[1][3][4] The Mobjack is a recreational sailing dinghy, built predominantly of fiberglass, with wood trim.

It has a fractional sloop rig, a plumb stem and transom, a transom-hung rudder controlled by a tiller and a folding centerboard.

[1] The boat has a draft of 4.00 ft (1.22 m) with the centerboard extended and 9 in (23 cm) with it retracted, allowing beaching or ground transportation on a trailer.

[1] For sailing the design may be equipped with a spinnaker of 240 sq ft (22 m2).

[1] The boat is supported by an active class club that organizes racing events, the International Mobjack Association.