52 Terms You Need to Know in the World of Ship Buying and Selling

52 Terms You Need to Know in the World of Ship Buying and Selling

The world of ship buying and selling can feel like navigating uncharted waters if you’re not familiar with the terminology. From legal jargon to technical specifications, understanding these key terms is crucial for making informed decisions, whether you’re purchasing a vessel or selling one. This guide breaks down 52 must-know terms to help you sail smoothly through the process.


1. Bill of Sale 📜⚓

A legal document that transfers ownership of the vessel from the seller to the buyer.

  • Why it’s important: It serves as proof of ownership and is required for registration.
  • When you’ll see it: At the closing stage of the transaction.

2. Surveyor 🧐🛠️

A professional who inspects the ship to assess its condition and value.

  • Why it’s important: Ensures the buyer knows the vessel’s true state before purchase.
  • Pro tip: Always hire an independent, certified surveyor for unbiased results.

3. Dry Docking 🛳️🔧

The process of taking a ship out of the water for inspection, maintenance, or repairs.

  • Why it’s important: Essential for evaluating the ship’s hull and underwater components.
  • When it happens: Typically during pre-purchase inspections or routine maintenance.

4. Class Certificate 🏢✅

A document issued by a classification society indicating the ship meets specific safety and technical standards.

  • Why it’s important: Required for legal operation and resale value.
  • Tip: Check the certificate’s expiration date and compliance status.

5. Flag State 🚩🌎

The country under whose laws the ship is registered and operates.

  • Why it’s important: Determines the legal and regulatory framework for the ship.
  • Example: Panama, Liberia, and Marshall Islands are popular flag states for their favorable regulations.

6. Charter Party 📄🚢

A contract between the shipowner and charterer outlining the terms of vessel use.

  • Why it’s important: Essential for understanding liabilities and responsibilities during chartering.
  • Key types: Time charter, voyage charter, and bareboat charter.

7. Broker 🤝🛒

A professional intermediary who facilitates the buying or selling of ships.

  • Why it’s important: They help navigate negotiations, pricing, and paperwork.
  • Tip: Choose a broker with industry experience and a solid reputation.

8. P&I Club (Protection and Indemnity Club) 🛡️💼

An insurance organization providing liability coverage for shipowners and operators.

  • Why it’s important: Protects against third-party claims, such as cargo damage or crew injury.
  • What to check: Ensure the ship’s P&I coverage is up to date before purchase.

9. Deadweight Tonnage (DWT) ⚖️⚓

The maximum weight a ship can safely carry, including cargo, fuel, and crew.

  • Why it’s important: Determines the ship’s carrying capacity and suitability for your needs.
  • How to use it: Compare DWT across similar vessels to evaluate efficiency.

10. Memorandum of Agreement (MOA) ✍️📋

A preliminary agreement outlining the terms and conditions of the ship sale.

  • Why it’s important: Sets the stage for the transaction, including price and inspection terms.
  • When it’s signed: After initial negotiations but before the final closing.

11. Hull Identification Number (HIN) 🔢🚢

A unique 12- or 14-character number assigned to the ship’s hull.

  • Why it’s important: Verifies the ship’s identity and history.
  • Where to find it: Usually engraved on the hull or displayed on official documentation.

12. Ship Registry 📚🇺🇳

A database maintained by a flag state that documents ship ownership and legal status.

  • Why it’s important: Ensures the vessel complies with international maritime regulations.
  • Example: Popular registries include the British Registry and Panama Registry.

13. Lien ⚖️💰

A legal claim against the ship due to unpaid debts or obligations.

  • Why it’s important: Liens must be cleared before completing a sale.
  • Tip: Conduct a lien search during the due diligence process.

14. Ballast ⚓🌊

Water or other materials added to the ship for stability during navigation.

  • Why it’s important: Affects the ship’s draft and balance, especially when not carrying cargo.
  • Pro tip: Inspect ballast systems for compliance with environmental regulations.

15. Cargo Capacity 📦⚖️

The volume or weight a ship can safely transport.

  • Why it’s important: Determines whether the ship is suitable for your operational needs.
  • How it’s measured: Typically in cubic meters (m³) or tons, depending on cargo type.

16. Sea Trials 🚤🌊

Test runs conducted to evaluate the ship’s performance and condition in real-world conditions.

  • Why it’s important: Verifies that the ship meets specifications and functions properly.
  • When to schedule: After surveys but before finalizing the purchase.

17. Salvage Value 💎⛵

The estimated residual value of the ship if sold for parts or scrap.

  • Why it’s important: Helps calculate financial risks and long-term returns.
  • Example: Aging ships nearing the end of service often sell at salvage value.

18. International Maritime Organization (IMO) Number 🔒🌐

A unique identifier for ships used to enhance maritime safety and security.

  • Why it’s important: Tracks the ship’s operational history and compliance status.
  • Where to check: The IMO database or ship documentation.

19. Gross Tonnage (GT) ⚖️📏

The total internal volume of a ship, including all enclosed spaces.

