Fire & Ice by John Joyce

At the height of the Cuban Missile Crisis a damaged Soviet nuclear submarine receives orders to attack the flagship of the American blockade with an atomic-tipped torpedo. Are the orders genuine, or are the scientists behind the ultra-secret telepathic experiment that transmitted the instructions intent on destroying the world? In America and the USSR the hunt is on for the two surviving telepaths capable of stopping World War III - the two young women code named Fire and Ice.