In 1729, the Royal Naval Academy in Portsmouth – renamed the Royal Naval College in 1806 – was founded, for 40 students aged between 13 and 16, who would take three years to complete a course of study defined in an illustrated book, and would earn two years of sea time as part of their studies. The rating of midshipman-by-order, or midshipman ordinary, was used specifically for graduates of the Royal Naval College, to distinguish them from midshipmen who had served aboard ship, who were paid more. The school was unpopular in the Navy, because officers enjoyed the privilege of having servants and preferred the traditional method of training officers via apprenticeship.