Honolulu in Honolulu County, Hawaii — Hawaiian Island Archipelago (Pacific Ocean)

Harpoon Capsule

Photographed by Darren Jefferson Clay, November 26, 2025

1. Harpoon Capsule Marker

Inscription. This capsule enables submerged launch of the Harpoon missile through a submarine's torpedo tube. When the capsule breaks the surface, the front and end caps eject so the missile can blast out.

Weight: 1,385 pounds
Length: 15 feet
Diameter: 13 inches
Range: 69 miles
Speed: High subsonic 530 miles per hour

Topics. This historical marker is listed in these topic lists: Air & Space • Military • Waterways & Vessels.

Location. 21° 22.14′ N, 157° 56.332′ W. Marker is in Honolulu, Hawaii, in Honolulu County. It can be reached from Arizona Memorial Road, on the left when traveling north. Touch for map. Marker is at or near this postal address: 11 Arizona Memorial Road, Aiea HI 96701, United States of America. Touch for directions.

Regionally, this marker is on Hawaii’s Pearl Harbor and Historic West Oahu.

Globally, it is in North America,

Polynesia,

the Pacific Ocean,

North Pacific,

the Pacific Rim,

the Western Hemisphere,

the Western World,

and the Anglosphere.

Other nearby markers. At least 8 other markers are within walking distance of this

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marker: Tomahawk Land Attack Missile (TLAM) (here, next to this marker); 3"/50 Deck Gun (here, next to this marker); Submarine Propeller USS Darter (SS-576) (a few steps from this marker); Battle Stations Surface! 31 July 1944 (a few steps from this marker); Mark 14: Early Failures (a few steps from this marker); Harpoon Missile (a few steps from this marker); Bofors 40MM Quad Gun (a few steps from this marker); Mark 14 Torpedo (a few steps from this marker). Touch for a list and map of all markers in Honolulu.

Harpoon Capsule and Marker image. Click for full size.

Photographed by Darren Jefferson Clay, November 26, 2025

2. Harpoon Capsule and Marker

Credits. This page was last revised on January 26, 2026. It was originally submitted on January 23, 2026, by Darren Jefferson Clay of Duluth, Georgia. This page has been viewed 51 times since then. Photos: 1, 2. submitted on January 23, 2026, by Darren Jefferson Clay of Duluth, Georgia. • Andrew Ruppenstein was the editor who published this page.