Explanation: LRIT (Long Range Identification and Tracking) is a mandatory international system under the SOLAS (Safety of Life at Sea) convention. Its primary purpose is maritime security, allowing each flag state to monitor the positions of its own ships engaged in international voyages. The data is transmitted securely via satellite to an authorized Data Centre, often managed by or for the flag state, ensuring sovereign control over this critical security information. Option A is incorrect because AMVER (Automated Mutual-Assistance Vessel Rescue System) is a voluntary search and rescue system, entirely separate from the mandatory LRIT security tracking. Option C is incomplete; while port states and Captains of the Port can access relevant LRIT data for vessels in their areas under specific circumstances, the system's fundamental structure is based on flag state responsibility and managed through dedicated Data Centres. Option D is incorrect; LRIT data is transmitted securely and is not broadcast on the public internet for general company tracking.