SunStone Ships expects to sign contracts in China soon for two more expedition cruiseships.

The Miami-based owner marked the launching of the first in its series of Infinity-class vessels, the Greg Mortimer, by announcing that a couple more option newbuildings should be firmed up in the next two months.

The remaining three options are expected to be signed within 2019, which would mean building all 10 vessels in the original framework agreement with China Merchants Heavy Industry.