Senator Bob Carr: The Minister for Defence has provided the following answer to the honourable senator's question: (1) and (2) (a) and (b) Navy applies the definition of 'operating cycle' in unclassified responses to questions on the operational status of naval vessels. The operational status of submarines in accordance with this definition for the period 1 January to 30 June 2012 has been reported in the response to Senate Question on Notice 2058. (3) (a) The total cost of maintaining the six submarines over the period 1 January to 30 June 2012 was $261.2million. (b) The total cost of operating the six submarines over the period 1 January to 30 June 2012 was $88.5million. (c) The total cost of upgrading the six submarines over the period 1 January to 30 June 2012 was $21.2million. (4) Submarines were crewed as follows over the period 1 January to 30 June 2012: HMAS Collins – full complement throughout. HMAS Farncomb – full complement throughout. HMAS Waller – not crewed throughout. HMAS Dechaineux – full complement throughout. HMAS Sheean – not crewed throughout. HMAS Rankin – not crewed throughout.