Reported here. Not the sort of thing you want to be involved with, but it could have been worse.
The merchant vessel, MV Kity, was on passage to Colombo when it sustained "a glancing blow" from a guided-missile frigate of the Navy, the 2,800-tonne INS Dunagiri, around 30 nautical miles off Mumbai port on Monday night.
"The warship was manoeuvering to avoid some fishing vessels when the mishap took place. Fortunately, no significant damage or injury was suffered by either ship. A collision could have led to loss of human lives, apart from a huge ecological disaster in terms of an oil spill," said a source.
More on the "Leander-class" ships (to which the INS Dunagiri belongs) here.