Explanation: Survival craft portable two-way VHF radiotelephones are mandated for emergency communications. These radios are specifically designed to operate on international distress and safety channels. * **A) Operation on Ch-13.** This statement is NOT true. Channel 13 (156.650 MHz) is primarily designated for bridge-to-bridge navigational safety communications between vessels. While important for general maritime safety, it is not a required operating channel for survival craft equipment, which focuses on distress and on-scene communication. * **B) Effective radiated power should be a minimum of 0.25 Watts.** This is a true requirement. Regulations (like FCC Part 80) specify a minimum effective radiated power to ensure reliable short-range communication in an emergency. * **C) Simplex voice communications only.** This is true. Survival craft radios are designed for simple, push-to-talk, one-way-at-a-time voice communication, ideal for emergency situations. * **D) Operation on Ch-16.** This is true and critical. Channel 16 (156.800 MHz) is the international distress, safety, and calling frequency, mandatory for all maritime VHF radios, especially those used in survival craft, to alert rescue authorities. Thus, requiring operation on Ch-13 is the incorrect statement.