A comprehensive guide to DG Shipping medical standards – covering eyesight, height, BMI, colour vision, hearing, medical tests, common conditions, and everything you need to know before your medical examination.
Medical fitness is one of the most important eligibility requirements for a career in the Merchant Navy. Regardless of your academic performance, IMU-CET rank, or sponsorship status, you cannot join a sea‑going Merchant Navy course or sail onboard a ship unless you are declared medically fit according to the standards prescribed by the Directorate General of Shipping (DG Shipping), Government of India.
The DG Shipping Medical Examination is a comprehensive health assessment conducted to determine whether a candidate is medically fit to perform duties onboard merchant ships safely and effectively. Unlike a routine health check‑up, this examination evaluates whether a candidate meets the physical, visual, auditory, and psychological standards required for life at sea.
The examination is mandatory for admission into sea‑going pre‑sea training programmes, including:
Seafarers may be required to work in physically demanding environments, respond to emergencies, operate safety‑critical equipment, climb ladders, perform duties in confined spaces, and spend extended periods at sea without immediate access to specialist medical care. International maritime regulations therefore require every seafarer to meet defined medical fitness standards before joining a vessel.
Only a DG Shipping‑approved Medical Examiner is authorized to issue a valid medical fitness certificate for Indian sea‑going courses and employment. Medical certificates issued by family physicians, private hospitals, general practitioners, local clinics, or government hospitals (unless the examining doctor is DG Shipping‑approved) are not accepted.
Candidates are strongly advised to undergo a preliminary DG Shipping medical assessment well before applying for maritime programmes, particularly if they have concerns regarding eyesight, colour vision, BMI, hearing, or any chronic medical condition.
This guide provides a comprehensive understanding of medical fitness requirements for Merchant Navy aspirants, including: Complete Eyesight Guide, Height, Weight & BMI Standards, Colour Vision Requirements, Hearing Standards, Complete Medical Tests, LASIK & Refractive Surgery Guidelines, Common Medical Conditions, Female Candidate Medical Standards, Medical Examination Process, Company Medicals, Medical FAQs, Medical Preparation Checklist, and Medical Rejection & Appeal Process.
Eyesight is one of the most important medical requirements for a Merchant Navy career. Navigation officers rely on excellent eyesight to identify navigation lights, buoys, signals, and hazards, while engineering officers and ratings require sufficient vision for machinery operation, maintenance, and emergency response.
The Deck Department has the strictest visual standards. Fresh entrants cannot rely on spectacles or contact lenses to achieve the prescribed minimum unaided visual standard. The required baseline must already be present before admission.
Engineering officers must satisfy the prescribed minimum unaided distance vision, and vision must be correctable to the prescribed corrected standard using spectacles or contact lenses, where permitted under DG Shipping regulations.
ETO candidates generally follow visual standards applicable to engineering personnel.
Ratings are also required to satisfy DG Shipping visual standards applicable to their operational duties.
Colour perception is one of the most important components of the Merchant Navy medical examination. Correct identification of colours is essential for navigation lights, buoys, signal lights, electrical wiring, machinery indicators, safety alarms, and emergency equipment.
Deck Department: Requires the highest colour perception standards. Colour vision is assessed using the Ishihara Colour Vision Test and additional tests where required.
Marine Engineering & ETO: Must also satisfy applicable DG Shipping colour perception standards.
Deck Department: Fresh entrants cannot rely on spectacles to achieve the prescribed minimum unaided visual standard.
Marine Engineering & ETO: Spectacles may be permitted where allowed under DG Shipping regulations, provided the prescribed unaided standard is satisfied and vision is correctable to the required corrected visual acuity.
LASIK, PRK & SMILE Surgery: May be acceptable under DG Shipping regulations, subject to prescribed conditions including minimum age, mandatory post‑operative healing period, stable vision, healthy cornea, and no significant post‑operative complications.
Eyesight requirements differ between Deck, Engineering, ETO, and Rating streams. Deck Cadets are subject to the strictest visual standards. Colour perception is mandatory for all sea‑going personnel. Refractive surgery may be acceptable if all DG Shipping conditions are satisfied. Only a DG Shipping‑approved Medical Examiner can certify a candidate medically fit for sea service.
Physical fitness is one of the fundamental requirements for a career at sea. DG Shipping medical standards assess not only a candidate's height and weight but also their overall physical fitness, body composition, mobility, and functional ability.
| Category | Minimum Height |
|---|---|
| Male Candidates | 157 cm (relaxation of 5 cm for specified hilly/Island regions) |
| Female Candidates | 145 cm (relaxation of 5 cm for specified hilly/Island regions) |
BMI = Weight (kg) ÷ Height² (m²)
Healthy BMI Range: 18.5 – 25.0 kg/m²
Higher BMI may require additional evaluation, lifestyle counselling, weight reduction, or additional investigations such as ECG, blood sugar tests, or other cardiovascular assessments. Very high BMI values may affect medical fitness because obesity increases the risk of cardiovascular disease, diabetes, hypertension, reduced mobility, and heat intolerance.
Low BMI may also require further evaluation to investigate nutritional status, underlying medical conditions, thyroid disorders, and general physical fitness.
The examination may include assessment of posture, balance, muscle strength, joint mobility, coordination, flexibility, and functional movement.
The doctor evaluates conditions that may affect safe performance onboard, including flat feet, knock knees, bow legs, spinal deformities, limb abnormalities, previous fractures, joint disorders, and restricted movement. The assessment focuses on function rather than diagnosis alone.
