The 54-hour countdown for the launch, which is scheduled to take place at 4 p.m., began on Tuesday at the Satish Dhawan Space Centre.
IRNSS-1F is the sixth navigation satellite in the IRNSS space system, which comprises of seven satellites.
Till date, ISRO has launched five regional navigational satellites (IRNSS-1A, 1B, 1C, ID and 1E) as part of a constellation of seven satellites to provide accurate position information service to users across the country and the region
The first satellite IRNSS-1A was launched in July 2013, the second IRNSS-1B in April 2014, the third on October 2014, the fourth in March 2015, and the fifth in January this year.
The seventh satellite IRNSS-1G is expected to be launched in the second half of 2016.