Originally Posted by njkayaker

You are exaggerating the amount of distance lost. There shouldn't be much difference (so, the number should be fairly close to what is expected).


If there's a large difference, the thing you talked about isn't likely to be the cause. If so, talking about it wouldn't be relevant to the OP. The "reason for the most error" would be (which is why people need to "give it").

(We still have no idea what the "real" distance is.)