Minimum height standards apply to both male and female candidates. There is no maximum height limit. No fixed weight limit exists. BMI is an important part of the DG Shipping medical examination. Both high and low BMI may require additional evaluation. Physical fitness is assessed holistically. The final medical fitness decision is made only by a DG Shipping‑approved Medical Examiner.
The DG Shipping medical examination is far more comprehensive than a routine health check‑up. Its objective is to ensure that a candidate is physically and mentally fit to safely perform duties at sea, often in remote environments where immediate specialist medical care may not be available.
The complete examination generally takes 2–4 hours. If further investigations are required, the process may extend over multiple days.
Sleep well the previous night. Stay hydrated. Avoid alcohol and recreational drugs. Eat a light meal unless instructed to fast. Carry all required documents. Wear comfortable clothing. Be honest while completing the medical history form.
Many Merchant Navy aspirants believe that having a previous illness automatically disqualifies them from pursuing a sea‑going career. In reality, DG Shipping‑approved Medical Examiners assess every medical condition individually. The deciding factor is not merely the diagnosis but whether the condition could compromise the candidate's ability to safely perform duties onboard a merchant vessel.
The cardiovascular system is one of the most carefully evaluated components of the medical examination. Conditions assessed include congenital heart disease, heart murmurs, coronary artery disease, previous heart attack, arrhythmias, valve disorders, cardiomyopathy, and previous cardiac surgery. Well‑controlled, low‑risk conditions may be acceptable, whereas significant cardiovascular disease affecting safe sea service may result in temporary or permanent unfitness.
Blood pressure is routinely measured. Candidates with elevated readings may require repeat measurements, lifestyle modification, physician consultation, and additional cardiovascular investigations.
Diabetes is evaluated carefully because uncontrolled blood sugar can impair judgment, physical performance, wound healing, and increase the risk of medical emergencies at sea. Candidates with well‑controlled diabetes may be assessed differently from those with poorly controlled disease or significant complications.
Asthma does not automatically disqualify a candidate. The medical examiner evaluates frequency of attacks, severity, medication requirements, hospital admissions, exercise tolerance, and lung function. Candidates with mild, well‑controlled asthma may be considered differently from those with severe or recurrent attacks.
Epilepsy is one of the most carefully evaluated neurological conditions because sudden loss of consciousness onboard a ship can endanger both the individual and the crew. For fresh entrants into sea‑going Merchant Navy programmes, a history of epilepsy or unexplained recurrent convulsive seizures is generally considered incompatible with the medical standards required for safe sea service.
Normal colour perception is mandatory for all sea‑going officer programmes. The Deck Department has the strictest colour perception requirements. Candidates who fail to meet the prescribed colour perception standards are generally not considered medically fit for sea‑going Deck programmes. Engineering and ETO candidates must also satisfy DG Shipping colour perception standards applicable to their duties.
Flat feet and knock knees are evaluated based on functional ability, not appearance. A flexible, painless flat foot with normal function may not affect medical fitness. Significant deformities that impair mobility, balance, endurance, or emergency response may result in temporary or permanent unfitness.
The spine is examined because many shipboard duties involve lifting, climbing, bending, and prolonged standing. Conditions assessed include scoliosis, kyphosis, lordosis, previous spinal surgery, chronic back pain, disc disorders, and spinal injuries.
Candidates must be able to hear emergency alarms, verbal commands, radio communication, machinery warnings, and bridge communication. The examination includes clinical hearing assessment, whisper or conversational voice testing, and audiometry (if indicated).
Stable, fully treated conditions may be assessed differently from active or progressive disease. Additional investigations or specialist opinions may be required.
Active hernias or hydroceles generally require treatment before certification. Following surgical correction, candidates are reassessed after adequate post‑operative healing. Varicose veins are assessed based on severity, pain, swelling, skin changes, and functional limitation.
Psychological fitness is an important part of the medical examination because seafarers often spend months away from home in isolated environments with demanding work schedules. The doctor evaluates emotional stability, behaviour, orientation, cognitive function, ability to cope with stress, previous psychiatric illness, current treatment, and substance abuse history.
Previous surgery does not automatically disqualify a candidate – the examiner assesses complete healing, functional recovery, and residual disability. Most mild allergies do not affect medical fitness, while severe, life‑threatening allergies require careful assessment.
Important: Candidates should always truthfully disclose previous illnesses, surgeries, hospital admissions, current medications, chronic diseases, psychiatric treatment, and allergies. Concealing medical information may result in cancellation of the medical certificate, loss of sponsorship, termination of employment, and serious safety risks onboard.
Do not wait until after clearing IMU‑CET or obtaining sponsorship to undergo your first DG Shipping medical. If you have concerns regarding eyesight, colour vision, BMI, flat feet, knock knees, asthma, previous surgery, heart disease, or any chronic illness, consider undergoing an early medical evaluation with a DG Shipping‑approved Medical Examiner. Identifying correctable issues early can save valuable time and prevent disappointment later in the admission or recruitment process.
DG Shipping evaluates candidates holistically, not based on a single diagnosis. Previous surgery or chronic illness does not automatically mean rejection. Honest disclosure of medical history is essential. Only a DG Shipping‑approved Medical Examiner can issue a valid medical fitness certificate and determine whether a candidate is Medically Fit, Temporarily Unfit (TU), or Permanently Unfit (PU).
