The multi-acre facility of the Garden Reach Shipbuilders and Engineers Limited (GRSE) is located right on the banks of the Hooghly river in the West Bengal capital.
Intelligence reports have suggested a potential security threat to the facility, especially after a temporary employee of the company was arrested last year by the Kolkata police's STF for being part of a suspected ISI ring.
The GRSE has already created infrastructure like armoury, jawan barracks and control room for the CISF squad that will be headed by a senior Commandant-rank officer.
They said a meeting of central security agencies was recently convened after which the Home Ministry also decided to deploy 100 CISF personnel to guard the Indian Institute of Space Science and Technology (IIST) in the Valiamala area of Kerala's Thiruvananthapuram.
Sources said effectively securing the facility was important as it is adjacent to the Liquid Propulsion Systems Centre, a research and development wing under the ISRO.
The GRSE in Kolkata has till now built about 100 warships
for various roles rendered by the Indian Navy and the Coast Guard ranging from frigates, corvettes to fast patrol boats.
The 'Mini Ratna' company is one of the important firms involved in creating strategically important vessels for the Navy and is also at the forefront of the defence-related 'Make in India' campaign.
GRSE has both wet and dry docks for ship building and trial purposes which open on the river front.
The Special Task Force of the Kolkata Police had busted a suspected ISI module in the city last year and arrested few people including a temporary GRSE employee after pictures of the facility and vessels being constructed there were recovered from their possession.
