42 | Communication equipment |
421 | Radio plant, gmdss |
422 | Lifeboat radio transmitters, epirbs |
423 | Data transmission plants, communication |
424 | Vhf/uhf telephones |
425 | Calling/command/crew call telephone plants, walkie-talkies |
503 | Lifesaving, safety and emergency equipment |
546 | Hobby, sports and entertainment equipment |