Final answer:
The statement is true. All stations not part of distress traffic should refrain from transmitting on the distress frequency until the distress signal is canceled.
Step-by-step explanation:
The statement is true. When distress traffic is being transmitted on a specific frequency, all other stations that are not part of the distress traffic must refrain from transmitting on that frequency until the distress signal is canceled. This rule ensures that the distress signal is not interrupted or interfered with by other transmissions.
For example, in the case of mobile phones operating at a frequency of 1.9 GHz, these devices may interfere with important communications or medical equipment that also operate on similar radio frequencies. In order to prevent any potential interference and ensure the smooth operation of critical systems, it is necessary to switch off or put mobile phones into a noncommunicative mode in certain environments, such as on airplanes and in hospitals.