Hello

Yes, aeronautical engineering is offered as a diploma course in many polytechnic colleges in Maharashtra.
Admissions usually happen through the DTE Maharashtra process, where seats are given based on 10th class marks, not an entrance exam. If your diploma is from a recognised institute, it is fully accepted.
Later, you can also use this diploma to enter B. Tech directly in the second year through lateral entry.
Overall, it’s a smooth path if you want to build a career in aviation or engineering.