I love pirates, I love this. The captain's frustration is nearly tangible. That made my day.
Fourth line doesn't quite work, mind, the rest is good.
The 'I must find that red X' just made me snort, for some reason. And the title. The title is brilliant. Oh, pirates? ARRR! Not ARRGH! ARRR! *Tuts at you*
And... Oh yeah... Last line second stanza... Er... What? I don't quite understand... 'the highest level; eagerly?' It just evades me, sorry.
But yeah, bloody funny poem, and apart from my little nitpicks, very well done.