The security ministry will be watching the Pacific coast with radar, according to an announcement issued Monday.
The security minister, Mario Zamora, and President Laura Chinchilla are scheduled to announce plans Thursday.
The purpose of the radar is to track marine traffic, for both legal and illegal. The illegal includes drugs mugglers and illegal fishing, said the security ministry.
The system also will help with search and rescue in the gulf of Nicoya, it said.
The announcement will be made at the station of the Servicio Nacional de Guardacostas in Caldera.
Costa Rica has lacked a coordinated radar system.
Drug smugglers have been using helicopters to ferry their goods without the knowledge of officials.