Question: South Channel Fort is located 6 km north-east of a town on the shores of what port?

full_context: Document 1: South Channel Fort: South Channel Fort, also known as South Channel Island, is a 0.7 ha artificial island in southern Port Phillip, Victoria, Australia, 6 km north-east of the town of Sorrento. It was part of a network of fortifications protecting the narrow entrance to Port Phillip.
Document 2: Sorrento, Victoria: Sorrento is a township in Victoria, Australia, located on the shores of Port Phillip on the Mornington Peninsula, about one and a half hours by car south of Melbourne. It is a largely upper-class, seaside resort area, but is also a quiet seaside township in the off-peak months of the year. It was named by the Italian founders after the southern Italian town.
Document 3: Brighton, Victoria: Brighton is an affluent beach-side suburb of Melbourne, Victoria, Australia, 11 km south-east of Melbourne's central business district. Its local government area is the City of Bayside. At the 2011 Census, Brighton had a population of 21,257. Brighton is named after Brighton in England.
Document 4: Port Noarlunga, South Australia: Port Noarlunga is a suburb in the City of Onkaparinga, South Australia. It is a small sea-side suburb, population 2,632, about 30 km to the south of the Adelaide city centre and was originally created as a sea port. This area is now popular as a holiday destination or for permanent residents wishing to commute to Adelaide or work locally. There is a jetty that connects to a 1.6 km long natural reef that is exposed at low tide. The beach is large and very long and has reasonable surfing in the South Port area whose name is taken from its location - 'South of the Port'.
Document 5: Port Melbourne, Victoria: Port Melbourne is an inner suburb of Melbourne, Australia, 5 km south-west from Melbourne's Central Business District. It is split between the local government areas of Melbourne and Port Phillip. The area to the north of the West Gate Freeway is in the City of Melbourne. The area to the south is in the City of Port Phillip. At the 2011 Census, Port Melbourne had a population of 14,521.
Document 6: Southbank, Victoria: Southbank is an inner urban neighbourhood of Melbourne, Victoria, Australia, 1 km south of Melbourne's central business district. Its local government area are the Cities of Melbourne and Port Phillip. At the 2011 Census, Southbank had a population of 11,235. Its northernmost area is considered part of the Central Business District and Central Activities District of the City. Southbank is bordered to the north by the Yarra River, and to the east by St Kilda Road. Southbank's southern and western borders are bounded by Dorcas Street, Kings Way, the West Gate Freeway and Montague Street.
Document 7: Melbourne: Melbourne ( ) is the capital and most populous city of the Australian state of Victoria, and the second-most populous city in Australia and Oceania. The name "Melbourne" covers an urban agglomeration spanning 2664 km2 , which comprises the broader metropolitan area, as well as being the common name for its city centre. The metropolis is located on the large natural bay of Port Phillip and expands into the hinterlands towards the Dandenong and Macedon mountain ranges, Mornington Peninsula and Yarra Valley. Melbourne consists of 31 municipalities. It has a population of 4,641,636 as of 2016 , and its inhabitants are called Melburnians.
Document 8: Fort Queenscliff: Fort Queenscliff, in Victoria, Australia, dates from 1860 when an open battery was constructed on Shortland's Bluff to defend the entrance to Port Phillip. The Fort, which underwent major redevelopment in the late 1870s and 1880s, became the headquarters for an extensive chain of forts around Port Phillip Heads. Its garrison included volunteer artillery, engineers, infantry and naval militia, and it was manned as a coastal defence installation continuously from 1883 to 1946. The other fortifications and armaments around the Heads were completed by 1891, and together made Port Phillip one of the most heavily defended harbours in the British Empire.
Document 9: Flinders Chase, South Australia: Flinders Chase is a locality in the Australian state of South Australia located on the south-western coast of Kangaroo Island overlooking the body of water known in Australia as the Southern Ocean and by international authorities as the Great Australian Bight. It is located about 210 km south-west of the state capital of Adelaide.
Document 10: Southsea Castle: Southsea Castle, historically also known as Chaderton Castle, South Castle and Portsea Castle, is an artillery fort originally constructed by Henry VIII on Portsea Island, Hampshire, in 1544. It formed part of the King's Device programme to protect against invasion from France and the Holy Roman Empire, and defended the Solent and the eastern approach to Portsmouth. The castle had a square central keep, two rectangular gun platforms to the east and west, and two angled bastions to the front and rear, and was an early English example of the "trace italienne"-style of fortification popular on the Continent. The Cowdray engraving of the Battle of the Solent in 1545 depicted Henry VIII visiting the castle. Despite several serious fires, it remained in service and saw brief action at the start of the English Civil War in 1642 when it was stormed by Parliamentary forces.
Document 11: Garden City, Victoria: Garden City is a residential area of Melbourne located in the municipality of Port Phillip 5 km south-west of the Melbourne CBD and immediately west of Port Melbourne. It was created as a planned residential development initially by the State Bank of Victoria and subsequently developed by the Housing Commission of Victoria between 1926 and 1940.
Document 12: Flakfortet: Flakfortet, meaning sand-shoal fortress, is a sea fort located on the artificially built island of "Saltholmrev", in the Øresund between Copenhagen and Saltholm. The island and fort are simply known as "Flakfortet"; the name of the island; "Saltholmrev", meaning the reef near Saltholm, is seldom used.
Document 13: Port Melbourne, Victoria: Port Melbourne is an inner suburb of Melbourne, Australia, 5 km south-west from Melbourne's Central Business District. It is split between the local government areas of Melbourne and Port Phillip. The area to the north of the West Gate Freeway is in the City of Melbourne. The area to the south is in the City of Port Phillip. At the 2011 Census, Port Melbourne had a population of 14,521.
Document 14: Torrens Island: Torrens Island is an island in the Australian state of South Australia located in the Port River Estuary between the Port River and Barker Inlet, about 15 km northwest of the state capital of Adelaide. Since European settlement of Adelaide in 1836, it has been used for a number of purposes.
Document 15: Granite Island (South Australia): Granite Island, also known by the Ramindjeri people as Nulcoowarra, is a small island next to Victor Harbor, South Australia, about 80 km south of South Australia's capital city, Adelaide. Although there are no permanent residents, there are buildings and shelters on the island, including a cafe. It is a popular tourist attraction, particularly for people wishing to see little penguins (commonly called "fairy penguins") which live there. The island also supported resident wallabies in the 1980s which captivated visiting tourists. The island is accessible across a causeway from the mainland, either on foot or by catching an antique horse-drawn tram. As of 2015, the private company Oceanic Victor intends to use the island as a departure point to ferry tourists to a new tourist attraction in adjacent waters. Tourists will be able to enter an aquaculture seacage where they will be able to swim with and hand feed southern bluefin tuna, and observe other South Australian marine species.
ground_truth: Port Phillip