HMS Invincible (1747)

HMS Cambrian was a boom defence vessel of the Royal Navy in the Second World War. She was built by Cochrane and Sons of Selby, Yorkshire in 1924 as the fishing trawler Lord Derby. She operated on the Yorkshire coast fishery and was renamed Ocean Knight in 1935 and Stella Procyon in 1939. Shortly after the outbreak of the Second World War she was requisitioned by the Admiralty and commissioned into the Royal Navy as HMS Cambrian. Cambrian served on the defence booms around Portsmouth and was sunk there on 30 May 1940 after striking a naval mine, with the loss of 23 of her crew. Parts of the wreck remain in the Solent and are marked by a buoy.

The sixth HMS Hazard was a Dryad-class torpedo gunboat of the Royal Navy. She was launched in 1894 and was converted into the world's first submarine depot ship in 1901. She collided with the submarine A3 on 2 February 1912, killing 14 men, and was herself sunk in collision with SS Western Australia on 28 January 1918.

SM UB-21 was a German Type UB II submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. The U-boat was ordered on 30 April 1915 and launched on 26 September 1915. She was commissioned into the German Imperial Navy on 20 February 1916 as SM UB-21. The submarine sank 33 ships in 26 patrols for a total of 36,764 gross register tons (GRT). Surrendered to Britain in accordance with the requirements of the Armistice with Germany, UB-21 was sunk as a target by HMS Terror in the Solent on 30 September 1920; the wreck was sold in 1970 and most had been cleared by 1998, although some remnants survive.

Horse Sand Fort is one of the larger Royal Commission sea forts in the Solent off Portsmouth, Hampshire, England. The fort is one of four built as part of the Palmerston Forts constructions. It is 200 feet (61 m) across, built between 1865 and 1880, with two floors and a basement and armour-plated all round.

Eastney is a district in the south-east corner of Portsmouth, England, on Portsea Island. Its electoral ward is called Eastney and Craneswater. At the 2011 Census the population of this ward was 13,591.

The Royal Marines Museum is a museum on the history of the Royal Marines from their beginnings in 1664 through to the present day. A registered charity, it is also a designated service museum under the terms of the National Heritage Act 1983 and receives Grant-in-Aid from the Ministry of Defence. During 2011 it formally became part of the National Museum of the Royal Navy, an executive non-departmental public body of the Ministry of Defence. The museum's galleries are currently closed, pending relocation.

Eastney Barracks was a military installation occupied by the Royal Marines and located at Eastney near Portsmouth.

Eastney Beam Engine House is a Grade II -listed Victorian engine house in Portsmouth, Hampshire, England. Dating from 1887, it contains two 150 hp James Watt & Co. beam engines. The pumps were built as part of a plan to improve Portsmouth's sewage system. The other element of the plan was large holding tanks which held the sewage until the pumps could empty them into the ebb tide. The pumps have since been superseded by advancing technology but have been restored (in 1980). The restoration was funded by grants totalling £10,066 from Portsmouth city council, £4000 from Hampshire county council and £2000 from the Department of the Environment. The Engine House is now open to the public as a museum, owned by Portsmouth City Council (Museums Service) but operated by volunteers; consequently is only open on the last weekend in every month.

Fort Cumberland is a pentagonal artillery fortification erected to guard the entrance to Langstone Harbour, east of the Dockyard of Portsmouth on the south coast of England. It was sited to protect the Royal Navy Dockyard, by preventing enemy forces from landing in Langstone Harbour and attacking from the landward side. Fort Cumberland is widely recognised as the finest example of a bastion trace fort in England. It is a scheduled monument and a Grade II* listed building

Lumps Fort is a disused fortification built on Portsea Island as part of the defences for the naval base at Portsmouth.

Sinah Common is a 243-hectare (600-acre) biological Site of Special Scientific Interest on Hayling Island in Hampshire, England.This coastal site has maritime shingle grassland, some of which is rich in lichens, sand dunes, heath and saltmarsh. It has also been designated an SSSI because of its population of the endangered flowering plant childing pink at one of only two sites in Britain, and for its outstanding assemblage of other nationally scarce plants. There are also populations of nationally rare and scarce invertebrates.It lies adjacent to the Sinah Common World War II Heavy Anti-aircraft gunsite, a scheduled monument, with a small overlap.

The South Parade Pier is a pier in Portsmouth, England. It is one of two piers in the city, the other being Clarence Pier. The pier once had a long hall down its centre which housed a seating area and a small restaurant. The outside of the hall is a promenade which runs the length of the pier. Once fallen into disrepair, as of 2017, the pier has been developed into an amusement arcade and food outlet. The South Parade Pier, in Southsea, part of the English city of Portsmouth, is a pleasure pier offering typical seaside attractions including souvenir shops, ice creams, indoor amusements and a small children's funfair. It also contains a fishing deck and two function rooms which are often used for live music.