INTRODUCTION 1. The aim of this document is the standardization of an accessory power and communications rail interface that: (a) Is an interface that permits interchangeability. It is compatible with the STANAG 4694 NATO Accessory Rail and backwards compatible with US MIL-STD-1913 accessories. (b) Provides power transfer through rail interface (c) Permits device control through the rail interface. 2. The following terms and definitions are used for the purpose of this standard: Dismounted Soldier Systems: Everything the soldier wears@ carries and consumes to fulfill the soldiers?? tasks as individuals@ as members of fighting teams and as parts of higher-level operational units. 3. This standard deals with: A standard interface between electrical accessories for small arms and the weapon that provide power from a centralized power source. The NATO Powered Accessory Rail according to this STANAG is compatible with the NATO Accessory Rail@ STANAG 4694 and has full backwards compatibility with existing US MIL-STD-1913 accessories. This standard is implemented when signatory countries@ by means of appropriate national procedures@ have: (a) Ensured that all persons responsible for the design and construction of Dismounted Soldier System and related equipment are informed of the existence of the NATO standard characteristics defined in this Agreement; and (b) Ensured that the introduction of new equipment designs does not hinder the interoperability of their respective new equipment with other Nations?? Dismounted Soldier System. It is the implementing Nation??s responsibility to provide interoperability at the level of their choices in accordance with this standard.