CB (Citizens Band) radio operates in the 27 MHz band and is used for short-distance, person-to-person voice communication. Popular among truckers, CB radios allow users to share traffic updates, road conditions, or just chat. No license is required in most countries, but power and usage rules apply.
Marine radios operate primarily on VHF frequencies (156–174 MHz) and are used by boats for ship-to-ship and ship-to-shore communication. Unlike CB radios, marine radios are regulated by maritime authorities and are crucial for safety, weather updates, and emergency calls (e.g., on Channel 16).
A walkie-talkie is a handheld two-way radio that allows communication over short distances using push-to-talk (PTT) functionality. It’s commonly used in security, events, hiking, and construction. They usually operate on UHF or VHF bands and do not require cellular networks.
