Scale: 1/325
 
Includes 2 directors.
 
Recommended for: 
Frog 1/325 scale HMS Trafalgar
Novo 1/325 scale HMS Trafalgar 
Огонёк (Ogonek) 1/325 scale  Эскадренный миноносец ("Destroyer")
UPC 1/325 scale HMS Cadiz

Battle-class destroyers were fit with either a HACS Mk.VI director or a Mk.37 director.  Ships known to have carried the HACS Mk.VI director include:
HMAS Anzac
HMS Armada
HMS Barfleur
HMS Cadiz
HMS Camperdown
HMS Finisterre
HMS Gabbard
HMS Gravelines
HMS Hogue
HMS Lagos
HMS Sluys
HMS St. James
HMS St. Kitts
HMS Saintes
HMS Solebay
HMS Trafalgar
HMS Vigo
 
Battle-class destroyers known to have carried a Mk.37 director include:
HMS Agincourt
HMS Alamein
HMS Aisne
HMS Barrosa
HMS Matapan
HMS Corunna
HMS Dunkirk
 
A Mk.37 director for other ships of the class is available separately.
 
Mark VI High Angle Control System "HACS" Fire Control Directors are suitable for:
King George V class battleship HMS Anson as she appeared after her 1944-1945 refit
Minotaur-class cruisers HMCS Ontario and HMS Superb
Town-class light cruisers HMS Birmingham, HMS Newcastle, HMS Sheffield, post-war refit
Fiji-class light cruisers HMS Newfoundland (later as Peruvian Navy Ship Almirante Grau) and HMS Nigeria (later as Indian Navy Ship Mysore), post-war refit
the first sixteen Battle-class destroyers
all twenty-four "Ch" , "Co" and "Cr" flotilla C-class destroyers
Daring-class (1949) destroyers
Tribal-class destroyers HMCS Athabaskan (R79) and HMCS Cayuga
all four completed Weapon-class destroyers
 
From Wikipedia: "The High Angle Control System (HACS) was a British anti-aircraft fire-control system employed by the Royal Navy from 1931 onwards and used widely during World War II. HACS calculated the necessary deflection required to place an explosive shell in the location of a target flying at a known height, bearing and speed. HACS used various director towers that were generally equipped with Type 285 as it became available. This metric wavelength system employed six yagi antennas that could take ranges of targets, and take accurate readings of bearing using a technique known as "lobe switching" but only crude estimates of altitude. It could not, therefore, "lock on" to aerial targets and was unable to provide true blindfire capabilities, which no other navy was able to do until the USN developed advanced radars in 1944 using technology transfers from the UK. This situation was not remedied until the introduction of the HACS Mark VI director in 1944 that was fitted with centimetric Radar Type 275. Another improvement was the addition of Remote Power Control (RPC), in which the anti-aircraft guns automatically trained with the director tower, with the necessary changes in bearing and elevation to allow for convergent fire. Previously the gun crews had to follow mechanical pointers that indicated where the director tower wanted the guns to train."
 
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