What the above poser said ^
Appreciation of the $A will increase foreign currency price of Australian exports making it less internationally competitive, however the Australia dollar value of imports will fall (as the $A can buy more foreign currency) increasing demand for imports..Thus worsening the BOP as they are greater outflows($ paid for imports) than inflows($ made from exports).
Conversely, a depreciation of the $A will decrease the foreign currency price of Australian exports making it more internationally competitive (because it's cheaper), however the $A value of imports will rise (as the $A can buy less foreign currency) decreasing demand for imports..Thus improving the BOP as there are greater inflows ($ made from exports) than outflows ($ paid for imports).
Thanks for making this thread & refreshing my memory after half-yearlies.