Protecting our coastline

What should be done to protect the West and East Coasts of India?

Intelligence has it that 800 Gujarati trawlers were issued illegally to
some Bangladeshis over the last few months and it is suspected that
the entire West Coast of India has been recced by these terror agencies,
so that these miscreants can come in from anywhere at any time...

Having grown up in Goa, the last thing I ever want to experience in my
lifetime, is some family enjoying at the beach being blown up to bits.