Oil & Gas Seven Viking enters service with Subsea 7 while Atlantic orders another ERRVEidesvik Offshore's new-build maintenance and light construction vessel Seven Viking is set to start an eight-year contract with Subsea 7. February 4th 2013, 1:08 am 1 min read Facebook An icon of a facebook f logo. LinkedIn An icon of the LinkedIn logo. Twitter An icon of the Twitter logo. The HY 820 class North Sea standby vessel