GPT Guide – Introduction1.1_What Is the GPT System1.2_Why GPT Is Not a Survival Device1.3_Applicable Water Activities2.1_What Is Geofencing2.2_Judgment of Monitoring Responses and Search Initiation under Abnormal Conditions2.3_How the System Supports Understanding and Information Handover After a Situation Is Confirmed2.4_How the GPT App Continues Safety Monitoring in the Background3.1_Overview of GPT Device Operations (A|T Series)3.2_Maintenance Transportation and Warranty Information4.1_GPT App Practical Operation Guide (Standard SOP)4.2_Core Tutorial Page|Smart Monitoring Map & Real-Time Status Interpretation (SOP 3)4.3_Practicing with the Simulator5.1_Line-of-Sight (LoS) Communication Distance in Maritime Environments – Reference Materials|Gpacers Poseidon Tracking & Rescue System5.2_Empirical Testing and Validation of the GPT System’s Search and Communication Capabilities – Reference Materials|Gpacers Poseidon Tracking & Rescue System5.3_Some Devices You Think Protect You, But Are Actually Only for Emergency Calls