A few points. Yes some might say this isn't a "big deal" because the INS came off without a scratch but the incident raises some issues and points to some problems
Firstly, post USS Cole, no navy- especially not the IN, can avoid the threat small trawlers/boats pose to mighty naval assets. YES, this ship was in Indian waters and close to shore and thus the threat level would be lowered but even still, the IN simply shouldn't let its guard down at any point when a ship is at sea. It's a sad state of affairs but that's the reality and the world we live in where the next attack could be anywhere and anytime. 26/11 should've proven this.
Secondly, one could argue that collision prevention and radar systems would be pretty useless in the waters of Mumbai that truly are amongst the most saturated and congested in the world, and especially against targets as small as fishing trawlers. And in fact this isn't a worrying vis a vis how the IN would perform in wartime as then the level of preparedness would be sky high and the targets would be 100s if not 1000s of tonnes in displacement and scores of meters long. You can't use this isolated incident with a FISHING TRAWLER to predict how the IN would perform in war- that's retarded. HOWEVER, it does raise questions about the sailors and systems on watch that night more specifically the force protection unit (whose job it is to protect the vessel from all threats and thus conceivably small targets like this)- did they have NVDs? Were they alert enough? Same questions for the officers and sailors on watch. And lastly about the EO/IR sensors on board- were they being used to scan for such threats to the ship?
Lastly I would say to all those apparently in hysterics about how these sort of things are on the rise with the IN. I would say, yes, this may be true but that doesn't mean much. It doesn't mean the IN is failing or in decline, by all accounts they are amongst the finest and most professional navies on the planet. Rather a combination of factors- the expansion of the IN's fleet and the increased number of vessels and thus congestion in Indian waters in Indian waters- of all sizes.
Yet another incident that makes the need for INS Karwar ever more apparent and one hopes all deadlines are met for this mega-project and it is finished soon.
Nonetheless a board of inquiry has been initiated so we should all hold off until them to make judgments. If there were failings they will be be identified and addressed for sure. And maybe the IN would do well in looking at its SOPs for ships in such situations.