In contemporary use, it is a personal attendant, usually upon a sovereign, a member of a royal family, or a national representative.
[4] Squadron Leader Marcel 'Shagga' Scott of the Royal New Zealand Air Force served as equerry to HRH Prince Charles in November 2012.
In the UK equerries are appointed by working members of the royal family and are drawn from junior officers of the British Armed Forces (normally captains or majors).
The role involves being in regular close attendance both within the royal residence and outside on public engagements.
The Crown Equerry is in charge of the Royal Mews Department and holds a distinct office.
At the time of King Charles III's accession to the throne, the 'Household of the former Prince of Wales and Duchess of Cornwall' included two equerries.