Maritime transportation constitutes one of the most important mechanisms of the global economic system. A substantial portion of international trade is conducted through maritime shipping. Business activities related to navigation, cargo transportation, marine insurance, and the liabilities of transport operators are governed by the framework of Maritime Law (also referred to as Admiralty Law).
Under Thai law, legal rules concerning navigation and maritime transportation are contained in several statutes, including:
- the Civil and Commercial Code,
- the Navigation in Thai Waters Act,
- the Carriage of Goods by Sea Act, and
- various international legal frameworks governing maritime transport and multimodal transportation.
Maritime law therefore plays a crucial role in defining the rights, obligations, and liabilities of parties involved in maritime navigation and international trade.
Definition of Maritime Law
Maritime law refers to the body of law governing commercial activities related to navigation and maritime transportation, including the rights and obligations of the parties involved in such activities. Key parties in maritime commerce include the following
Shipowner
A shipowner refers to a natural or juristic person who owns a vessel and has the right to possess or operate the vessel for commercial purposes. Shipowners play a central role in maritime operations and are generally responsible for ensuring that the vessel is seaworthy, including maintaining the vessel, employing crew members, and complying with applicable maritime safety regulations.
From a legal perspective, shipowners may be held liable for damages arising from the operation of the vessel, such as damage to cargo, maritime accidents, or damage to third parties. Such liability may arise directly or through agents acting on behalf of the shipowner, such as the ship’s master or crew members.
Charterer
A charterer refers to a person or legal entity that enters into a charter agreement with a shipowner to use the vessel for transporting cargo. A charter agreement (Charterparty) may take several forms, including:
- Voyage Charter – chartering a vessel for a single voyage
- Time Charter – chartering a vessel for a specified period of time
- Bareboat Charter – chartering a vessel where the charterer assumes full control and management of the vessel
In certain cases, particularly under a Bareboat Charter, the charterer may assume responsibilities similar to those of the shipowner, including hiring the crew, managing the vessel, and bearing operational risks.
Shipper
A shipper refers to a natural or juristic person who delivers goods to the carrier for transportation by sea to a designated destination.
Key obligations of the shipper include:
- delivering cargo consistent with the shipping documentation,
- properly packing the goods to prevent damage during transport, and
- providing accurate information regarding the nature of the goods, particularly where dangerous goods are involved.
In legal practice, the shipper is typically entitled to receive a Bill of Lading, which serves as evidence that the carrier has received the goods for transportation.
Consignee
A consignee refers to the person or legal entity entitled to receive the cargo from the carrier at the port of destination. This right is typically identified in the Bill of Lading or other transport documents.
The consignee has the right to claim delivery of the goods upon arrival of the vessel. In cases where goods are lost or damaged, the consignee may have the right to claim compensation from the carrier or other responsible parties in accordance with the contract of carriage and applicable law.
Marine Insurance Company
A marine insurance company refers to a legal entity engaged in the business of providing insurance coverage for risks associated with maritime activities, including navigation, cargo transportation, and the legal liabilities of maritime operators.
Marine insurance functions as a critical risk allocation mechanism within the maritime industry because maritime transportation involves the movement of high-value assets across international routes and is exposed to both natural and human-related risks.
Marine insurance generally includes the following types:
1. Hull Insurance
Insurance covering damage to the vessel itself, including its machinery and equipment. This may include damage resulting from collision, grounding, or natural disasters.
2. Cargo Insurance
Insurance covering loss or damage to cargo transported by sea. This insurance is typically obtained by the shipper or consignee.
3. Protection and Indemnity (P&I) Insurance
Insurance covering the liability of shipowners to third parties, including:
- damage to other vessels
- damage to third-party property
- injury or death of crew members or other persons
- environmental damage
Marine insurance companies play a vital role in the maritime legal system by reducing economic risks in maritime transport and enabling international trade to operate with greater stability.
When a loss occurs, the insurer is responsible for paying indemnity to the insured in accordance with the terms of the insurance policy.
After indemnification, the insurer may exercise subrogation rights to pursue recovery from the party responsible for the loss, such as the shipowner, carrier, or other liable third parties.
Maritime Lien
A Maritime Lien refers to a special legal right allowing certain creditors to enforce claims directly against a vessel. This right attaches to the vessel itself (right in rem) and continues to exist even if ownership of the vessel changes.
Examples of claims that may give rise to a maritime lien include:
- crew wages
- salvage remuneration
- damage arising from vessel collisions
- port charges
- marine environmental damage
Creditors holding a maritime lien may petition the court for ship arrest and request judicial sale of the vessel to satisfy outstanding debts.
Structure of Maritime Law in Thailand
Unlike some jurisdictions that codify maritime law into a single comprehensive statute, Thailand regulates maritime activities through several separate laws covering both private law and public law aspects.
Key legislation includes:
- the Civil and Commercial Code,
- the Navigation in Thai Waters Act, and
- the Carriage of Goods by Sea Act.
