Months before a Chinese spy balloon drifted across Alaska and Canada, the Canadian military discovered and retrieved Chinese spy buoys in the Arctic, a region of long interest to Beijing. The Chinese buoys were monitoring U.S. submarines and the melting of ice sheets. Retired Canadian Armed Forces (CAF) Lieutenant-General Michael Day said the buoys would likely have been used to monitor U.S. nuclear submarine traffic in the Arctic, and for mapping seabeds and ice thickness. more
