sentences:  3007) by the Hydrographic and Oceanographic Service of the Chilean Navy (SHOA)
  
  Navigational aids in Chile are provided by the "Servicio de Señalización Marítima" [Maritime Signalling Service], a department of the "Dirección de Seguridad y Operaciones Marítimas" (Dirsomar) [Directorate of Maritime Security and Operations], of the "Dirección General del Territorio Marítimo y de Marina Mercante" (Directemar) [Directorate General of the Maritime Territory and the Merchant Marine] of the Chilean Navy.SHOM, the French Naval Hydrographic and Oceanographic Service, publishes "Livres des feux et signaux de brume" (Books of Lights and Fog Signals) in four volumes, updated periodically