Sea freight moves more than 90 percent of the global cargo. All the food you eat, all the fuel you use, and all the smartphones that come to your table were at some time shipped over a commercial vessel (Ship). Those who facilitate this global flow are the members of the merchant navy, and to most upcoming professionals pursuing a career in merchant navy, being employed in the middle of the international trade and sea transportation.
A career in the merchant navy is not like any other. It provides a unique blend of international travel, outstanding earning potential, and a well-defined career path from deck cadet to captain. It is one of the most fulfilling options for Indian students who are interested in international trade and the sea.
Everything you need to know about the merchant navy is covered in this guide, including what it is, how its ranks and roles operate, how to begin a career in it after the 12th grade, and why it still draws thousands of aspirational young professionals each year.
What Is the Merchant Navy and How Does a Career in Merchant Navy Work?
Merchant navy or Merchant Marine is a country fleet of commercial ships that carry goods, raw materials, and cargo in the open oceans. The merchant navy is a civilian occupation as compared to the Indian Navy which is a military service whose sole aim is world trade and commerce.
The name itself is a distinguished one. King George V coined it to commemorate British merchant ships which served in the First World War – a credit to the importance of civilian seafarers in maintaining the war. Nowadays, each of the major maritime countries has its merchant fleet used by thousands of talented specialists, working in the fields of navigation and engineering as well as catering and communications.
The first step towards a career in merchant navy is learning what merchant navy is and how it functions since this cannot be considered as a job only. It is a career that puts you in the center of the world trade, as you work in ships that unite the world and economies.
Career in Merchant Navy: Ranks and Roles — Complete Department Breakdown
The merchant navy ranking system is categorized into Deck, Engine, and Catering divisions. Understanding what is the work of merchant navy involves recognizing the teamwork required in each department to ensure smooth operations aboard.
Here is a quick-reference overview before the detailed breakdown:
| Department | Top Rank | Entry Rank | Core Function |
|---|---|---|---|
| Deck | Captain (Master) | Deck Cadet | Navigation, cargo, safety |
| Engine | Chief Engineer | Engine Cadet / 5th Engineer | Machinery, propulsion, power |
| Catering | Chief Cook / Catering Officer | Trainee Cook / Steward | Food, hospitality, crew welfare |
The Captain (Master)
The Captain is the most superior authority of any merchant vessel. The Captain is in charge of all the departments and has the overall legal and operational accountability of the ship, its cargo, its crew and adherence to the international maritime regulations. The career ambition of every officer within the merchant navy is all directed towards the position.
Deck Department
The Deck department is responsible for navigation, cargo management, and the overall safety of the vessel.
Chief Officer (First Mate):
The second-in-command on board. The Chief Officer works directly alongside the Captain, oversees all deck operations, manages cargo loading and discharge, and ensures crew welfare and safety compliance.
Second Officer (Second Mate):
Acts as the primary navigation officer, responsible for chart corrections, voyage planning, and medical officer duties onboard. The Second Officer stands independent navigational watches and is critical to safe passage.
Third Officer (Third Mate):
Responsible for all life-saving and firefighting equipment onboard. Also manages port documentation and handles the bond store. A key safety officer aboard every vessel.
Deck Cadets:
Trainee officers who have recently completed their B.Sc. Nautical Science program. Deck cadets work under senior merchant navy officers gaining the sea time and practical experience needed to appear for their Certificate of Competency (CoC) examinations(CoC is an official document that confirms that a particular person has the skills, knowledge, and training required to carry out particular duties safely and professionally.).
The career progression in the Deck department follows a clear, examination-based path:
Deck Cadet → Third Officer → Second Officer → Chief Officer → Captain
Each promotion requires completion of mandatory sea time at the current rank and successful clearing of the relevant CoC examination — making the merchant navy career one of the most merit-based professions available.
Most nautical science students begin their journey pursuing a career in merchant navy as deck cadets. They receive their CoC, or certificate of competency, upon completing the required sea service period and CoC examinations. With dedication and experience, deck cadets advance through ranks, successfully completing three CoC exams and fulfilling the requisite years of service at each position. This structured career path in the merchant navy ultimately leads to the prestigious role of the ship’s captain, making it a rewarding and goal-oriented profession for aspiring seafarers.
