ETSI EN 301 178规定了不提供海上遇险和安全通信功能（即不构成全球海上遇险和安全系统（GMDSS）的便携式甚高频（VHF）无线电话所需的最低技术特性和测量方法，该无线电话使用25 kHz或25 kHz的频率分配给海上移动服务或25 kHz和12.5 kHz通道。本文件还规定了技术特性、测量方法和所需的测试结果。 本文件包含证明以下内容的要求:“无线电设备的构造应确保其有效使用并支持有效使用无线电频谱，以避免有害干扰”[i.2]，并且“无线电设备支持确保获得紧急服务的某些功能”[i.2]。

ETSI EN 301 178 states the minimum technical characteristics and methods of measurement required for portable Very High Frequency (VHF) radiotelephones not providing maritime distress and safety communications functions (i.e. not forming part of the Global Maritime Distress and Safety System (GMDSS)) operating in certain frequency bands allocated to the maritime mobile service using either 25 kHz or 25 kHz and 12,5 kHz channels.The present document also specifies technical characteristics, methods of measurement and required test results.The present document contains requirements to demonstrate that ". Radio equipment shall be so constructed that it both effectively uses and supports the efficient use of radio spectrum in order to avoid harmful interference" [i.2] and that ".radio equipment supports certain features ensuring access to emergency services" [i.2].