Unit Reference Sea Power
Its a catalog of all the units available in Sea Power, specs, weapons, all the info you need.
You can easily bring up unit reference by RMB clicking an unit in Tactical Display and choosing "Unit Reference", then you get to see it just like in the below example image.
The carets to right ">" are directories for these unit categories or types whatever term fits the best, for example if you click the caret for Aircrafts then it opens a new directory to view further details on aircraft category.
On the above example image we see United States Navy Belknap-class Missile Cruiser. In "Weapons:", "Sensors:" and "Defences:" sections you can click those various items and get further details brough up about them, for example "what is this SM-2ER huh!?", no problem, just click the "SM-2ER" and it will bring details dialog with plenty of information about this specific weapon.
Below example image is from United States Navy MK-46 Torpedo.
For this MK-46 torpedo you get to see all kinds of specifications; type, primary/secondary engagement modes, guidance type, mid course correction(?), max velocity (speed), range, attack altitude (obviously for torpedo its zero), warhead type and warhead size. Good stuff, now start memorizing all these specs like the naval warfare fleet tactics enthusiast you claim to be ;)
Know your tools, capabilities, weapons, sensors, friends and enemies, that is how you win a naval combat scenarios :)