Competition with Rio silver medallist cousins Jason Waterhouse and Lisa Darmanin should push both crews to greater heights. Read more
In the Women's division, the British pair has already secured the Gold.
The Kiwis have an amazing 34 points lead, while Outteridge and Jensen need to put a boat between themselves and Germany to take Silver.
A penalty turn on the final run almost cost Sante Lange and Cecelia Saroli (ARG) but they recovered to cross in sixth, just enough for the Gold.
Tonci Stipanovic attacked the Australian but Burton turned the tables.
Annalise Murphy was briefly in Gold medal position but was happy to settle for Silver after the disappointment of London.
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Brazilian hopes were boosted when Martine Grael and Kahana Kunze briefly hit the lead in the 49erFX.
Jake Lilley benefitted from the DSQ of a sailor who beat him in the final race, leap-frogging him into the medal race over a sailor who beat the bloke who was disqualified.
Leading after the first two races of the day, a 17th in the final race of the series makes a medal possible but the Gold unlikely.
The gap has blown out to 11 points with one more day of sailing before the medal race.
The British champion has a huge 24 point lead and the Silver also looks a foregone conclusion.
The womens division was close right to the end in the light conditions which favoured the good pumpers.
A second disqualification on their scorecard leaves them 20 points behind their British rivals with two or at most three more qualifying races left to sail.
A report was received last night of a gang of youths targeting Olympic tourists on Copacabana Beach and today a "suspicious package" was detonated outside the media centre.