To assist the Queen in carrying out her official duties on behalf of Canada, she appoints various people to her Canadian household. Along with the Canadian Secretary to the Queen, the monarch's entourage includes two ladies-in-waiting, the Canadian Equerry-in-Waiting to the Queen, the Queen's Police Officer, the Duke of Edinburgh's Police Officer, the Queen's Honorary Physician, the Queen's Honorary Dental Surgeon, and the Queen's Honorary Nursing Officer—the latter three being drawn from the Canadian Forces. Prince Edward, Earl of Wessex, also has a Canadian private secretary and his wife, Sophie, Countess of Wessex, a lady-in-waiting. Air transportation for the Royal Family is provided by the Royal Canadian Air Force 412 Transport Squadron.