Event blockades are generally non-sinking, so this is a safe way to practise your PvP and we are fortunate to own Zuyua & can set up events easily.
With non-sinking, the ONLY cost is your stock & jobber pay; you have no pillage booty or goods you can lose, and your bnav stat will not go down
I think all officers should enter these when you get a chance, try out different moves & tricks, so when you are attacked in a PvP battle while pillaging you are more skilled.
These events are also a great way for bnavers to increase skills and for our cade nav team to offer you tips
Please see me ingame if you want me to organise an event cade to suit your day/time