After the first 10-12 boats were completed, it was then built under contract by Johnson Boatworks on behalf of Impulse Marine.
It has a fractional sloop rig, a raked stem, a cut-out, walk-through, sharply reverse transom that allows ease of boarding, an internally mounted spade-type rudder controlled by a tiller and a fixed fin keel.
[1] The design has only a small cuddy cabin for sail and cooler stowage and no sleeping accommodation.
[3] In a 1994 review Richard Sherwood wrote, "a day sailer with room for lots of crew, the Impulse’s most unusual feature is a center console housing the control lines for the jib sheet, jib traveler, jib Cunningham, main Cunningham, boom vang, spinnaker halyard, spinnaker retriever, and backstay adjustments.
The cockpit is 9 feet long, with seating on the wide decks ... Keel depth is moderate, so that Impulse may be trailered.