First ever submarine added to the Navy

The nature of submarines also fosters the use of deception to effect sea control. During the Falklands War the Argentinean submarine SANTIAGO DEL ESTERO was inoperable during the conflict due to an inability to submerge, but Argentina – convinced that the United Kingdom was in receipt of satellite intelligence – went so far as to reposition her to a covered location in the hope that the British would conclude she was on patrol.