(a) whether the petroleum tankers have become useless after entrusting the transportation work of petroleum products on contract basis;
(b) if so, the number of such tankers which have become useless for want of any work;
(c) whether the Government are incurring losses worth crores of rupees every month in the form of tax due to these idle tankers; and
(d) if so, the measures being taken to put the same in use for gainful purposes?