Explanation: Survival craft portable two-way VHF radios are essential GMDSS (Global Maritime Distress and Safety System) equipment. Statement B is NOT true because these radios are primarily for *voice* communication. While they operate simplex, the required channels are Ch-16 (distress, safety, and calling) and at least one other working channel (e.g., Ch-6 for inter-ship). Ch-70 is exclusively for Digital Selective Calling (DSC) and is not a voice channel, nor is it a required operating channel for these portable radios. Statements A, C, and D are all true requirements for survival craft portable VHF radiotelephone equipment: * **A) Watertight to a depth of 1 meter for 5 minutes:** This ensures the radio functions in harsh marine environments. * **C) Effective radiated power (ERP) should be a minimum of 0.25 Watts:** This provides sufficient range for localized communication with rescue craft or other survival craft. * **D) The antenna is fixed and non-removable:** This prevents the antenna from being lost or damaged in an emergency, ensuring operability.