[LukeFF]

Originally Posted by elanaiba

I think you're confusing a recommended field mod with something that is generally available on all boats. Is there another example than the Cobia?

• From the same HNSA page (http://www.hnsa.org/doc/radar/part4.htm#pgSJ-3) there is a diagram of the same range indicator unit ("Figure 4 SJ-5. Range unit").

• USS Cod shows a range indicator unit for the SJ: http://www.usscod.org/graphics/CT-Sonar.jpg

• Pampanito has a range indicator: http://img.photobucket.com/albums/v2...JPampanito.jpg

• USS Croaker has one: http://glnmm.org/DSC00245.JPG

• USS Bowfin has one: http://img.photobucket.com/albums/v2...F/SJBowfin.jpg

• USS Ling has one: http://www.navsource.org/archives/08/0829716.jpg (hard to tell in that picture, but it's there)

Those are the ones I could find right now. I'm sure there's more pics at Navsource.