Navigation -- Foreign relations 3 History -- 3 Pirates -- 3 Safety measures 3 Strategic aspects 3 Terrorism -- 3 more ... National security -- 2 Piracy -- 2 Safety measures. -- 2 Coasts -- 1 Discoveries in geography -- 1 Foreign relations -- 1 Maps 1 Maritime Terrorism -- 1 Merchant marine -- 1 Naval history -- 1 Safety measure -- 1 Safety measures -- 1 Shipping -- 1 Southeast Asia 1 Southeast Asia -- 1 Trade routes -- 1 less ...