Recreational diving services. Requirements for gas blender training programmes Ingestion-build-47786 a) The constant head method

a) The constant head method

The general requirements include functional facilities that MDs need to meet users’ applications and information that needs to be included in associated documents

PD IEC TS 61994‑4‑4 specifies the terms and definitions of all the crystals along with the LN and LT crystals

4 Training and certification

Recreational diving services. Requirements for gas blender training programmes Ingestion-build-47786 a) The constant head method1 Scope This International Standard specifies requirements for gas blender training programmes and the competencies required of an individual in order to obtain a gas blender certificate from a training organization, attesting that he she has met or exceeded the requirements specified in this International Standard. This International Standard specifies two levels of gas blender qualification, as follows: Level 1 gas blender; Level 2 gas blender. This