This follows an unsuccessful attempt on Monday, in which an unmanned, Navy ROV was sent down the 370 ft deep rat-hole coal mine in Meghalaya, but got stuck.
Yesterday, the Indian Navy sent out five more unmanned remotely operated vehicles (ROV) to survey nearby abandoned mines to discover whether they are connected to the main shaft in which 15 miners got trapped in last month.
This follows an unsuccessful attempt on Monday, in which an unmanned, Navy ROV was sent down the 370 ft deep rat-hole coal mine in Meghalaya, but got stuck.
