Islands Β· South East England
HMNB Portsmouth
In or near Portsmouth.
His Majesty's Naval Base, Portsmouth (HMNB Portsmouth) is one of three operating bases in the United Kingdom for the Royal Navy (the others being HMNB Clyde and HMNB Devonport). Portsmouth Naval Base

Basher Eyre β CC BY-SA 2.0 via Wikimedia Commons licence
Plan your visit
- Typical visit
- 4 hβ12 h
- Nearest railway station
- Portsmouth Harbour Β· 0.9 km
- Free entry
- Dog-friendly
Getting there & planning your visit
To visit HMNB Portsmouth, the nearest railway station is Portsmouth Harbour, located 0.9 km away. Entry to the site is free, and it is accessible for visitors. The postcode for sat-nav is PO1 3NW.
About
His Majesty's Naval Base, Portsmouth (HMNB Portsmouth) is one of three operating bases in the United Kingdom for the Royal Navy (the others being HMNB Clyde and HMNB Devonport). Portsmouth Naval Base is part of the city of Portsmouth; it is located on the eastern shore of Portsmouth Harbour, north of the Solent and the Isle of Wight. For centuries it was officially known as HM Dockyard, Portsmouth: as a Royal Navy Dockyard, Portsmouth functioned primarily as a state-owned facility for building, repairing and maintaining warships; for a time it was the largest industrial site in the world. From the 1970s, the term 'Naval Base' began to be used for Portsmouth (and other Royal Dockyards), acknowledging a greater focus on personnel and support elements alongside the traditional industrial emphases. In 1984 Portsmouth's Royal Dockyard function was significantly downsized and downgraded, and was formally renamed the 'Fleet Maintenance and Repair Organisation' (FMRO). The FMRO was privatised in 1998; in 2002, shipbuilding (which had not taken place on site since the late 1960s) resumed in the form of block construction, but this again ceased in 2014. Today, Portsmouth is the home base for two-thirds of the Royal Navy surface fleet, including the two aircraft carriers, HMS Queen Elizabeth and HMS Prince of Wales. Naval logistics, accommodation and messing are provided on site, with personnel support functions (e.g. medical and dental; education; pastoral and welfare) provided byβ¦
Photo gallery
Protected designations
- Site of Special Scientific Interest: Portsmouth Harbour SSSI
- Ramsar wetland: Portsmouth Harbour
Designations sourced from Natural England open data under OGL v3.
From the Wikipedia article
His Majesty's Naval Base, Portsmouth (HMNB Portsmouth) is one of three operating bases in the United Kingdom for the Royal Navy (the others being HMNB Clyde and HMNB Devonport). Portsmouth Naval Base is part of the city of Portsmouth; it is located on the eastern shore of Portsmouth Harbour, north of the Solent and the Isle of Wight. For centuries it was officially known as HM Dockyard, Portsmouth: as a Royal Navy Dockyard, Portsmouth functioned primarily as a state-owned facility for building, repairing and maintaining warships; for a time it was the largest industrial site in the world. From the 1970s, the term 'Naval Base' began to be used for Portsmouth (and other Royal Dockyards), acknowledging a greater focus on personnel and support elements alongside the traditional industrial emphases. In 1984 Portsmouth's Royal Dockyard function was significantly downsized and downgraded, and was formally renamed the 'Fleet Maintenance and Repair Organisation' (FMRO). The FMRO was privatised in 1998; in 2002, shipbuilding (which had not taken place on site since the late 1960s) resumed in the form of block construction, but this again ceased in 2014. Today, Portsmouth is the home base for two-thirds of the Royal Navy surface fleet, including the two aircraft carriers, HMS Queen Elizabeth and HMS Prince of Wales. Naval logistics, accommodation and messing are provided on site, with personnel support functions (e.g. medical and dental; education; pastoral and welfare) provided by Defence Equipment and Support. Other functions and departments, e.g. Navy Command Headquarters support staff, are also accommodated within the Naval Base. The base is additionally home to a number of commercial shore activities, including the ship repair and maintenance facility operated by BAE Systems Maritime Services. The base is the oldest in the Royal Navy, and it has been an important part of the Senior Service's history and the defence of the British Isles for centuries. It is home to one ofβ¦
Excerpt from Wikipedia under CC BY-SA 4.0. See the source article linked in Sources below.
Background
History
in May 1790.]] Along with Woolwich, Deptford, Chatham and Plymouth, Portsmouth has been one of the main Royal Navy Dockyards or Bases throughout its history.
Description
The second half of the eighteenth century was a key period in the development of Portsmouth (and indeed of the other Royal Dockyards). A substantial planned programme of expansion and modernisation was undertaken from 1761 onwards, driven (as would be future periods of expansion) by increases both in the size of individual ships and in the overall size of the fleet. In the 1760s the Lower Wet Dock (by then known as the Great Basin) was deepened, the Great Stone Dock was rebuilt and a new dry dock (known today as No 4 dock) was built alongside it over a five-year period from 1767. During 1771β76 the former Upper Wet Dock was reconfigured to serve as a reservoir into which water from the dryβ¦
Sourced from Wikipedia under CC BY-SA 4.0.
- Coordinates
- 50.8042, -1.1025
- District
- Portsmouth
- Parish
- Portsmouth, unparished area
- Postcode
- PO1 3NW
- Parliamentary constituency
- Portsmouth South
- Established
- 1194
- Nearest railway station
- Portsmouth Harbour β 0.9 km
Sources
- wikipedia: HMNB Portsmouth (CC BY-SA 4.0)
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HMNB Portsmouth
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Frequently asked questions
- Where is HMNB Portsmouth?
- HMNB Portsmouth is in South-East England, United Kingdom (postcode PO1 3NW), in the parish of Portsmouth, unparished area.
- What is HMNB Portsmouth?
- His Majesty's Naval Base, Portsmouth (HMNB Portsmouth) is one of three operating bases in the United Kingdom for the Royal Navy (the others being HMNB Clyde and HMNB Devonport). Portsmouth Naval Base
- How do I get to HMNB Portsmouth?
- The nearest railway station is Portsmouth Harbour, about 0.9 km away. Drivers can use postcode PO1 3NW.
- When was HMNB Portsmouth built?
- Built or established in 1194.
- Who owns HMNB Portsmouth?
- HMNB Portsmouth is owned by Royal Navy.
- Is HMNB Portsmouth a protected site?
- Yes β HMNB Portsmouth is part of the Portsmouth Harbour SSSI Site of Special Scientific Interest and the Portsmouth Harbour Ramsar wetland.
- Is HMNB Portsmouth free to visit?
- Yes, HMNB Portsmouth is free to enter.
- How do I get to HMNB Portsmouth?
- The nearest railway station is Portsmouth Harbour, about 0.9 km away. Drivers can navigate to postcode PO1 3NW.