The Mark is a single-hander class of small sailing dinghy.
[1] Her performance is slower than an OK upwind due to her lighter weight (130lbs.)
The Mark is 12 feet (3.7 m) in length, with forward and side buoyancy compartments.
A 19 feet (5.8 m) free-standing rotating mast stepped far forward in the front buoyancy compartment supports a mainsail which features a MK symbol to identify the boat.
Strong efforts were made to expand the class to the Republic of Ireland by making her available to potential buyers at Broadmeadow Estuary in Malahide.