The Second-in-Command -LRB- 2i/c or 2IC -RRB- is the deputy commander of any ORGANIZATION@1 or ORGANIZATION@2 unit , from battalion or regiment downwards .

The Second-in-Command -LRB- 2i/c or 2IC -RRB- is the second commander , the person that is in charge after the commander , of any ORGANIZATION@1 or British Royal Marines unit/group .
