Authored By: Bello Ololade Taofeekat
Introduction
Maritime law is often perceived as a dense thicket of international conventions and archaic terminology. However, at its core lies a remarkably simple and equitable concept known as general average. Unlike particular average, which refers to a private loss borne solely by the owner of the damaged property, general average is a principle of shared sacrifice. Originating from the Rhodian Law of the ancient Greeks over two thousand years ago, the principle dictates that if a sacrifice is made to save a ship and its cargo from a common peril, the loss should be shared proportionately by all parties who benefited from that preservation. This article explores the legal framework of general average, its essential elements, the landmark cases that defined it, and its continued relevance in an era of global supply chains.
The Legal Foundation: The York-Antwerp Rules
The modern application of general average is governed primarily by the York-Antwerp Rules (YAR). It is a unique aspect of maritime law that the YAR are not an international treaty or a mandatory statute. Instead, they are a set of standard contractual terms. Because the shipping industry values uniformity, these rules are almost universally incorporated into bills of lading, charterparties, and marine insurance policies.
The definition provided by Rule A of the York-Antwerp Rules 2016 is the ‘gold standard’ for identifying a general average act:
*There is a general average act when, and only when, any extraordinary sacrifice or expenditure is intentionally and reasonably made or incurred for the common safety for the purpose of preserving from peril the property involved in a common maritime adventure.¹
This definition highlights the shift from purely physical damage (sacrifice) to financial costs (expenditure), both of which can qualify for contribution from the other parties.
III. The Essential Elements of a General Average Act
For a loss to be classified as general average, several strict legal criteria must be met. These ‘tests’ ensure that the principle is not abused to cover the costs of ordinary wear and tear or poor ship management.
3.1 Common Peril
The danger must be real, substantial, and threaten the entire ‘adventure’—meaning the ship, the cargo, and the freight. It cannot be a mere apprehension of danger. For example, if a master seeks a port of refuge because he fears a storm might come, that may not qualify. However, if the ship’s engine fails in the middle of a busy shipping lane, leaving it adrift and at risk of collision, a common peril clearly exists.
3.2 Voluntary and Intentional Act
There must be a deliberate human intervention. If a storm washes a container overboard, that is a ‘peril of the sea’ and is considered a particular average loss for that cargo owner. Conversely, if the master orders the jettison (throwing overboard) of specific heavy containers to lighten a grounded vessel so it can float free, that is a voluntary sacrifice.
3.3 Extraordinary Nature
The sacrifice or expenditure must be extraordinary. Using the ship’s engines to navigate through heavy weather is part of the shipowner’s standard duty. However, if the ship is grounded and the master runs the engines at such high intensity to pull the ship off the sand that the engines are destroyed, that damage constitutes an extraordinary sacrifice compensable under general average.²
3.4 Success: The Requirement of Preservation
The sacrifice must result in the saving of the adventure. If the master jettisons half the cargo but the ship sinks an hour later regardless, there is no common benefit. Because nothing was saved, there is no fund from which to pay out contributions.
Landmark Jurisprudence: Birkley v Presgrave
To understand the logic of this law, one must look to the foundational case of Birkley v Presgrave (1801).³ In this case, the master of a ship cut the vessel’s cable and sacrificed an anchor to prevent the ship from drifting onto rocks during a gale.
The court held that because these items were sacrificed for the preservation of the whole adventure, the cargo owners were liable to contribute. Lord Kenyon famously stated that ‘all loss which arises in consequence of extraordinary sacrifices made, or expenses incurred, for the preservation of the ship and cargo, come within general average’. This case established that the law would look beyond the literal act of throwing goods overboard and include the destruction of the ship’s own equipment if done for the common good.
The Process of Adjustment and Calculation
Once a general average act is declared, the process of adjustment begins. This is a complex accounting task performed by an average adjuster. The objective is to ensure that the party whose property was sacrificed is neither better nor worse off than those whose property was saved. The adjuster calculates the contributory value of all property on board at the end of the voyage. This includes the value of the ship, the value of the cargo, and the freight at risk.
The contribution is calculated using the following mathematical logic:
Value of the specific interest
Contribution = _____________________________ × Total General Average loss Total value of all contributing interest
Fault and the ‘Unseaworthiness’ Defence
A frequent source of dispute is whether a party may claim general average if it was responsible for the danger. If a shipowner fails to maintain the vessel and the engine fails due to unseaworthiness at the commencement of the voyage, can the shipowner still require the cargo owners to contribute to the resulting towage costs?
Under Rule D of the York-Antwerp Rules, the right to contribution exists even where the peril was caused by the fault of one of the parties. However, this is a procedural right only. Cargo interests may still bring a separate claim for breach of the contract of carriage. In practice, allegations of unseaworthiness frequently lead cargo owners to refuse payment, resulting in complex and high-value litigation.⁴
VII. Modern Challenges: The Era of the Mega-Ship
The principle of general average was developed for relatively small wooden sailing vessels. In contrast, modern container ships such as the Ever Given carry over 20,000 containers belonging to thousands of cargo interests. When the Ever Given became grounded in the Suez Canal in 2021, the shipowners declared general average.⁵
This declaration triggered significant logistical disruption. Before cargo could be released, each cargo owner was required to provide a general average bond. The incident demonstrates the crucial role of marine insurance in modern commerce; without insurance, even small traders risk having their goods detained under a maritime lien until a substantial cash security is provided for losses they did not personally cause.
VIII. Conclusion
General average remains one of the most enduring and equitable doctrines in maritime law. It reflects the unique risks of the maritime environment, where the survival of the many may depend upon the sacrifice of the few. Although the scale of modern shipping has made the administration of general average more complex, the underlying principle of collective responsibility remains vital. It enables masters to take decisive action in moments of crisis without being paralysed by concerns over individual liability.
Primary Sources
York-Antwerp Rules 2016
Birkley v Presgrave (1801) 1 East 220
Secondary Sources
Rose FD, General Average: Law and Practice (2nd edn, LLP 2005)
Lowndes R and Rudolf GR, The Law of General Average and the York-Antwerp Rules (15th edn, Sweet & Maxwell 2018)
Wilson JF, Carriage of Goods by Sea (7th edn, Pearson 2010)
‘The Ever Given: A General Average Tale’ (2021) 12 Maritime Law Journal 45 ________________________________________
Footnote(S):
- York-Antwerp Rules 2016, Rule A.
- FD Rose, General Average: Law and Practice (2nd edn, LLP 2005) 88. 3. Birkley v Presgrave (1801) 1 East 220.
- JF Wilson, Carriage of Goods by Sea (7th edn, Pearson 2010) 255.
- ‘The Ever Given: A General Average Tale’ (2021) 12 Maritime Law Journal 45.
