipment positioned partially in the water, and requires employees to work from floating platforms or barges. That's marine work, even if vessels aren't part of the equation.
A general contractor who took "one marine project"
A commercial contractor takes on a waterfront renovation that includes dock repairs. It's a small part of their annual revenue, but during that project, employees are exposed to maritime hazards. That exposure doesn't disappear just because it's not their core business.
The mistake some agents make is treating "marine contractor" as a binary classification. In reality, it's about what employees are actually doing on any given day—and whether that work creates exposures that standard coverage doesn't address.
Equipment Can Change Everything
Marine contractors use equipment differently than traditional contractors, and that difference matters for coverage.
Floating equipment and barges
If your client uses barges, floating platforms, or pontoon-mounted equipment—even occasionally—that's a marine exposure. It doesn't matter if they own the equipment or rent it for a specific project. Once work happens *from* a floating structure, you're in maritime territory.
Equipment that operates in or over water
Cranes that extend over water, excavators working from shorelines, pile drivers operating partially submerged—these aren't just "heavy equipment." They're marine equipment, and incidents involving them can trigger marine liability considerations that standard GL policies aren't designed to handle.
Specialized marine tools
Diving equipment, underwater cutting tools, marine-grade rigging—if your client uses it, they're probably doing marine work. And if they're doing marine work, they need marine coverage.
The challenge is that contractors often lease or rent this equipment for specific projects, so it's not obvious from their balance sheet or equipment schedule. You have to ask: "What equipment do you use, and where do you use it?"
The Labor Structure That Creates Coverage Gaps
Marine contractors rarely have a static workforce. Employees move between different types of projects, and responsibilities shift based on location and contract requirements. That variability creates coverage gaps that standard policies don't anticipate.
Dual-role employees
A construction foreman might supervise land-based work on Monday and dock construction on Wednesday. Same employee, same job title, completely different exposure. If you're classifying them based on their job description rather than their actual duties, you're guessing about coverage.
Subcontractors who do the marine work
Many general contractors subcontract the "marine parts" of a project—pile driving, underwater work, dock installation. That's smart project management. But if the subcontractor's coverage is inadequate or if indemnification agreements aren't structured correctly, the general contractor still has exposure.
Seasonal or project-based crews
Some marine contractors scale up for specific projects, bringing in temporary labor or specialized crews. If those workers aren't properly classified, you can end up with workers' compensation gaps, Longshore issues, or liability exposure that wasn't accounted for in the premium.
Ask your client: "Do your employees perform the same type of work year-round, or does it change by project? Do you use subcontractors for any waterfront or marine-related work? How do you handle labor for short-term or seasonal projects?"
How Operations Change Without Anyone Noticing
This is the issue that most often catches agents off guard: marine contractors evolve gradually, and those changes don't always trigger a coverage review.
New services
A contractor who primarily does seawall repairs starts taking on dock construction projects. Or a land-based excavation company adds dredging services. The new work introduces marine exposures, but because it happens incrementally, nobody treats it as a coverage trigger.
Geographic expansion
A contractor who worked exclusively on inland lakes starts taking projects on coastal waterways or navigable rivers. The type of work hasn't changed, but the jurisdiction has—and that affects which regulations apply and which coverage is required.
Larger projects with higher contract values
A contractor who used to do small residential docks starts bidding on municipal or commercial projects. The work is fundamentally the same, but the contract requirements, liability limits, and indemnification obligations are completely different.
Increased use of marine equipment
A contractor who rarely used barges or floating equipment starts relying on them regularly. What was occasional marine work becomes standard practice—but the coverage structure hasn't kept pace.
What to do about it
Don’t wait until renewal to ask about changes. If you hear your client mention new projects, new geographies, or new equipment, treat it as a potential coverage trigger and review the placement. And let your clients know upfront: if they start working near the water, even on a single project, that’s something you need to hear about before the work begins.
What Happens When You Get This Wrong
When a marine contractor is misclassified or underinsured, the consequences aren't minor:
- Workers’ comp provides no coverage for employees who qualify as Longshore workers, because an unendorsed WC policy simply doesn’t extend to that jurisdiction
- GL policies exclude coverage because the work involves marine structures or operations
- Excess policies don't respond because the underlying coverage is inadequate or misaligned
- Agents face E&O exposure when coverage gaps that should have been addressed at placement become the agent’s problem at claim time
And the agent ends up in a difficult conversation about why coverage everyone thought was in place... wasn't.
How to Approach Marine Contractor Accounts Correctly
You don't need to be a marine insurance expert to place these accounts well. You just need to ask the right questions and recognize when the answers indicate marine exposure.
Start with these:
- Where does the work actually happen? Not "we're a construction company"—where do your employees physically work? Are they ever on, over, or immediately adjacent to navigable water?
- What equipment do you use, and where do you use it? Do you use floating equipment, barges, or specialized marine tools? Even occasionally?
- Do your employees ever work from vessels or floating platforms? Even briefly, even rarely—if the answer is yes, that's marine exposure.
- What kind of work do your subcontractors do? If they're doing the marine-adjacent parts of your projects, you still have exposure.
- Have you added any new services, projects, or locations in the past two years? Growth is great. Unaddressed growth creates coverage gaps.
If the answers to these questions reveal marine exposure, even part-time or occasional, don't try to force it into a standard contractor placement. Structure it correctly from the start.
Once you've worked through those questions and confirmed you're looking at a marine contractor account, the next step is making sure the coverage structure actually fits the exposure. Our Marine Contractors Coverage Checklist walks through every line these accounts typically need so nothing gets missed before you bind.
And if you're working on an account that feels unclear, we're happy to review it with you before you submit.
Contact us for a 15-minute account review call.
(727) 578-2800 | Ask@LIGMarine.com
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