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Check Out This Vintage Mystery Navigation Screen In The Conn Of A Sturgeon Class Nuke Sub

Check Out This Vintage Mystery Navigation Screen In The Conn Of A Sturgeon Class Nuke Sub

When it comes to military hardware, especially of the sensitive underwater kind, once in a while a photo will pop up that shows something that you never knew existed. That was the case yesterday when Eric Moreno, founder of the popular Reddit page r/submarines, posted a picture on his Twitter account showing what appears to be a CRT navigational director display mounted in front of a conn position on the Sturgeon class nuclear fast attack submarine USS Queenfish (SSN-561). Supposedly, the photo was taken during an ICEX mission in 1970.

After seeing the photo, I asked a few of my submariner sources about it, thinking it is probably a known system that was tested or even deployed for a period of time before. That was not the response I got, none of them had ever heard of it before.

The system looks remarkably similar to the navigational display found in Grumman A-6 Intruders from the same era. That display, which was absolutely cutting-edge at the time, tied directly to the A-6’s Digital Integrated Attack Navigation Equipment (DIANE) computer system that allowed A-6 crews to make precision bombing runs during the night and in horrible weather and to navigate to and strike their targets at low-level with the aid of terrain following radar.

DIANE and other sensors and systems on the Intruder were tired to the screen, called the Vertical Display Indicator, which acted as a primary flight instrument of the pilot. The screen worked in a similar manner as modern electronic flight instrumentation systems (EFIS) with synthetic vision, but in a far cruder and self-contained manner. It could show the horizon, sky, terrain, as well as the aircraft’s altitude, angle of attack, vertical speed, and heading. A flight director was overlaid for navigation and precision bombing at night and in bad weather guided by DIANE. The display looked positively sci-fi for its time and the likeness to what we see on the CRT monitor mounted on the conn of Queenfish is very intriguing.

Vertical Display Indicator screens on different modes in the Intruder.

It doesn’t take all that much creativity to realize that such a system may have looked very appealing to submariners navigating the depths with no view of the outside world. In fact, maybe the Navy ported over some of the same technology from the A-6 and tied it into the submarine’s complex inertial navigation system (INS), sonar, and other sensors.

The conn section from <em>USS Sturgeon</em> on display at the National Submarine Museum in Groton, Connecticut (The central monitor was added as part of the interactive display)

Whatever the story was behind this display, which looks like it belongs in an X-Wing more than a submarine from the 1960s, it had to have been leading class technology at the time. In fact, it was probably so advanced that it wasn’t even effective as we didn’t see digital conn instruments on American submarines until decades later.

Even the <a href=Los Angeles class boats that followed the Sturgeon class had analog conn instrumentation. " />

It wasn’t until the Seawolf class of the 1990s that digital conn instruments would be standard class-wide. Today, the Virginia class that is currently in production has a conn that looks more like it’s installed in a starship than in a submarine.

The conn aborad <em>USS Jimmy Carter</em>, the <a href=modified Seawolf class submarine that serves as America’s primary spy and espionage sub." />

Diverging greatly from any past design, the Virginia class jettisons the classic yoke control wheel and the vertical wall of instruments that were staples of past submarine conn stations for a pair of joysticks and a partial cocoon of angled flat panel displays. Another great photo of what this layout looks like can be seen by clicking here.

The futuristic conn aboard <em>USS New Mexico </em>(SSN-779).

Clearly, this navigation screen mounted in USS Queenfish’s conn was way ahead of its time. Eventually the ability to process and display a slew of positioning and navigational data for sailors driving multi-billion dollar nuclear submarines would become a reality, but considering that the picture in question was supposedly shot nearly 50 years ago, it would be great to know more about just how ambitious the system shown actually was and where it came from in the first place.

If anything else, the photo is another stark reminder that America’s murky undersea warfare history still has plenty of secrets to give up.

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December 7, 2018 at 02:54AM


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