USS Muskallunge (SS-262)
USS Muskallunge (SS-262) in 1944 at the Mare Island Naval Shipyard, California. Image courtesy of the National Archives.
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Background
USS Muskallunge (SS-262) was an American-built Gato-class submarine that served in the U.S. Navy between 1943 and 1957 before it was transferred to the Brazilian Navy, where it was renamed Humaitá (S14) and served between 1957 and 1968. Muskallunge was built at the Electric Boat Company in Groton, Connecticut. Construction began on April 7, 1942, and it was commissioned on March 15, 1943.
Muskallunge had an overall length of 95.02 meters, a beam of 8.31 meters, a draft of 5.18 meters, a test depth of 90 meters, and a displacement of 1,525 tons surfaced and 2,424 tons submerged. It was equipped with 10 21-inch torpedo tubes, 6 forward and 4 aft, and could carry 24 torpedoes. It also had one 3-inch deck gun and a Bofors 40-millimeter cannon.
Muskallunge had an overall length of 95.02 meters, a beam of 8.31 meters, a draft of 5.18 meters, a test depth of 90 meters, and a displacement of 1,525 tons surfaced and 2,424 tons submerged. It was equipped with 10 21-inch torpedo tubes, 6 forward and 4 aft, and could carry 24 torpedoes. It also had one 3-inch deck gun and a Bofors 40-millimeter cannon.
The remains of USS Muskallunge (SS-262) on the seafloor off Long Island, New York. Image courtesy of NOAA Ocean Exploration, 2021 ROV Shakedown.
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Exploration
NOAA Ocean Exploration explored Muskallunge on June 26, 2021, during a shakedown expedition aboard NOAA Ship Okeanos Explorer. Remotely operated vehicle (ROV) Deep Discoverer — equipped with an Insite Pacific Pacific Zeus Plus camera capable of collecting high-definition footage — was used to document the site, which is at a depth of approximately 635 meters and broken into two large sections: the bow section, which is approximately 60 meters long, and the stern section, which is approximately 30 meters long.
Modeling
This model of Muskallunge is based on the ROV dive footage from timestamps 14:45 to 16:35 for the bow section and 17:45 to 19:00 for the stern section. This footage was exported into 9,169 images using VLC Player. The footage collected during exploration of Muskallunge was not intended for photogrammetry. So, to address alignment issues, individual models were made for the starboard and port sides of the stern section and then stitched together in Rhinoceros 8 and uploaded to Construkted Reality.
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Related Links
Site Metadata
| Site | Data |
|---|---|
| Site Name | USS Muskallunge (SS-262) |
| Type | UCH |
| UCH Vessel Date Built | December 13, 1942 |
| UCH Vessel Date Sank | July 9, 1968 |
| Hull Material | Steel |
| Official Number | SS-262/S14 |
| Location | Mid-Atlantic Canyons |
| Depth | 635 meters |
| Length | Bow section approximately 60 meters; stern section approximately 30 meters |
| Width | 8.31 meters |
Dive Metadata
| Dive | Data |
|---|---|
| Expedition Number | EX2103 |
| Expedition Name | 2021 ROV Shakedown |
| ROV Dive Number | 11 |
| ROV Dive Date | June 26, 2021 |
| ROV Used | Deep Discoverer |
| Camera Information | Insite Pacific Zeus Plus HD, 3-CCD color camera with 2/3-inch 2,200,000 pixel 1080i IT CCDs |
| Video or Stills | Video |
Model Metadata
| Model | Data |
|---|---|
| Software | Agisoft Metashape Standard Version 2.0.1, Rhinoceros 8 |
| Number of Images Used/Format | 9,169/JPG |
| Image Alignment Percentage | 99% |
| Number of Tie Points | 1,695,729 |
| Time to Complete | 8 hours |
| Orthomosaic Views Available | No |
| Images Available | Yes |
| Animations Available | Yes |
| Available File Exports/Location/POC | archaeology.oceanexploration@noaa.gov |