In grid fire, what is the maximum number of digits the Fire Direction Center can accept for the mission?

In grid fire, what is the maximum number of digits the Fire Direction Center can accept for the mission?

• A. Ten digits
• B. Six digits
• C. Eight digits
• D. Four digits

Answer: (A)

In grid fire, locations are given as a grid reference where the digits specify easting and northing within a 100,000-meter square. The number of digits turns into precision: 4 digits gives about 1,000-meter precision, 6 digits about 100 meters, 8 digits about 10 meters, and 10 digits about 1 meter. The Fire Direction Center can accept up to ten digits for a mission because that provides the highest practical precision, with five digits for easting and five for northing, yielding 1-meter accuracy within the grid square. Beyond ten digits isn't used in standard practice, so ten digits is the maximum the system accepts.

In grid fire, locations are given as a grid reference where the digits specify easting and northing within a 100,000-meter square. The number of digits turns into precision: 4 digits gives about 1,000-meter precision, 6 digits about 100 meters, 8 digits about 10 meters, and 10 digits about 1 meter. The Fire Direction Center can accept up to ten digits for a mission because that provides the highest practical precision, with five digits for easting and five for northing, yielding 1-meter accuracy within the grid square. Beyond ten digits isn't used in standard practice, so ten digits is the maximum the system accepts.