Deck Ratings (Non-Officer)
| Role | Responsibility |
|---|---|
| Bosun | Head of ratings division; executes work assigned by Chief Officer |
| Able Seaman | Supports deck operations; holds a merchant mariner’s document |
| Ordinary Seaman | Maintenance tasks – cleaning, painting, repairs; supports cargo operations |
Engine Department
The Engine department maintains and operates all machinery, propulsion systems, and power generation onboard.
Chief Engineer
Leads the entire engineering team. The Chief Engineer is responsible for all machinery maintenance, fuel management, and the technical operation of the vessel. This is the engine department’s equivalent of the Captain in terms of seniority and responsibility.
Second Engineer
Reports directly to the Chief Engineer. Supervises the engine room, delegates tasks to the crew, and manages day-to-day engineering operations.
Third Engineer
Supports the Second Engineer and ensures the proper functioning of all onboard machinery systems including boilers, pumps, and auxiliary systems.
Fourth Engineer
Manages spare parts inventory, oversees bunkering systems, and maintains operational logs — a critical administrative and technical role.
Fifth Engineer
An entry-level trainee engineer who assists during watch duty and progressively takes on responsibilities to earn certification.
Engine Ratings (Non-Officer)
| Role | Responsibility |
|---|---|
| Fitter | Mechanical maintenance and repair work |
| Motorman | Assists engineers in operating machinery |
| Wiper | Engine room cleaning and basic maintenance |
| Trainee Fitter / Wiper | Entry-level support roles |
The merchant navy is an excellent career option for everyone who loves the sea, is fascinated by a highly organized, well-structured field of work and is in reasonable health. A career in merchant navy is a highly paid and exceedingly lucrative option for everyone.
How to Start a Career in Merchant Navy After 12th
A career in merchant navy after 12th is one of the most direct and structured professional pathways available to Indian students. Here is exactly how it works:
Step 1 — Complete Class 12 with the Right Subjects
For the Deck department (navigation route): Science stream with Physics, Chemistry, and Mathematics (PCM) is required. For the Engine department (engineering route): PCM is equally important, and a Marine Engineering degree or Diploma is the typical entry path.
Step 2 — Enroll in a Recognized Maritime Program
The most direct entry route for the Deck department is a 3-year B.Sc. in Nautical Science from a DGS-approved institution. This degree includes a mandatory 12-month onboard internship on merchant ships, providing real sea-time experience before graduation.
Step 3 — Join as a Deck Cadet or Engine Cadet
Upon completing the degree, graduates join a shipping company as Deck Cadets or Engine Cadets — the official starting rank for all officers in their respective departments.
Step 4 — Accumulate Sea Time and Clear CoC Examinations
Career progression in the merchant navy is entirely merit-based. Each promotion — from Third Officer to Second Officer to Chief Officer to Captain — requires a fixed amount of sea time at the current rank and successful completion of the Certificate of Competency (CoC) examination for the next rank.
Typical Deck Officer Career Timeline:
| Stage | Rank | Time Required |
|---|---|---|
| Entry | Deck Cadet | Post B.Sc. Nautical Science |
| Promotion 1 | Third Officer | 12–18 months sea time + CoC Exam |
| Promotion 2 | Second Officer | 2–3 years + CoC Exam |
| Promotion 3 | Chief Officer | 5–7 years + CoC Exam |
| Final Goal | Captain (Master) | 12–15+ years + Master CoC |
Also Read: All about Merchant Navy Scope, Syllabus, Subjects, Fees
Is Merchant Navy a Good Career? — Final Thoughts
Merchant navy is one of the best jobs, which students in India today can best pursue provided they have the pre-qualifications in science and are willing to work in the sea as they seek a profession that is more globalized, better paid, and has a clear leadership ladder.
The career requires a sense of discipline, technical expertise and ability to act under pressure. However, in exchange, it can provide something that most careers cannot that is, the opportunity to literally travel the world, and at the same time, have a highly respected and financially gratifying career.
You want to become a merchant navy officer, you want to become a Chief Engineer or you want to become a Captain, either way, the career trajectory is obvious, the benchmarks exist and the possibilities are literally worldwide.
You are willing to start your merchant navy career prior to 12th, the implementation of a B.Sc. Nautical Science course in an institution that is accredited by DGS is where you will begin.