  • Why it’s important: Used for registration, port fees, and safety regulations.
  • How it differs from DWT: GT measures volume, while DWT measures weight capacity.

20. Class Society 🏛️✔️

An organization that establishes and verifies technical standards for ships.

  • Why it’s important: Certification from a class society impacts the ship’s resale value and operational eligibility.
  • Examples: Lloyd’s Register, ABS (American Bureau of Shipping), and DNV (Det Norske Veritas).

21. Charter Rate 💵📊

The price paid by a charterer to lease a vessel.

  • Why it’s important: Determines profitability for the shipowner and affordability for the charterer.
  • What affects it: Vessel type, route, duration, and market demand.

22. Laytime ⏳🛳️

The agreed amount of time allowed for loading or unloading cargo.

  • Why it’s important: Exceeding laytime can lead to demurrage charges.
  • How it’s negotiated: Defined in the charter party agreement.

23. Demurrage 💰❌

A penalty fee charged for exceeding the agreed laytime.

  • Why it’s important: It impacts overall shipping costs and operational efficiency.
  • Tip: Ensure clear terms in the charter contract to avoid disputes.

24. Freight Forwarder 🚛📦

A company that arranges the shipment of goods on behalf of the cargo owner.

  • Why it’s important: Acts as an intermediary to simplify logistics and documentation.
  • Pro tip: Choose a reputable forwarder with maritime experience for smoother transactions.

25. Shipbroker 📞📈

A specialist who negotiates the buying, selling, or chartering of ships.

  • Why it’s important: They provide market insights and facilitate complex transactions.
  • How they help: By ensuring fair deals and managing negotiations.

26. As-Is Condition 🛠️⚓

A term used in ship sales indicating the vessel is sold without repairs or warranties.

  • Why it’s important: Buyers take full responsibility for the ship’s current condition.
  • Pro tip: Conduct thorough inspections before agreeing to as-is sales.

27. Port State Control (PSC) 🇺🇳🔍

Inspections conducted by authorities to ensure foreign ships comply with international regulations.

  • Why it’s important: Non-compliance can result in fines, delays, or detention.
  • Example: Ships must adhere to IMO and SOLAS standards during PSC inspections.

28. Ship Management Company 🏢🛳️

A company hired to handle the operational aspects of a vessel, including crew, maintenance, and compliance.

  • Why it’s important: Ensures smooth operations, especially for owners with large fleets.
  • Pro tip: Research management companies for specialization in your ship type.

29. Tonnage Tax 💸📜

A tax calculated based on the tonnage of a vessel rather than its income.

  • Why it’s important: Common in shipping-friendly jurisdictions as an incentive for shipowners.
  • Example: Countries like Greece and Singapore offer tonnage tax schemes.

30. Shipyard Warranty 🛠️🛡️

A guarantee provided by the shipyard for repairs or new constructions.

  • Why it’s important: Protects the buyer against defects or performance issues post-delivery.
  • Tip: Understand the duration and coverage of the warranty before finalizing a contract.

31. Deadweight Cargo 📦⚖️

The actual cargo weight a ship can carry, excluding fuel and crew.

  • Why it’s important: Helps determine how much profit a ship can generate based on its capacity.
  • What to look for: Compare deadweight with the ship’s total DWT (Deadweight Tonnage) to calculate operational efficiency.

32. Condition Survey 🧐🔍

A detailed examination of the ship’s condition to assess its value and seaworthiness.

  • Why it’s important: Essential for buyers to understand the current state of the ship before purchase.
  • Where it happens: Typically performed before negotiations to uncover any hidden issues.

33. Flag of Convenience 🚩🌍

A country where a ship is registered that may have more lenient regulations or lower operating costs.

  • Why it’s important: Allows shipowners to save on taxes, labor, and regulations, but can raise ethical concerns.
  • Popular flags: Panama, Liberia, and the Marshall Islands are common for commercial ships.

34. Keel ⚓🔧

The main structural component of a ship, running along the bottom from bow to stern.

  • Why it’s important: Provides stability and strength to the ship’s structure.
  • Key inspection point: Ensure the keel is free of cracks, corrosion, or other signs of damage.

35. Ballast Water 🌊⚠️

Water used to stabilize a ship during transit, especially when it’s not fully loaded with cargo.

  • Why it’s important: Incorrect ballast management can cause environmental and regulatory issues.
  • Regulations: The Ballast Water Management Convention sets guidelines for how ballast water should be treated and discharged.

36. Shipowner’s Liability 🛡️💼

Legal responsibility of the shipowner for damages caused by the vessel’s operation.

  • Why it’s important: Covers personal injury, cargo loss, and environmental damages.
  • What to consider: Ensure sufficient insurance coverage for potential liabilities.

37. Post-Panamax 🚢📏

Ships that are too large to fit through the original Panama Canal locks but can pass through the new, expanded locks.

  • Why it’s important: Offers more cargo space and efficiency for long-haul shipping.
  • Example: Post-Panamax vessels revolutionized the global container shipping industry with larger capacity.

