When testing is conducted on 2182 kHz or Ch-16, testing should not continue for more than how long in any 5-minute period?

Testing on 2182 kHz or Channel 16 is regulated to ensure that emergency communication remains clear and uninterrupted. The standard time limit for conducting tests on this frequency is 10 seconds in any 5-minute period. This limitation is crucial because Channel 16 is primarily designated for distress calls and safety communication in maritime environments.

Permitting only brief testing intervals helps minimize potential interference with urgent communications from vessels in distress or those needing immediate assistance. A longer duration could crowd the channel and hinder critical communications. By restricting testing to short intervals, the FCC ensures that the frequency remains available for emergency use, thereby prioritizing safety at sea.