This is a simple cache that requires a TOTT. You'll need to send a cable to find the cache.
A little history about sending a "cable": Diplomatic messages are called cables, as if they were filaments of some multi-strand wire. Well, the first diplomatic cables were linked to real wire. They were transmitted by telegraph on underwater cables that in the 19th century began to connect nations. Before the transatlantic cable was laid, communications were limited to the speed of a horse or ship.