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Marine Insurance Glossary

Plain-English explanations for the insurance conversation. Policy definitions and applicable law govern the actual matter.

Hopper dredge Essayons underway on blue water.
Hopper dredge Essayons underway on blue water. Photo: Michelle Helms / U.S. Army Corps of Engineers, Portland District. Illustrative imagery.
USL&H
Common insurance shorthand for coverage addressing obligations under the Longshore and Harbor Workers’ Compensation Act. Actual statutory eligibility depends on the worker, work and circumstances.
Jones Act
Federal law providing a negligence remedy against an employer for qualifying seamen injured in the course of employment. It is not itself an insurance policy.
Maritime Employers Liability (MEL)
Insurance terminology for certain maritime employer liability exposures. Scope, insured capacities and exclusions depend on the form; it is not interchangeable with statutory Longshore coverage.
Protection & Indemnity (P&I)
Vessel liability insurance whose scope depends on the insured capacity, vessel and contract. It is distinct from hull physical damage.
Hull insurance
Insurance addressing specified physical damage interests in a vessel, subject to covered causes, valuation and policy conditions.
Bumbershoot
A marine umbrella or excess coverage description. The underlying schedule, exclusions and attachment terms matter more than the label.
Marine Contractors Pollution Liability
Coverage terminology for certain pollution liabilities arising from contractor operations. Vessel, transportation, disposal and known-condition provisions require review.
Vessel operator
A party operating a vessel. Its legal responsibilities and insured status depend on the circumstances and agreements.
Charterer
A party using a vessel under a charter agreement. A bareboat charter and a crewed charter can allocate responsibilities differently.
Additional insured
A party afforded insured status under another party’s policy subject to the applicable wording and conditions. Certificate-holder status alone is not equivalent.
Contractual indemnity
An agreement allocating specified liability between parties. Enforceability and insurance support require separate review.
Completed operations
Liability exposure associated with work after completion. The policy definition, exclusions and period of coverage control.
Waiver of subrogation
A provision affecting an insurer’s recovery rights against specified parties, subject to the policy or endorsement. It does not replace additional-insured coverage.
Situs
The location component of a statutory coverage analysis, including the specific Longshore locations described in the law.
Status
The nature of the worker’s employment and duties as relevant to legal eligibility. A job title alone is not conclusive.
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