As you say that you want to join the Merchant Navy as a Junior Engineer. So I am searching for the Age limit for the Merchant Navy as a Junior Engineer post. This is as follows:

Minimum Eligibility to join Indian Navy

Age –
19 to 24/25 years

Qualification –

The applicant must have Bachelor's degree in Mechanical/ Electrical/ Technology Engineering from recognized university.

Medically Fit.

The applicant must be Indian

Eye-Sight :
6/6 without glasses,
No color Blindness.

Syllabus:
Physics
Mathematics
English

Selection process Of Indian Navy
Test
Personal Interview
Medical fitness Test
Test could include group discussion and various physical and psychology tests