The M/V Danielle Callais is equipped to service drilling, production, construction, seismic and dive support operations. The vessel has a maximum hull depth of 15 feet (4.5 m) and a working hull draft of 13 feet (4 m). It is capable of carrying 925 tons on its 132 foot by 40 foot (40 by 12 m ) clear deck. It is powered by two Caterpillar 3512-B main engines with a maximum 3,150  horsepower rating at 1,600 RPMs. Sea trials show speeds of 12 knots fully loaded and 13.5 knots light. The engine package was specifically designed to meet new EPA standards and comply with the company's own environmental goals.