The 134 meter long, 12711 gt research vessel Akademik Tryoshnikov went aground in the harbor at Montevideo, Uruguay.   The vessel was maneuvering between berths in the harbor when it went aground.   No reports of injuries, damage or pollution released.   The Akademik Tryoshnikov was quickly refloated and proceeded to dock.   Reports state a pilot was on board at the time of the grounding.   The Akademik Tryoshnikov was built in 2012 and is scheduled to depart for Antarctica from Montevideo.