Merchant Navy Eligibility Criteria: Age, Height, Eyesight & Medical Fitness

More aspirants get stopped by medical fitness than by any exam. Every year, students clear entrance exams, pay course fees, and complete months of training — only to discover during their pre-employment medical exam that an eyesight or hearing issue they didn’t think twice about actually disqualifies them from sailing. This page exists so that doesn’t happen to you: it’s the one place to check every eligibility requirement — age, height, eyesight, medical fitness, and physical test — before you spend a rupee on any course.

If you haven’t decided on a course yet, read How to Join Merchant Navy first for the full path, or jump straight to Merchant Navy Career After 12th or Merchant Navy Career After 10th depending on your stage.

The One Thing to Do Before Anything Else

Get a pre-employment-style medical check-up with a DG Shipping-approved doctor before you enroll in any course, take any entrance exam, or pay any fee. This single step, costing a few hundred rupees, is the best money you’ll spend in your entire Merchant Navy application process — it can save you months of training and lakhs of rupees in fees if it surfaces a disqualifying issue early. Every requirement below is something a proper medical check will catch; don’t rely on self-assessment.

Age Limits

Age requirements vary by course and entry route, so check the specific course rather than assuming one number applies everywhere:

• GP Rating / NCV Rating (after 10th): generally 17–25 years.
• DNS / B.Sc Nautical Science (after 12th, deck track): generally 17–25 years.
• GME / B.Tech Marine Engineering / DME (after 12th, engine track): generally 17–25 years, with B.Tech’s longer duration meaning most candidates apply at the lower end of this range.
• Direct entry via IMU CET for degree programs typically follows the same broad band, though individual institutes can set slightly tighter limits.

Always confirm the exact age bracket on the specific institute’s current admission notification — these numbers are set by DG Shipping and the institute jointly and can shift slightly between cycles.

Educational Eligibility (Quick Reference)

• After 10th (GP Rating/NCV): Class 10 pass, no specific subject requirement.
• After 12th, officer track (DNS, B.Sc Nautical Science, GME, B.Tech Marine Engineering, DME, ETO): Class 12 pass with Physics, Chemistry, and Mathematics (PCM), typically 50–60% aggregate depending on the institute, plus a working proficiency in English.

Full course-by-course detail is on our Merchant Navy Courses After 12th page.

Height Requirement

Most DG Shipping-approved institutes set a minimum height around 150–157 cm, though this is one of the more flexible standards and varies by institute — some don’t enforce a strict minimum at all and instead assess overall physical fitness and BMI holistically. Height is rarely, on its own, a disqualifying factor unless it’s paired with other physical fitness concerns. Check the specific number for your target institute rather than assuming a single national standard.

Eyesight and Vision Standards

This is the single most common reason aspirants get disqualified, and it deserves the most attention here.

• Deck (navigation) roles: Require sharper uncorrected or correctable vision standards, since navigation depends heavily on distance vision, night vision, and depth perception. A common benchmark is 6/6 vision in the better eye and 6/9 in the other, correctable with glasses/lenses in many categories — but some navigation-critical certifications require better uncorrected vision than others.
• Engine room roles: Vision standards are somewhat more lenient than deck roles, since the work doesn’t depend as heavily on long-distance vision, though a baseline standard still applies.
• Colour vision: Normal colour vision is required across virtually all seafaring roles — navigation lights, signal flags, and safety indicators depend on accurate colour perception. Colour blindness (even mild) is one of the most common disqualifying findings and often isn’t something people realize they have until tested.
• Corrective surgery: Some categories permit LASIK or similar corrective procedures if performed well in advance of the medical exam and stabilized, but this varies by role and institute — never assume surgery alone solves an eyesight disqualification without confirming with a DG Shipping-approved doctor first.

If you wear glasses or have never had your colour vision formally tested, this is the first thing to check — before anything else on this page.

Medical Fitness: The Full Picture

DG Shipping’s medical fitness standards go well beyond eyesight. A qualifying medical exam checks:

• Cardiac health: No significant history of heart disease or uncontrolled hypertension.
• Respiratory health: No significant asthma, chronic respiratory conditions, or similar issues that could be dangerous in a confined, high-exertion, at-sea environment.
• Hearing: A functional hearing standard is required, since alarms, radio communication, and verbal instructions on a working ship depend on it. Significant hearing loss in either ear is typically disqualifying.
• Psychiatric history: Certain psychiatric conditions can be disqualifying, given the demands of extended isolation at sea and the safety-critical nature of shipboard roles. This is assessed as part of the standard medical exam, not through a separate screening.
• General fitness: No conditions requiring ongoing specialist treatment that would be difficult to manage at sea — diabetes requiring insulin, epilepsy, and similar conditions are commonly disqualifying, though standards and exceptions vary by case and role.
• BMI: A reasonable body mass index range is expected; being significantly under or overweight can affect eligibility and is assessed alongside overall physical fitness.
• Tattoos: Not a DG Shipping medical criterion, but worth flagging — some shipping companies have their own policies restricting visible tattoos, particularly for candidate-facing or uniform-visible roles. This varies by company, not by regulation, so check with your target employer rather than assuming a blanket rule either way.

The Physical Fitness Test

Beyond the medical exam itself, most institutes and the pre-sea training process include a physical fitness assessment covering basic strength, stamina, and mobility — the kind of general fitness needed to handle physically demanding shipboard tasks, climb ladders and stairways repeatedly, and work safely in a moving, sometimes cramped environment. This isn’t typically an elite athletic standard, but a baseline of general fitness matters, and it’s worth being in reasonably good physical condition heading into training rather than starting from zero.

Swimming is a related, separate requirement at most institutes — basic swimming competency is expected either before you join or as an early part of your training, since sea survival training assumes at least foundational water confidence.

Does Eligibility Differ for Women?

No — every age, height, eyesight, medical, and physical fitness standard on this page applies identically regardless of gender. There is no separate or adjusted standard for women anywhere in DG Shipping’s eligibility framework. For a fuller picture of what the industry looks like for women specifically — institute selection, safety, and career growth — see our Merchant Navy for Girls guide.

What If You Don’t Meet a Specific Standard?

A few practical notes worth knowing:

• Minor vision issues are often manageable with corrective lenses for many (though not all) roles — get a proper assessment rather than assuming disqualification.
• Weight and general fitness are often the most fixable factors on this list — if BMI or general fitness is the concern, this is genuinely something you can address with time before your medical exam, unlike a structural condition.
• A disqualification for one specific rank or track doesn’t always rule out every Merchant Navy role — deck and engine roles have somewhat different vision standards, for instance, so a deck-disqualifying eyesight issue might not affect eligibility for an engine-room track. Discuss your specific results with the examining doctor rather than assuming the worst-case reading applies everywhere.