Maritime navigation and radiocommunication equipment and systems. Digital interfaces - Multiple talkers and multiple listeners. Ship systems interconnection. Companion standard requirements and basic companion standards Ingestion-build-209208 sewerage and treated waste water

sewerage and treated waste water under pressure

as defined in ISO 5053-1:2015

a) the replacement of ignition sources 0 and 1 with ignition sources smouldering cigarette and match flame equivalent from BS EN 597-1 and BS EN 597-2

BS EN IEC 60122‑4 is applicable to crystal units with thermistors mainly used in the field of mobile communication that requires high frequency stability such as local reference signal generator for the mobile phone base station or GPS

The requirements are defined with appropriate cross-reference to BS EN 13242

Maritime navigation and radiocommunication equipment and systems. Digital interfaces - Multiple talkers and multiple listeners. Ship systems interconnection. Companion standard requirements and basic companion standards Ingestion-build-209208 sewerage and treated waste water