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((about|naval architecture|other uses|Mack (disambiguation)))
((More citations needed|date=December 2008))
[[File:20030727 27 July 2003 DDG-168 Tachikaze Guided Missile Destroyer DDG Tachikaze Class 2 Odaiba Tokyo Japan.jpg|thumb|[[Tachikaze-class destroyer]] (1973) ((JS|Tachikaze|DDG-168|6))]]

In [[naval architecture]], a '''mack''' is a structure which combines the [[radar]] [[Mast (ship)#Modern masts|masts]] and the [[Funnel (ship)|exhaust stack]] of a surface ship, thereby saving the upper deck space used for separate funnels and the increasingly large tripod masts used to carry heavy radar [[Aerial (radio)|aerial]]s. The word is a composite ([[portmanteau]]) of "mast" and "stack". It is a common design feature on post-[[World War II]] [[warship]]s (e.g. the rebuilt [[Baltimore-class cruiser|''Baltimore''-class cruisers]]) and on some [[cruise ship]]s.

[[File:HMS Lincoln. 1972.jpg|thumb|((HMS|Lincoln|F99|6)) (1959)]]
The [[French Navy]] (''Marine Nationale'') used a combined exhaust stack and rear director mast on [[Richelieu-class battleship|''Richelieu''-class battleships]] in the late 1930s.<ref>((cite web | url=https://naval-encyclopedia.com/ww2/france/richelieu-class-battleships.php | title=Richelieu class battleships (1940) | date=28 February 2018 ))</ref> The [[Royal Navy]] used this design feature on the 1944 [[Weapon-class destroyer]]s and the subsequent [[Daring class destroyer (1949)|''Daring''-class destroyers]], and in the [[diesel-engine]]d [[Leopard class frigate|Type 41 "Cat" class]] and [[Salisbury class frigate|Type 61 "Cathedral" class]] [[frigate]]s of the 1950s. It provided unbalanced and unattractive designs, which led to a reversion to separate masts and funnels in subsequent RN vessels.

The close proximity of exhaust fumes to delicate radio and radar equipment led to [[corrosion]] problems, making macks unpopular for later designs.<ref>((cite web|title=CG-16 Leahy class|url=http://www.globalsecurity.org/military/systems/ship/cg-16.htm|accessdate=31 May 2016))</ref>

==References==
((Commons category|Macks (ship part)|Macks))
((Reflist))

[[Category:Shipbuilding]]

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