Question: Which northwest Adelaide suburb, and birthplace of Mark Harrity the fast bowler, shares its name with a system of flag signalling?

Context paragraphs:
Frederick Marryat: Captain Frederick Marryat (10 July 17929 August 1848) was a British Royal Navy officer, a novelist, and an acquaintance of Charles Dickens.  He is noted today as an early pioneer of the sea story, particularly for his semi-autobiographical novel "Mr Midshipman Easy" (1836), for his children's novel "The Children of the New Forest" (1847), and for a widely used system of maritime flag signalling, known as Marryat's Code.

Mark Jonkman: Mark Benjamin Sebastiaan Jonkman (born 20 March 1986 in The Hague, Zuid-Holland) is a Dutch cricketer.  He is a right-arm fast bowler who has modelled his action on Australian fast bowler Brett Lee.

Naval flag signalling: Naval flag signalling covers various forms of flag signalling, such as semaphore or flaghoist, used by various navies; distinguished from maritime flag signalling by merchant or other non-naval vessels or flags used for identification.

Mohammad Irfan: Mohammad Irfan (Urdu: ‎ ) (born 6 June 1982) is a Pakistani left arm fast bowler.  He is very notable for his height and pace.  His height of 7'1" (216 cm) makes him the tallest player to play first-class and international cricket, a title that was previously shared by former West Indian fast bowler Joel Garner and Australian pace bowler Bruce Reid, both of whom are 6'8" (203 cm).

Semaphore, South Australia: Semaphore is a suburb in the Australian state of South Australia located in north-west of Adelaide on the Gulf St Vincent coastline of the LeFevre Peninsula about 14 km from the Adelaide city centre.

Maritime flag signalling: Maritime flag signalling, generally flaghoist signalling, is the principal means other than radio by which ships communicate to each other or to shore (distinguished from flags showing nationality, ownership, or (for naval vessels) organizational status).  Virtually all signalling by non-naval vessels is now organized under the International Code of Signals (whether by flaghoist, semaphore, signal lamp, or other means), which specifies a standard set of flags and codes.  Naval vessels generally use an extended set of flags and their own codes.  This article will touch on the historical development of maritime flag signalling.

Morné Morkel: Morné Morkel (born 6 October 1984) is a South African cricketer who plays Test and limited overs cricket for South Africa and represents Kolkata Knight Riders in the Indian Premier League.  He is a right-arm fast bowler with "genuine pace" according to former South African fast bowler Allan Donald, and a useful lower order left-handed batsman.  However, after a poor run of form, Morkel was dropped from the Test team in 2009.  His elder brother Albie Morkel took his place.  He regained his Test place in 2010.  He was dropped again in 2015 due to injury concerns, his return in 2016 and 2017 was due to Dale Steyn's being kept out of the side due to injury concerns.

Kent County Cricket Club in 2011: In 2011, Kent County Cricket Club competed in Division Two of the County Championship, Group A of the 40-over Clydesdale Bank 40 and the South Group of the Friends Life t20.  Kent also hosted a Twenty20 match at the St Lawrence Ground against the touring Indians, and a three-day first-class MCC Universities match against Loughborough MCCU, also at the St Lawrence Ground.  It was the second and final season in charge for Director of Cricket Paul Farbrace.  The club captain was former England batsman Rob Key who had been club captain since 2006.  Pakistan fast bowler Wahab Riaz joined Kent as their overseas player in June, and another fast bowler, South African Charl Langeveldt, signed as Kent's second overseas player for the Friends Life t20 competition only.

International Code of Signals: The International Code of Signals (ICS) is an international system of signals and codes for use by vessels to communicate important messages regarding safety of navigation and related matters.  Signals can be sent by flaghoist, signal lamp ("blinker"), flag semaphore, radiotelegraphy, and radiotelephony.  The International Code is the most recent evolution of a wide variety of maritime flag signalling systems.

Mark Harrity: Mark Andrew Harrity (born 9 March 1974) is a former Australian cricketer.  He was born in Semaphore, a suburb of Adelaide.  He was a very fast bowler but one who has seen his career repeatedly interrupted by injury.  Unusually in the modern game, he was an extremely poor batsman even by the standards of specialist bowlers: in over 100 innings in first-class and List A level he never even reached 20.

Supporting paragraphs: Mark Harrity Semaphore, South Australia
Answer: Semaphore