The John O'Shea trained filly proved too strong for the favourite Overstep, forging clear to win the 1250 metre sprint by more than a length.
"She's a real little professional and tough as nails which she showed today,"
said stable representative Darren Beadman."She's only little, but has plenty of determination like her Dad."
A homebred for Darley, Precautions is entered for the Group I MRC Thousand Guineas and is a half-sister to stakes-winner Knoydart from Group I STC Coolmore Classic winner Regal Cheer.
Regal Cheer was bought off the track as a broodmare by Darley back in 2007 for $900,000 at the Inglis Broodmare Sale and has produced five foals to race and all have won.
Regal Cheer has a Sepoy weanling filly, but unfortunately missed to Brazen Beau last year.
Godolphin made it a winning double in the next race with lightly raced four year-old Exceed and Excel gelding Chetwood scoring easily at his first run back from a break.
With two wins from four starts, Chetwood has a bright future, but there is no rush to push quickly into stakes company.
"He's got a bit stronger this time. He'll go through his grades now and I think he will be really suited when he gets to Rosehill over a little bit further and can get into a nice rhythm," O'Shea said.
