Results for grid

How precisely does a four-, six-, eight-, and ten-digit grid coordinate locate a point?

Four digits locate a point to within 1,000 meters, six digits to within 100 meters, eight digits to within 10 meters, and ten digits to within 1 meter.

What are the three parts of a complete military grid reference system coordinate?

The grid zone designation, the 100,000-meter square identifier, and the numerical grid coordinate read to the required precision.

What is the rule for reading a grid coordinate?

Read right and up. Read the easting first, left to right along the bottom, then the northing, bottom to top. The digits are always split evenly between the two.

Map Reading and Land Navigation

TC 3-25.26 is the Army's map reading and land navigation manual: grids, marginal information, terrain features, azimuths, and navigation techniques. Dated November 2013, it is still the active reference used on land navigation courses and at boards. Note the designator -- it is a TC, not an FM or ATP.

What are the three norths shown on a military map?

True north, magnetic north, and grid north. They appear together in the declination diagram in the map margin. True north is shown by a star, grid north by the letters GN, and magnetic north by a half arrow.

What is the G-M angle?

The grid-magnetic angle: the angular difference between grid north and magnetic north for that map sheet. It is shown in the declination diagram along with the conversion instructions used to change a magnetic azimuth to a grid azimuth or the reverse. Always use the conversion notes printed on the sheet you are working from.