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

Submarine Rocket (SUBROC)

Photographed by Darren Jefferson Clay, November 26, 2025

1. Submarine Rocket (SUBROC) Marker

Inscription. SUBROC was designed for long-range underwater attack by one submarine against another submarine. Once ejected from the torpedo tube, the rocket ignites and propels the missile at supersonic speed to its target. A nuclear or conventional warhead is then dropped for undersea detonation. Accurate timing and target calculations were crucial.

SUBROC was in service from 1965 to 1987.

Weight 4,000 pounds
Length: 21 feet
Diameter: 21 inches
Range: 35 miles

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

Location. 21° 22.133′ N, 157° 56.307′ 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,

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the Western World,

and the Anglosphere.

Other nearby markers. At least 8 other markers are within walking distance of this marker: Mark 45 Nuclear Capable Torpedo (here, next to this marker); Top Secret Kaiten: Suicide Weapon (a few steps from this marker); Mark 37 Electric Torpedo (a few steps from this marker); Multiple All Up Round Canister (MAC) (a few steps from this marker); Inside a Kaiten (a few steps from this marker); Mark 27 Torpedo (a few steps from this marker); A Desperate Measure (a few steps from this marker); USS Parche (a few steps from this marker). Touch for a list and map of all markers in Honolulu.

Other markers no longer nearby. Kaiten (was here, next to this marker but has been replaced with another marker now near it); 40 MM Quad Gun Assembly (was a few steps from this marker but has been permanently removed).

Photographed by Darren Jefferson Clay, November 26, 2025

2. Submarine Rocket (SUBROC) Marker

Credits. This page was last revised on January 27, 2026. It was originally submitted on January 23, 2026, by Darren Jefferson Clay of Duluth, Georgia. This page has been viewed 25 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.