Walkie-talkies used for wireless communication between maritime personnel at sea, docks, ports or maritime rescue centers are called maritime walkie-talkies or marine walkie-talkies. Maritime walkie-talkies are highly professional and have a harsh operating environment, requiring strong waterproof, salt spray, floating and other functions.

The working frequency is a unified international maritime communication frequency, TX: 156.025MHz-157.425MHz RX: 156.025MHz-163.275MHz. The working channels are divided into international channels (International), US channels (USA) and Canadian channels (Canada). All professional maritime walkie-talkies have these three standard channels.