Four years at a minimum. Most also get a masters degree, which takes 2 more years.
You do not have to go to college.
You don't have to go to college to become a poet.
A long career youll need to go to a university
its 4 years to go to college to become a detective.
To become a marine engineer you would need to obtain a bachelors degree in marine engineering, ocean engineering, or mechanical engineering. Typically that takes around 4 years. The following link provides more insight on what it takes to become a marine engineer, http://www.degreefinders.com/education-articles/careers/how-to-become-a-marine-engineer.html
about 10 years of college
To be an Astronautical Engineer you will have to got to school for many many years. You will have to have a science degree at the very least. THen you will have to go to an accredited college.
To become a design engineer you need to go to college or university and get a degree in Design Engineering. Most programs have a co-op so students can get work experience and make contacts.
Potatoe.
To be trained, an engineer needs to go to college and obtain a 4 year degree.
4 years!!!
5 years