Definition(s)
Alternative Activation System
An alternative activation system, as mentioned, means an emergency control system that is acoustically operated, remotely operated vehicle (ROV) operated or remote-controlled in some other way (Auto shear and dead man system on DP rigs).
Source: Guidance Notes on Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, Oil Industry Safety Directorate (India), 2012. Regulatory Guidance