Question 4945 Deck General

The correct answer is C) radiotelephone. The code letter "K" is typically used as a visual or sound signal, not a radiotelephone signal. Radiotelephone communication is used for verbal exchange of information, while the code letter "K" is a visual or sound signal used to remind ships to listen continuously on their radio. Therefore, the radiotelephone is the one method that cannot be used to transmit the "K" signal in this context. The other options (A, B, and D) are all valid methods that an icebreaker can use to transmit the "K" signal to remind ships of their obligation to listen continuously on their radio.