The Hydrographic and Oceanographic Service of the Navy (SHOA)is the institution belonging to the Chilean Navy whose mission is to ensure safety in navigation around the coast and Chilean territory through cartography of the sea, rivers, and lakes.
Since the 19th century, it has been in charge of the creation of nautical charts in the country; however, it broadened its role in the 20th century. Nowadays, it draws the nautical charts of all the territory, conducts research, and publishes documents about tides, seaquakes, ocean currents, astronomy.
Also it controls the official hour of the country. The SHOA is the institution in charge of giving first alerts in case of a tsunami. It has modern facilities, state-of-the-art software and the most modern printing techniques in the country.
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