燃料の豊かなブルネイ泊地近海に敵潜水艦の跳梁が見られる。これを捜索制圧し、重要拠点である同泊地周辺の安全を図れ! Enemy submarines have been sighted near Brunei Anchorage where fuel reserves are aplenty. Search for and suppress them in order to secure the area surrounding the anchorage, an important stronghold!