Sirji ,This is a GPS system of India.
Indian Regional Navigation Satellite System - Wikipedia, the free encyclopedia
IRNSS is meant for navigation and it will in no way help you in monitoring ships at sea
In layman terms if u are on a ship and you have the required instrument then IRNSS will let you know of your position, the direction at which u are travelling and your speed.
For monitoring ships at sea we have NC3I(National command control communications inteligence network )which is at Gurgaon