Civil and Commercial Code
The Civil and Commercial Code establishes general principles governing legal relationships in civil and commercial matters, including transportation activities.
Although not specifically designed for maritime operations, several provisions are relevant to maritime transportation, particularly those concerning contracts of carriage, which regulate the rights and obligations of carriers and shippers.
The Code also provides general legal principles relating to:
- juristic acts and contracts
- tort liability
- property and proprietary rights
- obligations and debt settlement
These principles are frequently applied in resolving disputes related to maritime transportation.
Navigation in Thai Waters Act
The Navigation in Thai Waters Act is a public law statute aimed at regulating maritime navigation within Thai territorial waters.
The law establishes rules concerning:
- vessel registration and nationality
- qualifications and responsibilities of vessel operators
- maritime safety standards
- regulation of navigation routes and ports
- regulatory authority of state agencies, particularly the Marine Department
This legislation plays an important role in maintaining maritime safety and protecting life, property, and the marine environment.
Carriage of Goods by Sea Act
The Carriage of Goods by Sea Act is a specific statute governing the transportation of cargo by sea, which is a key element of international trade.
The Act regulates the rights and obligations of:
- carriers
- shippers
- consignees
It also governs the legal status of maritime transport documents, particularly the Bill of Lading, which functions as:
- evidence of the contract of carriage
- receipt of goods
- document of title
The Act also establishes rules concerning carrier liability, including circumstances under which carriers may limit their liability for cargo loss, damage, or delay.
Important Contracts in Maritime Law
Maritime commerce involves complex interactions among multiple stakeholders. As a result, several contractual arrangements are necessary to define the legal rights and obligations of the parties involved.
Key maritime contracts include:
- Contracts of Carriage of Goods by Sea
- Charterparty Agreements
- Marine Insurance Contracts
Liability of the Maritime Carrier
Under maritime law, carriers bear several fundamental obligations in transporting cargo.
These obligations include:
Seaworthiness
Carriers must exercise due diligence to ensure that the vessel is seaworthy before and at the beginning of the voyage.
Proper Care of Cargo
Carriers must properly load, handle, stow, carry, keep, and discharge cargo with reasonable care.
Delivery of Cargo
Carriers must deliver cargo to the designated port and to the party entitled to receive the goods under the Bill of Lading.
However, carriers may be exempt from liability in certain circumstances, such as:
- Perils of the Sea (e.g., severe storms or unforeseeable maritime hazards)
- Force Majeure
- Fault of the Shipper, such as improper packaging or inaccurate cargo information.
These legal principles aim to balance the protection of cargo owners with the commercial risks faced by maritime operators.
Importance of Maritime Law in International Trade
Maritime law plays a critical role in the global economic system because the majority of international trade relies on maritime transportation.
Large volumes of goods, including raw materials, energy resources, industrial goods, and consumer products, are transported across international waters.
A well-structured maritime legal framework provides:
- legal certainty for commercial actors
- risk management mechanisms
- efficient dispute resolution procedures
Such mechanisms strengthen confidence among businesses, investors, and financial institutions engaged in international trade.
Legal Analysis: Thai Vessel Attacked in the Strait of Hormuz
The Strait of Hormuz is one of the most strategically important maritime chokepoints in the world, serving as a major route for the transportation of oil and natural gas from the Persian Gulf to global markets.
Under international law, particularly the United Nations Convention on the Law of the Sea (UNCLOS), the Strait of Hormuz is classified as a strait used for international navigation, where vessels enjoy the right of transit passage.
If a Thai-flagged vessel is attacked in this area, several legal issues arise:
State Responsibility
If the attack is attributable to a state, it may constitute an internationally wrongful act, potentially triggering diplomatic claims and compensation.
Non-State Actors
If the attack is carried out by non-state armed groups, questions may arise regarding the due diligence obligations of coastal states.
Maritime Contractual Liability
Legal analysis may involve examining:
- carrier liability under the contract of carriage
- terms of the Bill of Lading
- contractual exceptions such as:
• Act of War
• Hostilities or Armed Conflict
• Perils of the Sea
Marine Insurance
Losses may be covered under:
- Hull Insurance
- Cargo Insurance
- War Risk Insurance
- Protection and Indemnity (P&I) Insurance
Insurers may subsequently exercise subrogation rights against responsible parties.
Conclusion
Maritime law is a vital branch of commercial law that governs business activities related to maritime navigation and transportation.
For Thailand, understanding maritime law is essential for businesses involved in logistics, shipping, and international trade.
Effective maritime legal regulation strengthens Thailand’s competitiveness in the global economy and enhances confidence among international investors and commercial actors.
Disclaimer
This article is prepared for general informational purposes only and does not constitute legal advice. The information contained herein may not be exhaustive and may not reflect the most current legal developments. Readers should not rely on this article as a substitute for professional legal advice, which must be provided based on the specific facts and circumstances of each case. Publication or use of this article does not create a lawyer–client relationship. All rights reserved under the Copyright Act B.E. 2537 (1994).
Author: Pinprapus Chartikavanich
Date: 12 March 2026