38. Retrofitting 🛠️🔄

The process of upgrading an existing ship with new technology or systems.

  • Why it’s important: Helps extend the lifespan of older vessels and meet new environmental regulations.
  • Common retrofits: Upgrading engines for fuel efficiency, installing scrubbers to reduce emissions.

39. Suezmax 🚢🌍

The largest size a ship can be to transit the Suez Canal’s original locks.

  • Why it’s important: Determines the ship’s operational flexibility and access to major global shipping routes.
  • Limitations: Suezmax ships are constrained by the width and depth of the canal.

40. AIS (Automatic Identification System) 📡🚢

A system that uses transponders to automatically send and receive ship information, such as position, course, and speed.

  • Why it’s important: Crucial for collision avoidance, tracking, and maritime safety.
  • Where it’s required: On most commercial vessels, especially those over 300 tons.

41. Scrapping ⚒️🛳️

The process of dismantling and selling a ship for its raw materials at the end of its useful life.

  • Why it’s important: It determines the ship’s residual value and future financial returns.
  • Pro tip: Always verify the ship’s scrapping history before purchase to ensure it hasn’t been sold for scrap prematurely.

42. SOLAS (Safety of Life at Sea) 🛟🌊

An international treaty that ensures ships are safe to operate and equipped with necessary life-saving equipment.

  • Why it’s important: Compliance with SOLAS is mandatory for global trade and maritime safety.
  • Example: Every commercial ship must have lifeboats, fire extinguishers, and other safety measures according to SOLAS standards.

43. Port Congestion 🚢🛑

A situation where ships are delayed due to high traffic or operational bottlenecks at a port.

  • Why it’s important: Causes shipping delays, increased costs, and potentially impacts delivery schedules.
  • What to do: Monitor port schedules and plan shipments to avoid high-congestion periods.

44. Shipyard Delivery 🚢🔧

The process of receiving a newly built or refurbished vessel from the shipyard.

  • Why it’s important: A crucial step in the ship buying process, ensuring that the vessel meets all specifications and is operational.
  • Key check: Perform a final inspection before taking possession of the vessel.

45. Stowage Plan 📦📋

A detailed map outlining how cargo is to be loaded and arranged on a ship.

  • Why it’s important: Ensures safe and efficient transport, reducing the risk of cargo damage.
  • How it works: The plan takes into account the type of cargo, weight distribution, and access needs for unloading.

46. BIMCO (Baltic and International Maritime Council) ⚖️🌍

The largest international shipping association that drafts contracts and provides services to shipowners and operators.

  • Why it’s important: Offers standard contracts, guidelines, and resources for the maritime industry.
  • Example: BIMCO’s charter party and bill of lading templates are widely used across the industry.

47. IMO (International Maritime Organization) 🌐⚖️

A specialized agency of the United Nations responsible for regulating shipping safety, environmental concerns, and legal matters.

  • Why it’s important: The IMO sets global standards for shipping practices, ensuring safety and sustainability in international trade.
  • Example: The IMO’s MARPOL regulations address pollution prevention in maritime operations.

48. Shipowner’s Equity 💵📊

The amount of capital invested by the shipowner in the vessel, excluding loans and debts.

  • Why it’s important: Reflects the financial health of the shipowner and the potential return on investment.
  • What to calculate: Subtract the ship’s liabilities (e.g., loans) from its current market value.

49. Hold Inspection 👀🛳️

A thorough inspection of the ship’s holds (cargo spaces) to ensure they are clean, safe, and compliant with regulations.

  • Why it’s important: Essential for determining if the vessel is fit for carrying specific types of cargo.
  • When it happens: Typically before loading and unloading cargo, especially for specialized or sensitive goods.

50. Navigational Charts 🗺️⚓

Maps used by ship captains to plot routes, avoid hazards, and comply with maritime traffic regulations.

  • Why it’s important: Ensures safe navigation, particularly in unfamiliar waters or congested areas.
  • What to look for: Regularly updated charts to ensure accuracy and up-to-date information.

51. Maritime Liabilities Insurance 🛡️💼

Insurance coverage for shipowners against damages, injuries, or legal claims resulting from maritime activities.

  • Why it’s important: Protects against financial losses arising from accidents, collisions, or other legal issues.
  • What to consider: Ensure adequate coverage for personal injury, cargo loss, and environmental damage.

52. Ship Finance 💵⚓

The process of acquiring funds to purchase, lease, or operate a vessel, often through loans, equity, or bonds.

  • Why it’s important: Vital for shipowners and investors to secure funding for purchasing or maintaining vessels.
  • Common sources: Banks, private equity, and specialized ship financing institutions.

The world of ship buying and selling is complex and filled with specialized terms. Whether you’re a first-time buyer or an experienced seller, understanding these 52 key terms is essential for navigating the maritime industry successfully. With this knowledge, you can approach transactions with confidence and avoid common pitfalls in ship purchasing, selling, and management.