Even if India decides to use Chabahar port, Pakistan can block Indian ships going to Chabahar in an event of a war. I guess it all depends on Pakistan, Indians.
its not if india decides to, its our port we will use it. first of all we will make sure the ships stay in international waters not in pakistani waters. if pakistan blocks it it will be considered an act of war. and u know what happens when we go on war.
in case of war we will not let the ships out or they will be escorted by our navy to india.