MARCOS is a special force that is maintained by Indian Navy to handle emergency situations arising from various means.

To become a part of this organization a person must first become a part of India Navy. As per the criteria the person can join Indian Navy through NDA, CDS, SSC,etc. and also through direct recruitment for lower posts.

The required basic physical strength and mental strength is high.

The selection process consists of two parts. First one is three days long where a soldier's physical stamina is accessed.

The next phase of screening is tougher and then makes the final selection of soldiers for further training. The screening or selection phase rejects more than half applicants on the basis of their physical stamina required for the force. This phase involves a high degree of physical exercises and sleep deprivation. It is only after this process that actual training begins.

All the best.