Rudder Post Inspection w/ pics

[Freerider]

I've had my boat hauled to my farm to do some work and after being out of the water I've noticed what looks like rust streaks running down my rudder, I've heard of this before but I'm not sure what to make of it.

Is this a sign of a serious problem must be addressed before next launch, or just something to keep an eye on that will eventually need to be looked after?

I've never inspected a rudder post before, how big of a job is this?

(pics are from a blackberry, bad quality)

[zz4gta]

If that's rust, then I'd pull it out and inspect it. It'll be different on almost every boat, mine is only 2 bolts and the whole thing falls right off.