REPUBLIKA.CO.ID, BALIKPAPAN -- The Indonesian navy (TNI AL) has sent four ships to patrol the northern waters of East Kalimantan.

KRI Kakap 811, KRI Pulau Rengat 711, KRI Birang 831, and KRI Suluh Pari 809 are ready to patrol and secure the Indonesian Archipelago Sea Lanes (ALKI) II, which includes the Makassar Strait, waters of Sulu, and those of Sulawesi that border Malaysia and the Philippines in the north.

"Right now, our primary focus is on protecting our fishermen and preventing foreign ones from poaching fish in our waters," the chief of the naval base in Balikpapan, East Kalimantan, Colonel Ariantyo Confrowibowo, said on Saturday.

Foreign fishermen from various countries located north of Indonesia enter ALKI II or exploit the Indonesia Exclusive Economic Zone (ZEE). The colonel explained that foreign fishing vessels stayed outside Indonesian territorial waters during daylight hours or when they were being monitored.