The victory follows the Rams upset win over Vic Country last weekend in Sydney.
Little separated the two teams all day with just one point the difference at half time, before the Rams opened up a slight break in the third quarter taking a nine point advantage into the last.
A three goal to two final quarter to NSW/ACT was enough to shake a determined Tasmania who had defeated the Rams in the final of the Division Two qualifying series in May.
The win was made all the more meritorious with the early loss of key onballers, Geelong Scholarship holder Ranga Ediriwickrama (hamstring) and Luke Breust (leg).
NSW/ACT defenders Josh Bryce, Kade Klemke and Collingwood Scholarship holder Scott Reed were outstanding for the Rams, along with onballer Dillon McNeil who gathered an impressive 17 disposals. His long goal with just five minutes remaining all but sealed victory for the Rams.
Tasmanian Captain Tom Salter worked hard for 20 disposals to be the Mariners best player.
NSW/ACT now join Vic Metro and Western Australia on top of the division one table with two wins.
Remaining matches in round three will be played next weekend with Western Australia hosting Vic Country and South Australia clashing with Vic Metro at Adelaide Oval.
Both NSW/ACT and Tasmania earned the right to compete in the Division One Championships as the top two qualifiers from the Division Two Championships played in May.
NSW/ACT 2.2 5.4 8.7 11.8 (74)
Tasmania 2.2 5.3 7.4 9.8 (62)
GOALS
NSW/ACT: Foster 3, Gordon 2, Clisby, Spiteri, Ruffles, Klemke, Duryea, McNeil
Tasmania: Robinson 2, McCulloch 2, Harwood 2, Cox, Archer, Milne
BEST
NSW/ACT: Bryce, McNeil, Frail, Reed, Foster, Kirkwood, Klemke
Tasmania: Salter, Williams, Allwright, Crichton, Symmons, O’Brien
