Explanation: Proper operation of a VHF marine transmitter at high power involves transmitting the intended power to the antenna with minimal energy reflected back. A standard VHF marine radio's high power setting is 25 watts. For efficient operation, nearly all the forward power should be radiated by the antenna, resulting in very low reflected power. Low reflected power indicates a good match between the transmitter and the antenna system, signifying low Standing Wave Ratio (SWR). * **A) 25 watts forward/1.5 watts reflected:** This indicates the correct high power output and very little reflected power. A reflected power of 1.5 watts out of 25 watts forward represents a very efficient antenna system, characteristic of proper operation. * **B) 25 watts forward/25 watts reflected:** Equal forward and reflected power indicates a severe mismatch (extremely high SWR), meaning almost all the power is bouncing back. This is very poor operation and could damage the transmitter. * **C) 27.5 watts forward/1.5 watts reflected:** While the reflected power is low, 27.5 watts forward exceeds the maximum legal power limit (typically 25 watts) for a VHF marine transmitter, making it improper. * **D) 2.5 watts forward/1.5 watts reflected:** This shows the low power setting of a VHF marine radio. While appropriate for close-range communication, it doesn't represent the full operational capability implied by the question's context alongside the 25-watt options.