Greece Italy Netherlands Poland Turkey The Centre of Excellence for Operations in Confined and Shallow Waters (COE CSW) is an international military organization founded to support NATO's transformation program.

Confined and shallow waters are a cramped, congested and contested operational environment characterised by complexity, speed, disguise and a diversity of actors.

[3] Furthermore, the centre works on a range of projects related to confined and shallow water-operations that are initiated by specific 'Requests for Support'.

It provides the infrastructure, basic services, financial contributions and core staff personnel as well as a number of "Subject Matter Experts".

Upon the foundation of the centre, Greece, the Netherlands, and Turkey acceded as sponsoring nations providing "Subject Matter Experts" and financial contributions.