I understand that there are a lot of factors that add to the error of a bearing and therefore the accuracy of a triangulation but I would like to know in general how accurate it is possible to be.
To make this question more concrete I have this case as my question. I sighted a stadium I can see from my house and found its bearing adjusting for declination using a lensatic compass with a sight. I then drew the line from that bearing on my map with a map compass which facilitated an accurate transfer of the reading. I did the same with another building that I saw.
Where the lines intersected was about 400 meters away from where I actually was according to the map legend. These buildings were each less than 2 miles away from me as the crow flies. It seems the error would be very small at this range.
Is this a normal amount of error for a handheld lensatic compass or can I expect better results?