Definition
Jaotus is the deliberate throwing of cargo overboard in order to lighten a vessel or preserve it from peril. When goods are sacrificed in this manner, the loss is not borne solely by the owner of the jettisoned cargo; instead, it is distributed among all parties with a financial interest in the voyage — shipowner, cargo owners, and freight interests alike — through the principle of general average. Jaotus is thus both the act of maritime sacrifice and the triggering event for a general average claim.
The term is a Latin form, used in civil and admiralty law, and is closely associated with the Lex Rhodia de Jactu, the ancient maritime rule governing the apportionment of jettison losses. It is largely interchangeable with the more familiar English term jettison, though jaotus appears primarily in historical legal sources and formal admiralty pleading.
Common Confusion
Jaotus is not the same as accidental loss or cargo damage resulting from weather, collision, or other misfortune. The defining character of jaotus is voluntariness: the sacrifice must be deliberate and made for the common benefit of the voyage. Cargo lost incidentally during a storm is not jaotus and does not automatically give rise to a general average claim. Researchers encountering the term in historical admiralty records should also distinguish it from jactus, a variant spelling in some Latin sources, and from the broader concept of general average itself — jaotus is the precipitating act; general average is the legal consequence and the method of distributing the resulting loss.
Why It Matters in Research
Researchers working in admiralty law, maritime insurance, or the history of commercial law will encounter jaotus almost exclusively in older sources. The term effectively disappears from practical legal usage after the nineteenth century, displaced entirely by jettison in English-language admiralty practice. In the Law Mind corpus, jaotus functions as a gateway term: finding it signals that the surrounding text is engaging with civil law foundations of admiralty doctrine, likely drawing on Justinian's Digest or the Rhodian sea law tradition rather than English common law sources.
The citation to Barnard v. Adams, 10 How. 303 (1850), recorded in Black's, is significant for corpus navigation. That case is a leading U.S. Supreme Court decision on general average and jettison, and it demonstrates that by the mid-nineteenth century, American admiralty courts were working through the same foundational questions — voluntary sacrifice, common benefit, proportionate contribution — that the Digest had addressed under this Latin term. Researchers tracing the reception of Roman maritime law into American admiralty practice should treat jaotus as a bibliographic marker pointing toward that lineage.
One research trap: the variant spelling in the Black's supplemental entry ("jaotus" versus the more standard Latin "jactus") may reflect transcription inconsistency across historical printings. Cross-check against jactus and jettison when searching historical indexes and digests.
Historical Dictionary Support
Black's Law Dictionary (2nd Ed., Supplemental) defines jaotus as the throwing of goods overboard to lighten or save the vessel, with the result that goods so sacrificed become a proper subject for general average. The entry cites Digest 14.2 (De Lege Rhodia de Jactu), the foundational Roman law title on jettison, and Barnard v. Adams as American authority.
No other shelf sources in the Law Mind corpus carry a dedicated entry for jaotus, which reflects the term's status as learned civil-law vocabulary rather than working common-law terminology. The historical dictionary entry is brief but structurally complete: it captures the act, the legal consequence, and the ancient authority in a single sentence. What it does not address — and what later admiralty scholarship fills in — is the mechanism of general average adjustment, the role of the average adjuster, and the conditions under which the jettison must occur (necessity, common peril, voluntary act) for the contribution obligation to attach.
Jurisdictional Note
Jettison and general average are governed in the United States primarily by admiralty and maritime law, which is federal in character. The substantive rules have been substantially harmonized internationally through the York-Antwerp Rules, adopted by commercial practice rather than statute, which most bills of lading incorporate by reference. Domestic variations among trading nations in how general average is adjusted make this an area where the governing contract documents — not just the forum's law — determine outcomes.