| Name | John McDonnell | | Category | Special service ships - Research ships | | Call sign | NJMD | | Flag | United States | | Year of built | 1991 | | Place of built | United States | | Length, m | 57.91 | | Width, m | 13.71 | | Draught, m | 3.99 | | Deadweight, t | 857 | | Gross tonnage | 1,767 |
| | Shipbuilder | Halter Marine Moss Point, Mississippi | | Main engine type | GM EMD 12-645E6 | | Main engine power, h.p. | 2,500 | | Speed, kts | 12.7 | | Owner | Military Sealift Command, USA | | Operator | Military Sealift Command, USA | | Status | Laid up |
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