Islamorada in Monroe County, Florida — The American South (South Atlantic)
Yellow Submarine
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Recompression Chamber
Photographed by James Hulse, January 10, 2026
1. Yellow Submarine / Recompression Chamber Marker
Yellow Submarine
Circa mid-1960s; Unknown Maker; Colorado, USA
One-man submarine used by a Colorado fire-rescue team and later for recreational purposes by a Key West dive shop. It has a WWII era motor; a battery box; air-driven; ballast tanks; manual controls fully articulated for pitch, roll and yaw. As a wet sub, this watercraft would have been piloted by a diver wearing scuba gear. It has successfully dived to 150 feet.
Recompression Chamber
Circa WWI; Julius Pintsch; Berlin, Germany
Portable one-man recompression chamber used to treat the bends, or decompression sickness, caused by the formation of nitrogen bubbles in a diver's bloodstream and tissues as a result of ascending too quickly from great depths.
The affected diver is placed inside, and the chamber is pressurized to reduce the size of the gas bubbles, allowing them to be reabsorbed into body tissues. Pure oxygen is added to speed up the release of nitrogen. The pressure of the chamber is then slowly reduced to match surface pressure, allowing the nitrogen to gradually and safely escape from the diver's body.
Topics. This historical marker is listed in this topic list: Waterways & Vessels.
Location. 24° 55.869′ N, 80° 37.232′
this page online
Regionally, this marker is on the Florida Keys. It is also in the American South and on the Gulf Coast. 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: British Cannon circa 1600's (a few steps from this marker); Site of Islamorada Railway Station (approx. Ό mile away); Lights of the Florida Keys (approx. half a mile away); Indian Key (approx. half a mile away); Industry in the Florida Keys (approx. half a mile away); The Spanish Treasure Fleets (approx. half a mile away); Early Trade in the Florida Keys (approx. half a mile away); The Early Settlers of Upper Matecumbe Key (approx. half a mile away). Touch for a list and map of all markers in Islamorada.
Photographed by James Hulse, January 10, 2026
2. Yellow Submarine / Recompression Chamber Marker
The view of the marker and Recompression Chamber in front of the Diving Museum.
Photographed by James Hulse, January 10, 2026
3. Closeup of the Recompression Chamber
Credits. This page was last revised on February 6, 2026. It was originally submitted on February 5, 2026, by James Hulse of Medina, Texas. This page has been viewed 60 times since then. Photos: 1, 2, 3. submitted on February 6, 2026, by James Hulse of Medina, Texas.
Editor’s want-list for this marker. A photo of the Yellow Submarine on the roof of the Diving Museum building. • Can you help?
