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Queenstown Volunteer Fire Brigade senior firefighter Clare Mallard-Paul, qualified firefighter Samantha Wills and firefighters Laura Cross, Chloe MacMillan and Carla McLeod wore vests, trouser coveralls and smiles for a series of pictures by professional photographer and volunteer firefighter Shirley Nolan, of Pleasant Point, on board and near the historic steamship Earnslaw.
Firefighter Erin Gray and provisional firefighter Casey Huffstutler, of the Queenstown brigade, are also taking part, but were unavailable for the shoot on Saturday.
Miss Cross said she was happy to be asked to participate, but her first cautious question was "how naked do we have to get?"
It was the first photo shoot of a series destined for a tasteful 2012 calendar, to be published in October 2011, and distributed around the country and overseas.
The calendars will cost $10 each, plus postage, and profits will be donated to a charity to be decided.
The 2009 calendar raised $20,000 for the New Zealand Breast Cancer Foundation.
Frankton volunteer firefighters Donna Sullivan and Becks Wylie, with the snow-capped Remarkables in the background, were the only Southern firefighters to grace that calendar.
The New Zealand Westpac Rescue Helicopter service will benefit from the 2010 calendar, which features the six female firefighters in the Mossburn Volunteer Fire Brigade.
Ms Nolan began creating the New Zealand Female Firefighter calendars in 2008 to raise the profile of women firefighters and in response to seeing virtually all-male Fire Service calendars.
Calendars can be ordered at email@example.com.