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Admiralty Alphabet: Mastering the Supplemental Rules of Admiralty

Featured: Fraser K. Mitchell, Frederick Swaim III

For litigants and insurers navigating admiralty claims and maritime law defense, the Supplemental Rules of Admiralty remain foundational and essential to effective strategy and risk control in U.S. maritime practice. These Rules shape pleading choices, joinder options, asset security, vessel arrests, and exposure management—often in ways that differ from conventional federal practice. A working and nuanced knowledge of how the Rules interact with federal procedure and substantive maritime law defense can influence where cases are heard, what remedies are available, and how quickly leverage is obtained.

Start with A: scope and designations for maritime claims

Rule A is the bedrock—it defines the scope of the Supplemental Rules and frames how admiralty procedure diverges from the default Federal Rules. Two mechanisms under this umbrella are particularly important:

  • Designating a pleading as a maritime claim (commonly referenced as a 9(h) designation) when there is a separate basis for federal jurisdiction can alter the procedural track of the case and the tools available to litigants.
  • A tender practice (often discussed as 14(c)) allows a defending party to draw in a third party and structure that party’s posture as adverse to the original plaintiff, consolidating disputes that otherwise might proceed piecemeal. Decisions about whether and how to use these mechanisms should be tailored to the facts, defenses, and timing of the matter, because they can reposition issues and parties early in admiralty claims.

Rule B: jurisdiction, attachment, and ownership

Rule B authorizes attachment and garnishment of a defendant’s property when the defendant is “not found” within the district. A key consideration when contemplating a Rule B attachment is what specific entity is being garnished and whether the court in that district has jurisdiction over the property that is being attached. The federal circuit courts, and state laws governing attachment and garnishment, do not all consistently apply the same rules for whether property is located within a particular district. The rise of online banking and the use of intangible goods require close examination based on the jurisdiction of each attempted attachment and garnishment. Also, careful attention must be paid to who owns the property to avoid potential wrongful seizure and subsequent damages/sanctions that can follow from such an action. 

Rule C: maritime liens first, arrest second

In rem proceedings under Rule C are familiar to many maritime practitioners, but arrests hinge on whether a maritime lien truly exists. For clients accustomed to swift enforcement in other commercial contexts, the maritime framework demands disciplined proof of the lien’s basis before pursuing an arrest under Rule C.

Rule F: Shipowners’ Limitation of Liability Act

Rule F addresses the procedure of how to implement the Shipowners’ Limitation of Liability Act. The recent high-profile case of the M/V DALI alliding with, and collapsing, the Francis Scott Key Bridge in Baltimore on March 26, 2024, reignited media and legal discussions regarding limitation of liability. Seeking limitation can often be a crucial tactical maneuver that: (1) creates a concursus of all claims into a single forum; and (2) potentially limits the vessel owner’s liability to the post-casualty value of the vessel plus its pending freight. Timing is everything, and filing for limitation of liability is no exception and can make all the difference in the world.

Economic loss boundaries

It is important to remember the significant restrictions that Robins Dry Dock still imposes on any party wishing to recover loss of use, or economic, damages in instances of a maritime tort. Exceptions to this rule are limited but the application of state law can potentially be an avenue to avoid this prohibition.

Putting the Alphabet together: strategic implications for maritime claims

  • Forum and leverage: A proper 9(h) designation and a timely Rule F limitation filing can change where and how claims proceed, which affects settlement dynamics and litigation costs.
  • Security and recovery: Rule B’s reach is powerful, but only if courts in the chosen district recognize the property as present and the ownership as attachable—especially with intangibles. Misjudging this could risk losing early security.
  • Arrest strategy: Under Rule C, a vessel arrest without a solid lien foundation is vulnerable. Getting the lien theory right is the difference between immediate security and avoidable delay.
  • Exposure control: Rule F can limit liability and consolidate litigation, but late or incomplete filings can forfeit those advantages.
  • Available damages: Robins Dry Dock remains a formidable barrier to recovery of certain damages; and defending claims requires planning around its limits and any viable exceptions.

Mastery of the Supplemental Rules of Admiralty can significantly impact maritime claims. In an environment where procedural choices can make the grade, disciplined familiarity and compliance with these Rules are indispensable to effective maritime practice.

Disclaimer: This material is provided for informational purposes only. It is not intended to constitute legal advice, nor does it create a client-lawyer relationship between Galloway and any recipient. Recipients should consult with counsel before taking any actions based on the information contained within this material, which may be considered attorney advertising in some jurisdictions.

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Posts Featuring Fraser Mitchell and Frederick William “Billy” Swaim

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