Japanese Prime Minister Sanae Takaichi. Beijing and Tokyo traded complaints against each other as their simmering diplomatic spat intensified over the weekend after Chinese fighter aircraft allegedly ...

What is a high-frequency radar? High-frequency or HF radar is a shore-based remote sensing system used to measure offshore water surface currents by sending a low-power electromagnetic pulse over the ...

It is an old trope in submarine movies. A sonar operator strains to hear things in the ocean but dares not “ping” for fear of giving away the boat’s location. Radar has a similar ...