Marlin is also invited to NATO exercises with new maritime unmanned systems Exercise REPMUS 22 and DYNAMIC MESSENGER 22. REPMUS 22 is led by Portugal and supports the NATO Maritime Unmanned Systems Initiative (MUSI). The MUSI was launched in October 2018 to promote interoperability in developing Unmanned Maritime Systems. DYNAMIC MESSENGER 22 aims to integrate unmanned maritime systems into maritime operations. It will be the first-ever exercise focusing on unmanned underwater systems held under NATO command and on integrating unmanned systems into NATO naval task groups.