In May 2019 Northern Offshore Services entered an agreement with Svensk Sjöentreprenad for their vessel Sound Enterprise. N-O-S will incorporate the vessel into its fleet and name it M/V Contender and have full management over the vessel.

M/V Contender is a crew transfer vessel designed and build by Damen shipyards and will be included in the C-series together with M/V Carrier which is a sister vessel.