8 inch/55 Mark 16 (203 mm)

8 inch/55 Mark 16 cannons on the USS Newport News

Description

Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Compile a list of air, ground, or naval vehicles that feature this weapon system in the game.

Vehicles equipped with this weapon

• USS Des Moines
• USS Newport News

General info

Tell us about the tactical and technical characteristics of the cannon or machine gun.

Available ammunition

Describe the shells that are available for the weapon and their features and purpose. If it concerns autocannons or machine guns, write about different ammo belts and what is inside (which types of shells).

Penetration statistics
Ammunition	Type of warhead	Penetration @ 0° Angle of Attack (mm)
		1,000 m	2,500 m	5,000 m	7,500 m	10,000 m	15,000 m
Mk.14 Common	Common	110	98	80	66	56	43
Mk.21 APCBC	APCBC	390	348	289	243	207	165
Mk.25 HC	HE	61	61	61	61	61	61
Mk.17 SP Common	SP Common	131	116	95	79	66	50

Shell details
Ammunition	Type of warhead	Velocity (m/s)	Projectile mass (kg)	Fuse delay (s)	Fuse sensitivity (mm)	Explosive mass (TNT equivalent) (kg)	Ricochet
							0%	50%	100%
Mk.14 Common	Common	823	117.9	0.035	9	4.84	47°	60°	65°
Mk.21 APCBC	APCBC	762	151.9	0.035	9	2.21	48°	63°	71°
Mk.25 HC	HE	823	117.9	0	0.1	9.49	79°	80°	81°
Mk.17 SP Common	SP Common	823	117.9	0.035	9	4.61	48°	63°	71°

Comparison with analogues

Give a comparative description of cannons/machine guns that have firepower equal to this weapon.

Usage in battles

Describe the cannon/machine gun in the game - its distinctive features, tactics of usage against notable opponents. Please don't write a "guide" - do not impose a single point of view, but give the reader food for thought.

Pros and cons

Summarise and briefly evaluate the weaponry in terms of its characteristics and combat effectiveness. Mark pros and cons as a list.

Pros:

Cons:

History

The United States was not idle during World War II in the field of weapons development. When the Invasion of Poland in September 1939 threw the London Naval Treaties out the window, the US ordered the Baltimore-class heavy cruisers. Their follow-up to the Baltimore-class was developed during the war and the Des Moines-class introduced the innovative 8-inch/55 Mark 16 guns into service. Unlike the earlier 8-inch guns mounted on the Treaty cruisers of the inter-war period or the Baltimore-class, the Mark 16 used a separate projectile and bagged charge along with an autoloading mechanism that gave it twice the rate of fire of its older siblings at eight shots per minute per barrel. The Mark 16 was also notable for being the first US Navy gun to use a loose-liner construction and for using a wedge-type vertical sliding breech block instead of the conventional interrupted screw design. The autoloading mechanism also allowed the guns to serve in the anti-aircraft role. The maximum range of the Mark 16 was 17 miles for a 260-pound shell at an elevation of 41 degrees. 

Development of these guns began in 1943 which was the same year the first two Des Moines-class ships (USS Des Moines and USS Salem) were ordered. However, the ships wouldn’t emerge after dry dock until 1948 after the war ended and so only three of the planned twelve ships were completed (the aforementioned Des Moines and Salem along with the USS Newport News). Despite the advent of guided missile ships superseding the existence of heavy cruisers with big gun armaments in the post-war era, the Mark 16 still managed to prove its worth on the battlefield. While the Des Moines and Salem enjoyed relatively quiet careers having never fired their guns in anger, the USS Newport News did see combat using the Mark 16 guns in the role of naval gunfire support. The Newport News first participated in Operation Sea Dragon in October 1967, where it bombarded 325 NVA shore targets in 126 strikes including trucks, bridges, and roads. The ship's spotters recorded the destruction of 17 logistics craft and another 14 damaged. After the end of Operation Sea Dragon, Newport News expended almost 60,000 high-explosive rounds from its guns while supporting the Third Marine Division at the DMZ (De-Militarized Zone). On her second tour, the Mark 16 guns from this ship supported the ARVN forces (Army of the Republic of Vietnam) near DMZ and Vînh Bînh Province on December 25th, 1968. In her last tour of duty, the USS Newport News participated in the bombardment of Haiphong Harbor in North Vietnam during Operation Custom Tailor in 1972. 

Unfortunately, the Mark 16 cannons were also the reason that the USS Newport News was forced to retire. One of the turrets blew up during actions off the DMZ, in October 1972 due to a faulty fuse. As the spare turret guns were already scrapped and it is deemed too expensive to refit the ship with the turrets from her decommissioned sister ships. The turret was therefore closed off for the rest of the ship’s career. Ultimately the development of guided missiles made the role of heavy cruisers such as the Des Moines-class obsolete and the USS Newport News, the last ship in the class to be in service, was decommissioned in 1975. This event was not the end of the Mark 16’s career as the desire for larger naval guns for shore bombardment led to the development of the Mark 71 8-inch gun. A single-gun adaptation of the Mark 16, this cannon was taken from decommissioned Des Moines-class heavy cruisers and mounted on the Forest Sherman-class destroyer, USS Hull as a replacement for the Des Moines-class. The Mark 71 only existed in the prototype stage and was canceled in 1978. 

Media

Excellent additions to the article would be video guides, screenshots from the game, and photos.

See also

Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:

• reference to the article about the variant of the cannon/machine gun;
• references to approximate analogues by other nations and research trees.

External links

Paste links to sources and external resources, such as:

• topic on the official game forum;
• other literature.