Duncan, I'm working on the Battleship NJ. Yeah after doing through the manual some more with my work laptop and a full version of Adobe, I found that you really need to have certain parts of the manual available side-by-side, as the board silkscreen only shows test points, and even then, half of them are UNDER the parts, so you'll see "TP 2"... and find out it was TP21. The other reason for needing the diagrams is the chip numbers are not labeled on the boards - you need the diagram from the manual to show what's what.
I printed all the various board diagrams and read the operations description of the bandpass filter, so I have a better understanding of what it's doing. I do think its really just adjustments, although it's still a little weird in how they describe it. For example, the manual reads "adjust xyz for minimum AC using oscilloscope", yet the scope shows a digital/square wave on that test point, sooo not sure what to do there.
I also looked up the spare CRT I have (3BP1) and found out (Despite what one would think) that the 3BP1 CRT has a different pinout from a 2BP1, so no bueno for testing there. I had to set it aside for a few days to take care of some things around the house, but may play with it later tonight or next week.
Jeff KC3GJX