Maritime Glossary: 50 Essential Terms Every Maritime Professional Should Know

Why a maritime glossary matters

Maritime terminology can be highly specialized. A shared vocabulary helps professionals communicate across shipboard, shore-based, regulatory and training environments.

Core terms

• STCW: International standards for seafarer training, certification and watchkeeping.
• SOLAS: International Convention for the Safety of Life at Sea.
• MARPOL: International convention addressing pollution from ships.
• PSC: Port State Control inspection of foreign ships in port.
• Flag State: The State whose flag a ship is entitled to fly and whose administration performs relevant regulatory functions.
• ISM Code: International Safety Management framework for safe management and operation of ships and pollution prevention.
• SMS: Safety Management System.
• DOC: Document of Compliance issued under the ISM framework.
• SMC: Safety Management Certificate.
• COC: Certificate of Competency.
• COP: Certificate of Proficiency.
• ECDIS: Electronic Chart Display and Information System.
• GMDSS: Global Maritime Distress and Safety System.
• BRM: Bridge Resource Management.
• ERM: Engine-room Resource Management.
• Human Element: The interaction of people with technology, procedures and organizational systems.
• Near Miss: An event that could have caused harm but did not.
• Corrective Action: Action taken to address an identified nonconformity or weakness.
• Root Cause: An underlying reason that allowed a problem to occur.
• Risk Assessment: Structured evaluation of hazards, likelihood, consequences and controls.
• Competence: Demonstrated ability to perform a task to a required standard.
• Revalidation: A process through which a certificate remains valid under applicable requirements.
• Endorsement: Official evidence attached to or associated with a certificate for a defined purpose.
• Recognition: Acceptance by a competent authority of a certificate, training or qualification under applicable rules.
• Maritime Administration: Government authority responsible for relevant maritime regulatory and certification functions.
• ISM: International Safety Management.
• IMSAS: IMO Member State Audit Scheme.
• IMO: International Maritime Organization.
• MSC: IMO Maritime Safety Committee.
• MASS: Maritime Autonomous Surface Ships.
• Cyber Risk: Risk arising from digital systems, connectivity and cyber threats.
• Drill: Planned exercise used to practice emergency or operational response.
• Familiarization: Process of ensuring personnel understand relevant ship, equipment or company procedures.
• Watchkeeping: Organized duty arrangements for maintaining safe navigation and operation.
• Seafarer: Person working in a capacity associated with shipboard operations, subject to applicable definitions.
• Shipowner: Entity that owns a ship, subject to the legal and commercial structure involved.
• Operator: Entity responsible for specified operational or management functions.
• Training Needs Analysis: Structured identification of competence gaps and learning requirements.
• Assessment: Process used to determine whether competence or learning outcomes have been achieved.
• Quality Assurance: Systematic controls used to maintain and improve programme or operational quality.
• Audit: Systematic, documented and objective evaluation against defined criteria.
• Inspection: Examination of a ship, equipment, records or practices against applicable requirements.
• Nonconformity: Failure to meet a specified requirement.
• Observation: A noted condition that may require attention, depending on the inspection or audit framework.
• Safety Culture: Shared attitudes and behaviors concerning safety and learning.
• Operational Readiness: Ability of people, equipment, procedures and documentation to perform as intended.
• Maritime Education: Education and training supporting maritime knowledge, skills and competence.
• Continuous Improvement: Ongoing process of learning, correction and enhancement.

Related Maritime Insights