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Off topic for a moment, but is declination *really* needed? Most of the topo maps I've seen have a Mag North and a True North imprinted. I just tend to use the Mag north as my reference and ignore declination. I get a yardstick, continue the MN arrow until is hits the end of the map, and draw parallel lines from there. That way my compass can be placed on those lines, orient the map, and away I go.

MDiana,

Do NOT use this unless you have checked the angle with current. The USGS specifically states that the arrows are NOT drawn to match the declination. There can be significant error this way. If you want to use this technique then use a protractor or baseplate compass to draw the angle from a True North line on the map.

All,

I have used a Brunton Pocket Transit for about 45 years and use it for everything but orienteering. A baseplate is designed for that. It (like the lensatic) is not ideal for lots of things and overkill for most, but I regularly use all the features and at work need the accuracy so I use it even when other types would be better.

The best,

JerryF