Although your posts are bordering on trolling - I'll still respond to point out some inaccuracies in your understanding regarding shipbuilding. I will assume that you probably don't know a lot about our local shipbuilding capabilities and are taking cues from a few posts here at PDF.
You needed Danish designers to design a 300 tonne OPV.
True - because in that case the buyer wanted it as such (I believe that OPV was built for Kenya and the Kenyans had a Denmark design house design the OPV for them). Buyers can provide a design at will and our shipyards will build to their specs.
There are plenty of marine design houses locally and they have been providing designs for building marine craft for ocean, riverine and coastal uses since the sixties. Most of them also test designs on actual wave rigs and use CAD packages and conduct finite element analysis for tweaking stresses on ship designs.
People in India keep forgetting the size of our rivers, which are as formidable as the Amazon and its delta. I do not believe any river in India can compare. Marine craft are needed locally in Bangladesh in great quantity (hundreds every year) and are built to high specs like DNV, Lloyds register or RINA (Italian standards) or without them if the owner requires. It's a question of cost. One cannot judge the maturity of an industry by the lowest common denominator...meaning the image of the low cost 1500 ton tanker that is your favorite...
Now get a grip of real shipbuilding. These are made by our very own Cochin Shipyard limited- it is basically 10X the size of your largest shipyard.
India is a country ten times our size/economy and therefore has many times more of educated shipbuilding talent. We have been a sovereign country for some forty five years and had to basically build things from scratch (most yards were completely destroyed in 1971) while India has been free to develop their shipbuilding capability since 1948...
That being said, however, we have to note that according to a report prepared under the Sagarmala Programme of the Ministry of Shipping, India as of 2016 accounts for only about 0.45 per cent of the global shipbuilding market.
Since you quoted Cochin Shipyard, an article noted that,
"India’s leading shipbuilding company
Cochin Shipyard started operations in 1972, the same year that Korea’s
Hyundai Heavy Industries launched its shipbuilding venture. Forty years later, the Korean company claims a market share of 15 per cent in the global shipbuilding industry, having delivered more than 1,686 ships to 268 ship-owners in 48 countries ever since its inception. Cochin Shipyard’s total deliveries, on the other hand, are expected to be 107 by the end of 2012."
Given the size of Indian yards and their capability, one would have expected a bit better. One can chest-beat a lot about Indian shipbuilding, but when compared with China, Japan and Korea, where is India. Comparing with the likes of Bangladesh is shameful, really...
The only thing you've been able to build are some patrol boats & LCUs. Given the level of your industrial development you can't do better.
Bangladesh' industrial development is at par with its GDP I'd think. What we've been (or not been, more accurately) able to build is an indicator of defense and govt. purchase policies (influenced by graft) which favor vessels built in overseas yards. India does not suffer from such issues because policies are in place to prevent it. I don't think we are using even 10% of the capability of our yards.
Bangladesh cannot and will not compete with India or China (even Vietnam) on building vessels over ten thousand tons. The strength of local yards are in building vessels with displacements under ten thousand DWT. That is where they are profitable. The number of these capable smaller yards exceed a hundred though. So we will concentrate on building coasters. Nothing wrong with it if it employs our personnel.
You've Z-9s in service with your Navy, right ?
That's a negative. AW-109's are in use for SAR duties in the Bangladesh Navy (BNS Bangabandhu). If we induct ASWs it will probably be AW-159 Super Lynx types.
I think you are confusing BN with PN, PN uses HARBIN Z-9 ASW Helos in their F-22P Zulfiquar-class frigate.