Fort Pierce in St. Lucie County, Florida — The American South (South Atlantic)
The Button
National Navy UDT-SEAL Museum
Photographed by Brandon D Cross, November 13, 2021
1. The Button Marker
Unlike SEAL Delivery Vehicles (SDV), the Button is a dry submersible which allows SEALs to travel in relative comfort for much longer periods of time to complete their mission. The Button reverses the usual layout of an SDV with the crew in the back, passengers in the middle, and lock-out chamber in the bow. The lock-out chamber allows divers to exit the submarine underwater using hatches located top and bottom of the chamber. The Button is 31 feet in length, with the beam and height of 6.3 feet. It has an operating depth of 110 meters, and is powered by batteries. The Button can travel for 60 nautical miles at five knots.
Illustration:
UOES3 General Arrangement
Approximate Description
Length: 9.7 M. Beam: 1.9m, Height: 1.9M
Weight: 17,700 Kg
Erected by National Navy UDT-SEAL Museum.
Topics. This historical marker is listed in these topic lists: Military • Roads & Vehicles • Waterways & Vessels.
Location. 27° 29.741′ N, 80° 18.04′ W. Marker is in Fort Pierce, Florida, in St. Lucie County. It can be reached from Florida Route A1A 0.3 miles south of Jackson Way, on the right when traveling north. Located within the National Navy UDT-SEAL
this page online
Regionally, this marker is on Florida’s Treasure Coast. It is also in the American South. Globally, it is in the North Atlantic Region, North America, a Gulf of Mexico state, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once New Spain, the territory of the Mississippian Culture, 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: America's Price of Freedom (here, next to this marker); Combatant Craft Assault (CCA) (within shouting distance of this marker); SOC-6 Special Operations Craft-6 (within shouting distance of this marker); Mk V Special Operations Craft [SOC] (within shouting distance of this marker); SOC-R Special Operations Craft-Riverine (within shouting distance of this marker); Frog Feet (within shouting distance of this marker); O Course (within shouting distance of this marker); Medal of Honor Statue (within shouting distance of this marker). Touch for a list and map of all markers in Fort Pierce.
Also see . . . Navy SEAL Museum receives Button 5.60 dry combat submersible. (Submitted on November 20, 2021, by Brandon D Cross of Flagler Beach, Florida.)
Photographed by Brandon D Cross, November 13, 2021
2. The Button Marker
Photographed by Brandon D Cross, November 13, 2021
3. The Button Bow section
Photographed by Brandon D Cross, November 13, 2021
4. The Button stern section
Photographed by James Hulse, January 7, 2026
5. The Button Marker
The interior view of the submarine with lights.
Photographed by James Hulse, January 7, 2026
6. The Button Marker
The view of the submarine next to the America's Price of Freedom artwork.
Credits. This page was last revised on February 1, 2026. It was originally submitted on November 20, 2021, by Brandon D Cross of Flagler Beach, Florida. This page has been viewed 321 times since then and 34 times this year. Photos: 1, 2, 3, 4. submitted on November 20, 2021, by Brandon D Cross of Flagler Beach, Florida. 5, 6. submitted on February 1, 2026, by James Hulse of Medina, Texas. • Devry Becker Jones was the editor who published this page.
