Senator Johnston asked Minister representing the Minister for Defence, upon notice, on 5 March 2012: For the period 1 July to 31 December 2011: (a) which submarines in the Royal Australian Navy (RAN) fleet were non operational; and (b) for each submarine that was non operational, what was the reason for its non operational status. (2) For the period 1 July to 31 December 2011, which submarines in the RAN fleet were: (a) fully operational and ready to respond to 'war like' situations; and (b) for what periods. (3) What was the cost of maintaining the six submarines for the periods: (a) 1 July to 31 December 2011; and (b) 1 January to 31 December 2011. (4) What was the total cost of operating the six submarines for the periods: (a) 1 July to 31 December 2011; and (b) 1 January to 31 December 2011. (5) What was the total cost of upgrading the six submarines for the periods: (a) 1 July to 31 December 2011; and (b) 1 January to 31 December 2011. (6) What were the crewing complements for each of the six submarines for each month in the periods: (a) 1 July to 31 December 2011; and (b) 1 January to 31 December 2011.