Sweden's Saab said on Wednesday it plans to put its Swordfish maritime patrol system on two new aerial platforms as demand rises for ways to tackle maritime threats, including the proliferation of submarines. The move to put an enhanced version of its Intelligence, Surveillance and Reconnaissance (ISR) systems on new airframes in partnership with Canada's Bombardier emerged at the Singapore Airshow as tensions escalated in the South China Sea. Saab said the system, currently available on the out-of-production Saab 2000 turboprop airliner, would now be offered on Bombardier's Global 6000 business jet and the Q400 turboprop. "There are several countries that are coming closer and closer to a procurement process and we are carefully working together with several of those countries…