Nav chart question

[fongster]

When a chart says, "PA" (position approximate) for a rock, how close are they--off a lot, a little, yards, 1/4 mile...?

[Yutaka]

I just looked thru my Chapmans, but no qualitative definintion of PA. But if I remember my classes correctly, it means there is not enough independently verified data to chart the exact location. However, there is enough observations to verify the existence of said structure/hazrd/obstruction in the area.

Also worth noting is the less frequently seen PD (Position Doubtful) and ED (Existence Doubtful), meaning the reported observation could not be subsequently verified.

Yutaka

[fongster]

Thanks, YS. I have seen "PD" too but never thought it meant what you said.

On another note, I just completed a new floor board for the bait tank--it's plumbed underneath with the hose coming up the keel so there is nothing to trip over now. I also added some silica sand to the paint so it's non-slip. Feels nice to have a large flat area to fish from now.*

*relative to the boat's size, lol.