Mermaid Sapphire is an offshore multipurpose vessel. Built in 2009, the ship is used for mostly research and undersea work. She is a purpose-built ABS Classed DP2 ROV and air diving support vessel, designed for operation of dual deepwater work-class ROV's (Quasar Compact or Triton XLX) plus optional inspection-class ROV. The ROV's are installed on a dedicated raised deck level, leaving all back deck space for project equipment.