Quark Expeditions, the leader in Polar Adventure Travel, celebrates a major milestone with the launch of Ultramarine during a traditional ceremony at the Brodosplit shipyard in Croatia. SEATTLE, May 20, 2020 /PRNewswire/ — Quark Expeditions marked a major milestone today in the construction of its technologically-advanced polar vessel, Ultramarine, with a traditional launch ceremony that also honored the Brodosplit ship-building team.