DEPOT knowledge

I've seen Panzer's post, and didn't specifically answer some questions I had:

How much should we know before hand regarding: Flags/Pennants/ Knots and Line parts as well as firefighting basics.

Its on the RT Pocket guide (which is slightly outdated with GO 6 and 9, as well as the ethos)

Also, regarding rank description: Can anyone with recent experience confirm descriptions. I think I understand Enlisted and Officer descriptions (E4 for ex would be one gold chevron beneath a silver shield), but have no idea how I would describe WO's. As well as sleeve bands for Officers. I currently created my own description as small/ medium/ large gold band. For example, O4 Lt Commander would be two medium gold bands and one small gold band. Anyone have any experience with this? Thanks