The Expedition 4 has a large baseplate to improve handling on maps and charts in the field. A full-sized baseplate not only makes it easier to hold you compass steady on a map, it's also easier to plot a bearing and take measurements.
The magnifier aids attention to fine detail and there are Romer scales at 1:63.360 1:50.000 1:25.000.
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On behalf of Parque Nacional Nahuel Huapi I would like to thank NHBS. The book will be very useful for my students.
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