University Royal Naval Unit URNU they fall under the overall jurisdiction of Captain BRNC (the officer-in-charge of the Britannia Royal Naval College), Dartmouth. Each URNU is commanded by a Lieutenant RN, Lieutenant Commander or RM Captain, and is associated with a P2000 patrol boat of the 1st Patrol Boat Squadron. Each URNU comprises 51 undergraduates who join for the duration of their degree, with the option of taking years out or leaving at any time. Undergraduates join for three years, or in some cases the duration of their course. Members hold the rank of honorary Midshipman in the Royal Naval Reserve. A notable difference
Royal Naval College, Greenwich Christopher Wren and built between 1696 and 1712, then intended to serve as the Greenwich Hospital, a home for disabled sailors. This closed in 1869, when the pensioners were transferred to other places, leaving the buildings available for a new use. The site of the former hospital had once been occupied by the medieval Palace of Placentia, or "Palace at Greenwich", begun by Humphrey, Duke of Gloucester, in 1428. After the Royal Navy departed in 1998 the buildings were opened to the public as the Old Royal Naval College. The President of the College was a full-time post until 1982