USS S-19 (SS-124) was an American-built S-class submarine that served in the U.S. Navy between 1921 and 1934. S-19 was built at the Electric Boat Company in Groton, Connecticut. It was commissioned on August 24, 1921. 

SS-19 had an overall length of 66.83 meters, a beam of 6.3 meters, a draft of 4.85 meters, a test depth of 61 meters, and a displacement of 854 tons surfaced and 1,062 tons submerged. It was equipped with four 21-inch (533 millimeter) torpedo tubes at the bow and one 4-inch deck gun.

S-19 served on patrol along the northeastern seaboard of the United States from 1923 to 1930, taking part in fleet exercises in Panama each year. In 1930, it was reassigned to Pearl Harbor, Hawai‘i, and operated in the Pacific for the next three years. On December 12, 1936, S-19 was stricken from the naval record. Two years later, on December 18, 1938, it was towed out to sea and scuttled off the coast of Hawai‘i. 

S-19 was rediscovered and explored on September 3, 2015, during an expedition led by NOAA Ocean Exploration aboard NOAA Ship Okeanos Explorer. Remotely operated vehicle (ROV) Deep Discoverer — equipped with an Insight Pacific Zeus Plus camera capable of collecting high-definition footage — was used to document the site, which is at a depth of approximately 414 meters and is approximately 66.83 meters long and approximately 6.3 meters wide.

The footage used for the three photogrammetric models of the SS-19 site was from timestamps 19:50 to 22:05. This footage was processed into still images using Photoshop and was color corrected. 3,131 images were used for the three photo models of the site (the port bow, port midship, and starboard sections). The footage collected during exploration of SS-19 was not intended for photogrammetry. While aligning the models, there was some distortion at the bow that caused the port side to misalign. To address this, the port side was broken into two models, while the starboard side was modeled entirely.

The full annotated video of this dive can be viewed on SeaTube.

Site Name: USS S-19

Type: UCH

UCH Vessel Date Built: June 21, 1920

UCH Vessel Date Sank: December 18, 1938

Hull Material: Steel

Official Number: SS-124

Expedition Number: EX1504L3

Expedition Name: 2015 Hohonu Moana (Leg 3)

ROV Dive Number: 07

ROV Dive Date: September 3, 2015

Location: Hawai‘i

Depth: 414 meters

Length: 66.83 meters

Width: 6.3 meters

ROV Used: Deep Discoverer

Camera Information: Insight Zeus Plus HD, 3-CCD color camera with 2/3-inch 2,200,000 pixel 1080i IT CCDs

Video or Stills: Video

Number of Images Used/Format: 3,131/JPG

Image Alignment Percentage: 91%

Number of Tie Points: 648,417

Link to Raw Video Footage:

Time to Complete: 5 hours

Orthomosaic Views Available: No

Images Available: Yes

Animations Available: Yes

Available File Exports/Location/POC:

Link to NOAA Ocean Exploration Project Page:

Software: Agisoft Metashape Standard Version 2.0.1.

Developer: Raymond Phipps, NOAA Ocean Exploration explorer-in-training, August 1, 2023.

Credit: Model courtesy of NOAA Ocean Exploration, 2015 Hohonu Moana.