| Flag | USA |
| Rig | Schooner, 3-masted |
| Homeport | Milwaukee, WI |
| Sparred Length | 137' |
| LOA | 99' |
| LOD | 98' |
| LWL | 88'4" |
| Draft | 8'9" |
| Beam | 24' |
| Rig Height | 95' |
| Sail Area | 5,916 sq ft |
| Tons | 99 GRT |
| Power | Twin 180 HP diesels |
| Hull | Wood |
Denis Sullivan (U.S.) is a traditional Great Lakes topsail schooner of the type once common on the Great Lakes, She flies a triangular square-rigged tops’l on her 95-foot foremast, and carries students and the general public on educational day sails and private charters for Discovery World Ltd. of Milwaukee, WI. At 137 feet in length, the three-masted wooden schooner sails with a crew of 10 and offers programs on sailing, history, ecology, marine science and professional development for educators. She will be berthed at Canalside.
| Season | Year-round |
| Designer | Timothy Graul |
| Built | 2000 |
| Coast Guard Certification |
Passenger Vessel (Sub T), Sailing School Vessel (Sub R) |
| Crew | 10 |
| Trainees/ Passengers | 50 daysails, 16 overnight |
| Contact Person | Jeff Phillips, Marine Ops Mgr |
| Organization | Discovery World |
| Address | 500 North Harbor Drive Milwaukee, WI, 53202, USA |
| Telephone | (414) 765-8641 |
| Fax | (414) 765-0311 |
| JPhillips@discoveryworld.org | |
| Website | www.discoveryworld.org |