Definition
In maritime law, petty average (also called particular charges or petty charges) refers to the routine operational disbursements that a ship's master necessarily incurs for the benefit of both the vessel and its cargo in the ordinary course of a voyage. These are expenses that arise from the customary requirements of navigation and port operations rather than from any emergency sacrifice or extraordinary event.
Typical examples include: pilotage fees for conducting a vessel through a harbor or channel; towage; lighthouse dues (light money); beaconage; anchorage fees; bridge tolls; and similar port or passage charges. The defining characteristic is that these costs are ordinary, expected, and distributed according to the custom of the particular port or trade route rather than apportioned through the formal average adjustment process.
Petty average is distinct from general average (where an extraordinary sacrifice or expenditure is made for the common safety of ship and cargo, triggering contribution from all parties) and from particular average (which covers partial losses falling on a single interest). Petty average sits in a third category: routine expenses that are shared between ship and cargo interests, but allocated by trade custom rather than by the law of average contribution.
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Common Confusion
PETTY AVERAGE vs. PARTICULAR AVERAGE vs. GENERAL AVERAGE: These three terms occupy adjacent conceptual territory and are frequently misread in older sources. General average involves a voluntary sacrifice or extraordinary expenditure for the common safety, requiring contribution from all interests. Particular average is an accidental partial loss borne by one party alone. Petty average covers neither — it is the class of ordinary, recurring operational charges that fall on ship and cargo as a matter of custom and contract. Researchers encountering "average" in historical shipping documents should determine which category applies before drawing conclusions about liability or contribution rights. The word "petty" here does not mean trivial or unimportant; it signals that these charges arise in the ordinary course rather than from casualty.
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Why It Matters in Research
Petty average is a term of art embedded in the customs of specific trades and ports, which means its meaning in any given historical document is partly determined by the usage of the place and period, not solely by legal definition. Researchers working with nineteenth-century charter parties, bills of lading, or freight contracts will encounter petty average clauses that allocate these charges between shipowner and cargo owner in varying ways. The allocation formula — who bears what share — was never fully uniform at common law and was heavily governed by trade custom.
The term appears with some frequency in historical shipping records, insurance policies, and admiralty pleadings, but drops sharply from modern commercial usage. Contemporary shipping practice has largely absorbed these charges into freight rates, demurrage clauses, or port disbursement accounts, and the York-Antwerp Rules (the governing international framework for general average) do not address petty average as a distinct category. This means a researcher tracing petty average into modern admiralty law will find the concept has been functionally dissolved rather than formally abolished — the charges still exist, but the label has faded.
For Law Mind corpus research, the most productive connections run through the General Average encyclopedia entry, which addresses the broader average framework including contribution and adjustment. Researchers should also watch for the older term lodemanage (pilotage by a local guide), which Burrill's flags as the historical antecedent to pilotage fees within petty average — that term appears in pre-nineteenth-century sources and will not be labeled as petty average.
Jurisdictional variation in how petty average charges were allocated between shipowner and charterer was significant in the nineteenth century, and American courts sometimes differed from English admiralty practice on which charges fell within the category. Treat any specific allocation rule found in historical sources as potentially jurisdiction- and trade-specific.
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Historical Dictionary Support
Black's and Burrill's are in substantial agreement, and their definitions are nearly identical in language — both derived from the civil law tradition that classified maritime expenses into categories of average. Both sources define petty average through its examples rather than through a formal legal test, reflecting the reality that the category was bounded by custom rather than statute.
Burrill's adds the historical note that pilotage was "formerly called lodemanage," which is a useful flag for researchers working in earlier sources. Neither dictionary addresses how petty average charges were actually allocated in practice between ship and cargo interests, or what happened when trade custom at the port of loading conflicted with custom at the port of discharge — gaps that matter for contract interpretation in historical admiralty cases.
Neither source distinguishes clearly between petty average as a category of expense and petty average clauses as contractual provisions in charter parties, though the latter became increasingly important as the nineteenth-century shipping industry standardized its documentation. Modern admiralty dictionaries and treatises have largely retired the term.
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Jurisdictional Note
English admiralty practice and American admiralty practice treated petty average charges with some variation during the nineteenth century, particularly regarding which disbursements qualified and how they were apportioned under charter party clauses. Researchers should not assume that an English admiralty ruling on a specific petty average charge applied identically in American federal admiralty courts.
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Encyclopedia Cross-Reference
General Average — York-Antwerp Rules, Contribution, and Adjustment (Law Mind Military, Veterans & Admiralty Law Encyclopedia)
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