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Marine engineering is a field that deals with the engineering aspect of the maritime industry. Like any conventional engineering course, marine engineering is a four year course which prepares an individual to become an engineer on ships.
Marine engineering is all about machinery on ships, boats, yachts, or any sea going vessels. There are several other technical streams that sprout out from this field. The curriculum of the course focuses on teaching specialized knowledge of both theoretical and practical marine and mechanical engineering. Greater importance is given to impart skills and competencies that are required to operate and maintain machinery on board ships.
The subjects taught in the first and second year of the course are almost the same as those taught in conventional mechanical engineering. The main aim is to introduce engineering sciences to the students and to make them understand the applications of those sciences in various aspects of marine engineering.
Nautical Science
While marine engineering makes an individual a ships engineer, nautical science prepares a person to become a deck officer. Nautical science is a three years course after which the student joins a ship as trainee cadet officer. After completing sufficient time at the sea and clearing required competency exams, promotion is given to the officer.
Nautical science imparts nautical technology knowledge which is important to become a deck officer on board ships. Theoretical and practical knowledge required for navigation, cargo operation, and ship maintenance and operation is imparted during the three years course, along with exposure to some areas of humanities and social sciences. Hands-on training is extremely important as a deck officer and thus detailed procedure and maintenance techniques of importance deck machinery is an integral part of this course.

Dear,
PGCET : post graduation common entrance test
syllabus of karnataka PGCET exam:
there are two parts of the paper & four section :
-general intelligence & reasoning
-general knowledge
-quantitative analysis
-test of proficiency in english language
-dear if you have a valid score card of GATE entrance exam, then you do not need to give karnataka PGCET exam
tips for preparation:
you should have to practice all subjects independently ok
for removing tension you should do meditation for 15 min only it will really provide you positive power
play , listen songs
make a time table all activities
at, last do never take tension , duration of sitting time is not necessary but what have you gain is necessary
Good luck.