Definition
An insurer in maritime law. The assecurator is the party who underwrites or assumes the risk of loss on a vessel, cargo, or maritime venture — the functional equivalent of what modern practice calls a marine insurer or underwriter. The term derives from the Latin legal vocabulary of the medieval and early modern sea-trade tradition and appears primarily in civilian and admiralty sources.
The corresponding term for the insured party is assecuratus; the contract between them is the assecuratio, an early form of the marine insurance policy.
Common Confusion
Do not conflate assecurator with fidejussor (surety) or sponsor (guarantor). All three terms involve one party securing an obligation on behalf of another, but the assecurator's liability is triggered by a fortuitous maritime peril, while the fidejussor and sponsor answer for the default of a principal obligor. The risk structure is fundamentally different. The overlap in Latin root vocabulary has occasionally caused imprecision in secondary literature on the law merchant.
Why It Matters in Research
This is a term of historical legal Latin with no surviving currency in modern practice. Researchers will encounter it exclusively in pre-nineteenth-century admiralty sources, civil law treatises, and glossaries of the law merchant. Anyone tracing the doctrinal history of marine insurance — particularly the development of insurable interest, subrogation, or the obligation to indemnify — may need to move through sources using assecurator before those doctrines acquired their modern English vocabulary.
The Black's and Burrill entries both cite Loccen. de Jure Maritimo, Book 2, Chapter 5 — a reference to Johannes Loccenius (1598–1677), whose De Jure Maritimo et Navali was a standard civilian treatise on maritime law. Researchers pursuing the primary source should be aware that Loccenius wrote in Latin and drew heavily on continental ordinances, particularly Dutch and Hanseatic practice. The citation is genuine and locatable in research libraries with civil law collections.
A trap in historical sources: assecurator is sometimes used interchangeably with sponsor or fidejussor in older texts when the context involves guaranty rather than insurance, because the underlying Latin root (assecurare, to make secure or to guarantee) spans both concepts. Careful attention to maritime versus land-based context is necessary to confirm which obligation is meant.
Bouvier reduces the entry to two words — "An insurer" — which is accurate but strips the maritime limitation. Researchers relying on Bouvier alone may miss that the term carries a specifically admiralty connotation and would not typically appear in general commercial or suretyship discussions of the same period.
Historical Dictionary Support
All four source dictionaries agree on the core definition: assecurator means insurer in maritime law. Black's (both editions) and Burrill explicitly supply the parenthetical Latin equivalent aversor periculi — literally, "one who turns away danger" or "one who bears off the peril" — which is itself an instructive gloss. That phrase frames the insurer's function not as a passive risk-absorber but as an active deflector of loss, consistent with the indemnity logic that underpins marine insurance doctrine.
Burrill, characteristically, provides the most complete entry: he supplies the Latin grammatical origin (from assecurare), confirms the maritime context, and gives the full Loccenius citation with section number. Black's (1st and 2nd editions) track Burrill closely, suggesting that Black's drew on Burrill for this entry — a common pattern throughout the first two editions.
No source defines the term beyond the single-concept equivalence of "insurer," and none discusses the corresponding assecuratus or the contract form assecuratio. Researchers needing the full terminological family must consult Loccenius directly or use Burrill's entry for assecurare, which provides additional context.