Navigating Up the Ranks

A career at sea combines professional responsibility, continuous learning and the opportunity to support global trade. More than 80% of global trade is transported by sea, and safe vessel operations depend on well-trained deck officers responsible for navigation, watchkeeping and the safe movement of vessels and cargoes.

Progressing from cadetship to command requires more than sea service alone. It involves structured training, qualifying sea service and competency assessments governed by international standards, including the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers (STCW).

For deck officers, career progression involves a series of competency milestones, simulator-based training programmes and certification requirements. The journey typically includes the Second Mate Course, specialised training in ROSC, ARPA and ECDIS, and progressively greater operational responsibility onboard. Together, these help develop the technical competence, confidence and judgement required for a successful maritime career.

The Second Mate Course: The First Major Milestone

The transition from cadet to qualified deck officer involves completing the required training, sea service and assessments, including the Second Mate Course. This competency-focused programme helps prepare cadets to move from supervised training towards professional watchkeeping responsibilities.

Progression pathway

Deck Cadet

Required qualifying sea service and approved training

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Second Mate Course, ROSC, ARPA, ECDIS, GMDSS and required examinations

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Officer of the Watch (OOW)

Relevance to career progression

The Second Mate Certificate of Competency (CoC) qualifies an officer to serve as an Officer of the Watch (OOW), subject to applicable certification requirements. The officer assumes responsibility for navigational watchkeeping, vessel safety and relevant operational duties during designated watch periods.

This marks a significant milestone in a deck officer’s career, establishing the foundation for greater independence and responsibility onboard.

General eligibility requirements

Specific requirements vary according to the applicable maritime administration and approved training pathway. Common requirements include:

• Qualifying sea service: Completion of the prescribed period of structured shipboard training as a deck cadet.
• Bridge watchkeeping experience: Documented training and practical experience in bridge duties and navigational watchkeeping.
• STCW safety certification: Required safety training and certificates, including relevant firefighting, medical first aid, survival craft and personal survival competencies.

Specialised navigation training 

Radar Observer and Simulator Course (ROSC)

ROSC develops an officer’s understanding of radar operation, capabilities and limitations. It helps build the ability to interpret radar information accurately and use it effectively as part of safe navigation.

Automatic Radar Plotting Aids (ARPA)

ARPA training develops the skills required to assess surrounding vessel traffic, track targets and support collision avoidance through automated radar information and trial manoeuvre functions.

Electronic Chart Display and Information System (ECDIS)

ECDIS training develops competency in digital navigation, route planning and route monitoring. The system presents electronic chart information alongside relevant navigational data and can provide safety alarms and decision-support functions. Applicable training requirements include generic ECDIS training and, where required, familiarisation with the specific equipment installed onboard.

Together, these competencies help officers navigate safely, interpret information from multiple sources and make informed decisions in increasingly technology-driven operating environments.

Bridge Team Management: Building Leadership at Sea

As officers progress towards senior positions, technical expertise must be supported by leadership, communication and effective decision-making. Bridge Team Management (BTM), Bridge Resource Management (BRM) and Bridge Team and Resource Management (BTRM) training address these essential capabilities.

Relevance to career progression

Maritime incidents can involve human factors, including communication failures, reduced situational awareness and poor decision-making. Bridge simulator exercises help officers practise managing complex scenarios, coordinating teams and responding effectively under pressure.

This training supports the development of skills needed for senior operational responsibilities and eventual progression towards command.

Key competencies developed

• Situational awareness: Maintaining a clear understanding of vessel position, surrounding traffic and operational risks.
• Risk recognition and intervention: Identifying emerging hazards and taking appropriate action before incidents develop.
• Effective communication: Using clear, structured communication to improve bridge team coordination.
• Resource management: Managing people, information and workload effectively during demanding operations.
• Decision-making: Evaluating available information and responding confidently to changing conditions.

Understanding the Deck Officer Progression Pathway

A deck officer’s career typically progresses through successive stages of sea service, competency training and certification.

Phase 1: Cadetship

Structured training at sea, completion of the training record book, relevant safety certification and required navigation courses.

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Second Mate Certificate of Competency

Achievement of the required qualifications and assessments to serve as an Officer of the Watch.

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Phase 2: Operational Ranks

Service as a Third Officer or Second Officer, gaining practical experience and completing the additional requirements for progression.

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Chief Mate Certificate of Competency

Completion of the prescribed sea service, training and assessments for senior deck officer responsibilities.

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Phase 3: Senior Management and Command

Service as Chief Officer, continued professional development and completion of the applicable requirements for command.

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Master Mariner Certificate of Competency

Qualification for command, subject to the applicable certification and service requirements.

The precise sequence, qualifying sea service and certification requirements depend on the relevant maritime administration and approved training pathway.

The Horizon Ahead

The progression pathway for a deck officer is demanding, but it is designed to build competence, confidence and professional responsibility at every stage.

Courses such as the Second Mate Course, ROSC, ARPA, ECDIS and BTM/BTRM help officers develop the technical knowledge, operational understanding and judgement required to manage increasingly complex vessels and operating environments.

These qualifications go beyond meeting regulatory requirements. They support better decision-making, effective risk management, the protection of lives and safe, reliable vessel operations.

For those committed to continuous learning and gaining practical sea experience, the pathway offers opportunities to take on greater responsibilities throughout their careers, ultimately progressing towards command as a Master Mariner.

This article is authored by Capt. Ashish Chandra, Head of Department- Post Sea Nauticals, IMI