Almost every visitor’s first impression of the Signal series is of constellations of stars, probably because of the intuitive intrigue of celestial patterns, probably because of the call of ad astra per aspera that runs through histories—whether via popular culture references like Star Trek or the many institutions that uphold the spirit of striving toward the stars through hardship. In Tan Mu’s Signal paintings, the constellation points away from subject or telos toward a telecommunication system, a critical infrastructure with greater significance than is often assumed: the submarine cables. As of 2025 the network comprises 597 cable systems and 1712 landings in the latest cable map produced by TeleGeography. It is by no means an even system. One easily traces clusters and geometries that mirror geographical surfaces and socioeconomic activities. The cables and landings in Signal 04 (Norway, 2025), for example, exude a commanding glow with a dash of airiness in the upper right, conveying the orderliness and austerity of magnificent coastlines. Signal 06 (Caribbean Sea, 2025), in comparison, is flamboyant and unapologetically convoluted, reflecting the dense archipelago. More than mapping the negative space of inhabited land, the paintings portray the evolving co-authorship of geography, economy, politics, and technology. In oil and acrylic, the thick yellow dots and pale lines create a luminous image that some read as collage or even electrically lit installation.