Hydrographic and Oceanographic Service of the Navy (SHOA)

Hydrographic and Oceanographic Service of the Navy (SHOA)
Name	Hydrographic and Oceanographic Service of the Navy (SHOA)
Native name	Servicio Hidrográfico y Oceanográfico de la Armada
Formed	1873
Headquarters	Valparaíso, Chile
Jurisdiction	Republic of Chile
Chief1 name	(Director)
Parent agency	Chilean Navy

Hydrographic and Oceanographic Service of the Navy (SHOA) The Hydrographic and Oceanographic Service of the Navy (SHOA) is the Chilean naval agency responsible for hydrography, oceanography, tide forecasting, and maritime safety. SHOA produces nautical charts, bathymetric databases, and tsunami warnings, operating from Valparaíso and cooperating with international partners across the Pacific and Atlantic littorals. Its activities intersect with regional science, navigation, fisheries management, and disaster risk reduction initiatives.

History

SHOA traces institutional roots to 19th-century nautical mapping linked to Valparaíso port development and naval modernization under presidents such as Domingo Santa María and Federico Errázuriz Zañartu. Early hydrographic expeditions paralleled global surveys by organizations like the United Kingdom Hydrographic Office, the United States Coast and Geodetic Survey, and the Hydrographic Office of France. During the 20th century SHOA expanded alongside Chilean naval reforms influenced by events such as the War of the Pacific aftermath and maritime boundary negotiations with Peru and Bolivia. SHOA’s modern tsunami mandate grew after the 1960 Valdivia earthquake, with scientific linkages to research from Scripps Institution of Oceanography, National Oceanic and Atmospheric Administration, and the Intergovernmental Oceanographic Commission of UNESCO. Political transitions, including the administrations of Salvador Allende and Augusto Pinochet, affected naval budgets and institutional priorities; later democratic governments invested in tsunami early warning systems following the 2010 Chile earthquake and megathrust events studied by teams including Caltech seismologists and researchers from Universidad de Chile.

Organization and Structure

SHOA operates under the authority of the Chilean Navy with a hierarchical command reporting to the Minister of Defense (Chile). Its headquarters in Valparaíso houses technical divisions comparable to units within Naval Oceanographic Office (USA) and the Canadian Hydrographic Service. Internal directorates coordinate hydrographic surveys, oceanographic modeling, geodesy, and marine cartography, and maintain liaison with the Servicio Nacional de Geología y Minería and the Dirección General del Territorio Marítimo y de Marina Mercante (DIRECTEMAR). SHOA’s structure includes regional centers for the Los Lagos Region, Magallanes Region, and northern ports such as Iquique and Antofagasta, aligning operational assets with maritime zones defined by the United Nations Convention on the Law of the Sea and bilateral accords with Argentina and Peru.

Functions and Responsibilities

SHOA issues nautical charts, tide tables, and hydrographic publications akin to outputs of the Admiralty (United Kingdom) and the Istituto Idrografico della Marina (Italy). It manages national bathymetric databases used by port authorities like Puerto de Valparaíso and maritime pilots in San Antonio, Chile. SHOA provides tsunami advisories in coordination with the Centro Sismológico Nacional and emergency agencies including Onemi and municipal authorities of Concepción and Santiago Metropolitan Region. Scientific responsibilities extend to supporting fisheries research with institutes such as Instituto de Fomento Pesquero and environmental monitoring aligned with the Convention for the Conservation of Antarctic Marine Living Resources through Chilean Antarctic programs at Base Presidente Eduardo Frei Montalva.

Hydrographic Surveys and Charting

SHOA conducts multibeam echo sounder surveys, single-beam sounding, and geodetic positioning using GNSS systems like Global Positioning System networks referenced to national datums developed with the Instituto Geográfico Militar (Chile). Chart production follows standards of the International Hydrographic Organization and uses symbology consistent with publications from the International Maritime Organization. SHOA’s survey campaigns have been executed in collaboration with international research vessels from NOAA Ship Okeanos Explorer, RRS James Cook, and regional assets such as ARA Puerto Deseado and Chilean frigates. Hydrographic products support commercial shipping lanes to ports including Iquique, Caldera, Coquimbo, and Punta Arenas and aid scientific missions studying bathymetric features like the Chile Rise and the Peru–Chile Trench.

Oceanographic Research and Tsunami Warning System

SHOA operates oceanographic observing systems, runs numerical models for tides and tsunami propagation, and maintains coastal tide gauge networks interoperable with the Global Sea Level Observing System and Intergovernmental Oceanographic Commission networks. The agency collaborated with international tsunami initiatives such as the Intergovernmental Coordination Group for the Pacific Tsunami Warning and Mitigation System and scientific projects involving Earthquake Research Institute (University of Tokyo) and GFZ German Research Centre for Geosciences. SHOA’s role in tsunami warning integrates seismic data from the Centrum Sismológico Nacional and sea-level observations from tide gauges in La Serena, Valdivia, and Chiloé, and it participates in post-event assessments alongside teams from Massachusetts Institute of Technology and University of Tokyo.

Vessels, Equipment, and Technology

SHOA operates hydrographic vessels, survey launches, and autonomous platforms comparable to fleets of the Brazilian Navy Hydrographic Center and the Royal Australian Navy Hydrographic Service. Equipment includes multibeam echo sounders by manufacturers like Kongsberg Maritime, sub-bottom profilers, ADCPs used in studies with Woods Hole Oceanographic Institution, and unmanned surface vehicles trialed with partners such as Norwegian University of Science and Technology. SHOA employs oceanographic models including ROMS and tide models cross-validated with data from Copernicus and satellite altimetry missions such as Jason (satellite) and TOPEX/Poseidon.

International Cooperation and Training

SHOA maintains bilateral agreements and participates in capacity-building with entities like the International Hydrographic Organization, United States Navy, Japan Coast Guard, Instituto Hidrográfico (Portugal), and regional bodies such as the Pan American Institute of Geography and History. Training exchanges involve academies and universities including Universidad Técnica Federico Santa María, Pontifical Catholic University of Valparaíso, and the Naval War College (United States). SHOA hosts workshops on hydrographic surveying standards, contributes to multinational exercises with Naval Forces Southern Command (SOUTHCOM), and engages in Antarctic hydrography under frameworks of the Antarctic Treaty System.

Category:Hydrography Category:Oceanography Category:Chilean Navy