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Wilmington in New Hanover County, North Carolina — The American South (South Atlantic)
 

20MM Anti-Aircraft Guns

U.S.S. North Carolina

 
 
20MM Anti-Aircraft Guns Marker image. Click for full size.
Photographed by Brandon D Cross
1. 20MM Anti-Aircraft Guns Marker
Inscription. The North Carolina had between 40 and 60 Swiss Oerlikon 20mm anti-aircraft guns. They replaced the less effective .50 caliber guns. Most of the 20mm mounts were single guns but there were a few twin mounts. Four men operated each air-cooled gun: gunner, spotter, trunnion operator, and loader.

All the guns required ammunition handlers during battle. Sailors from different rates were assigned to the guns to supply the ammunition from the magazines and/or clipping rooms. Battle Stations for Stewards Mates were in the 16-inch and 40mm gun magazines, the 20mm clipping rooms, and in Damage Control Repair Units.

Uncommon Heroes
The Stewards Branch was a racially segregated part of the U.S. Navy. Steward's Mate 2/c John Seagraves was an officer's cook in the Wardroom Pantry. His battle station was in a 16-inch magazine along with other men in the Stewards Branch. He asked the XO if he and other Steward's Mates could be 20mm gunners. Their petition was granted, and eight men began training on two 20mm gun mounts in the fall of 1944. The mounts were in Marine Sergeant Harry Clark's sector.

In April 1945, the Battleship
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was with the task group supporting the Okinawa operation. Japanese kamikazes were a constant threat. In one engagement Harry Simpson (trunnion operator) spied the enemy flying toward the North Carolina. When given the order to fire John Seagraves (gunner) squeezed the trigger. The 20mm and 40mm batteries opened fire. The plane crashed into the sea narrowly missing the Battleship.

The men returned to their duty stations but were quickly called back to the mounts to stage the event. But in the re-creation the men were not in their original positions.

"Shooting a plane down was not a matter of being afraid he would fail. John and the gun crew did what they were trained to do. John finally proved to himself and many others that he could do the job as a gunner."
Uncommon Hero: The John Seagraves Story, By David Seagraves
(caption)
Below: 1) Sgt. Harry Clark, 2) John Seagraves, 3) Hansel Simpson Jr.

 
Erected by Friends of the Battleship North Carolina.
 
Topics. This historical marker is listed in these topic lists: African AmericansWar, World IIWaterways & Vessels. A significant historical month for this entry is April 1945.
 
Location. 34° 14.184′ N,
20MM Anti-Aircraft Guns Marker image. Click for full size.
Photographed by Brandon D Cross
2. 20MM Anti-Aircraft Guns Marker
77° 57.284′ W. Marker is in Wilmington, North Carolina, in New Hanover County. It is on Battleship Rd NE 0.2 miles south of U.S.S. North Carolina Road, on the left when traveling north. Touch for map. Marker is at or near this postal address: 1 Battleship Rd NE, Wilmington NC 28401, United States of America. Touch for directions.

Regionally, this marker is in North Carolina’s Coastal Plain and on the Cape Fear Coast. It is also in the American South, specifically in the Upper South, and in the Tidewater. Globally, it is in the North Atlantic Region, North America, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once the territory of the Mississippian Culture, one of the original Thirteen Colonies, one of the Confederate States of America, and the Antebellum South.

Other nearby markers. At least 8 other markers are within walking distance of this marker: 20mm Clipping Room (a few steps from this marker); 1.1-inch Quadruple Mount Gun (a few steps from this marker); The Captains of the USS North Carolina (a few steps from this marker);
20MM Anti-Aircraft Gun aboard USS North Carolina image. Click for full size.
via Historylink101, unknown
3. 20MM Anti-Aircraft Gun aboard USS North Carolina
Disclaimer: "These images are from the personal collection of Eric Rymer. These images are royalty free for educational use. Please use the following notation on the bottom of an any web page or presentation where images are used. Images are Copyrighted by Historylink101.com and can be found at Battleship North Carolina page."
Torpedoes Headed for Formation (a few steps from this marker); Battle Ribbons and Kill Board (a few steps from this marker); Enemies No More (within shouting distance of this marker); Captain’s Sea Cabin (within shouting distance of this marker); Friendly Fire (within shouting distance of this marker). Touch for a list and map of all markers in Wilmington.
 
Also see . . .  Oerlikon 20 mm cannon. Wikipedia entry (Submitted on April 19, 2025, by Larry Gertner of New York, New York.) 
 
20MM Anti-Aircraft Gun and informational sign image. Click for full size.
Photographed by Jeff Leichsenring, June 14, 2025
4. 20MM Anti-Aircraft Gun and informational sign
USS North Carolina (BB-55), 1941-1961. image. Click for more information.
via Naval History and Heritage Command, 1944
5. USS North Carolina (BB-55), 1941-1961.
Naval History and Heritage Command website entry
Click for more information.
 
 
Credits. This page was last revised on August 11, 2025. It was originally submitted on April 14, 2025, by Brandon D Cross of Flagler Beach, Florida. This page has been viewed 299 times since then and 34 times this year. Photos:   1, 2. submitted on April 14, 2025, by Brandon D Cross of Flagler Beach, Florida.   3. submitted on April 19, 2025, by Larry Gertner of New York, New York.   4. submitted on June 20, 2025, by Jeff Leichsenring of Garland, Texas.   5. submitted on June 27, 2025, by Larry Gertner of New York, New York. • Andrew Ruppenstein was the editor who published this page.
 
Editor’s want-list for this marker. Photo of a 20mm mount to replace borrowed image. • Can you help?
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Jul. 16, 2026