 The Police Coast Guard conducts 24-hour round-the-clock patrols in Singapore's territorial waters from its four regional bases, in an area of more than 200 square nautical miles (700 km²).It is also responsible for maintaining law and order on most of Singapore's islands, except those which are directly accessible by road from the main island, such as Jurong Island, Sentosa and Pulau Ubin, although it provides them protection and security via seaborne patrols offshore.While piracy was the main source of concern leading to the establishment of the Marine Police way back in the early part of the 20th century, it has become almost a minor issue today with practically few to no cases of piracy in Singapore's territorial waters in the last decade.