Museum Exhibit Commemorating Historic NR-1 Submarine Opens in Groton

A deep diving submarine that was once one of the most secretive vessels in the U.S. fleet is now part of a permanent installation at the Connecticut Submarine Force Museum.

Rep. Joe Courtney and Chief of Naval Operations Jonathan Greenert attended Wednesday’s ribbon cutting ceremony for the NR-1 submarine exhibit in Groton.

The NR-1 entered service in 1969 and served for nearly 40 years in its primary function as a research vessel. Many of its missions involved retrieving objects -- such as debris from the space shuttle Challenger explosion -- from the sea floor with its external robotic arm.

In the mid 1990's, the NR-1 was used to explore the wreck of the HMHS Britannic -- one of three passenger ships nearly identical in design to the famous RMS Titanic.

Though it was never equipped with weapons, the NR-1 conducted several military operations. However, despite its decommissioning in 2008, the vast majority of the NR-1’s missions remain classified to this day.

Greenert called the NR-1 a "technical marvel" and said that it made exploration of the sea floor possible.

“NR-1 was a unique part of the history of our submarine force and our nation, and its display next to another submarine icon – the USS Nautilus – is a fitting tribute to the service and legacy of this vessel and all those who served on her,” said Rep. Courtney.

The newly unveiled installation features several parts of the NR-1 including its sail, rudder, periscope tower, propellers, and mechanical arm.

This report includes information from The Associated Press.