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Applied Ballistics Glossary of Terms Used on Garmin Devices

The glossary below applies to Garmin devices using Applied Ballistics. For more information, see the Applied Ballistics Glossary of Terms in your owner's manual

  • Aerodynamic Jump Effect - the amount of elevation solution attributed to aerodynamic jump. An aerodynamic jump is the vertical deflection of the bullet due to a crosswind. Aerodynamic jumps are calculated based on the Wind Speed 1 value.

  • Ambient/Station Pressure - the ambient (station) pressure. Ambient pressure is not adjusted to represent sea level (barometric) pressure. Ambient pressure is required for the ballistics shooting solution.

  • Ballistic Coefficient - the manufacturer's ballistic coefficient for your bullet.

  • Bullet Diameter - the bullet diameter measured in inches.

  • Bullet Drop - the total drop the bullet experiences along its flight path, displayed in inches.

  • Bullet Length - the length of the bullet measured in inches.

  • Bullet Weight - the bullet weight measured in grains.

  • Cosine Inclination Angle - the cosine of the inclination angle to the target.

  • Direction of Fire (DOF) - the direction of fire with North at 0 degrees and East at 90 degrees.

  • Drag Curve - the Applied Ballistics custom drag curve, or the G1 or G7 standard projectile models.

  • Elevation - the vertical portion of the aiming solution displayed in milliradians (mil) or minute of angle (MOA).

  • Horizontal Coriolis Effect - the amount of the windage solution attributed to the Coriolis effect. This is always calculated by the device, although the impact may be minimal if you are not shooting at extended range.

  • Humidity - the percentage of moisture in the air.

  • Inclination - the angle of inclination of the shot. A negative value indicates a downhill shot. A positive value indicates an uphill shot. The shooting solution multiplies the vertical portion of the solution by the cosine of the inclination angle to calculate the adjusted solution for an uphill or downhill shot.

  • Latitude - the horizontal location on the Earth's surface. Negative values are below the equator. Positive values are above the equator. This value is used to calculate the vertical and horizontal Coriolis drift.

  • Lead - the horizontal correction needed to hit a target moving left or right at a given speed.

  • Max Ordinance - the maximum ordinance is the maximum height above the axis of the barrel that a bullet will reach along its flight path.

  • Max Ordinance Range - the range at which the bullet will reach its maximum ordinance.

  • Muzzle Velocity - the speed of the bullet as it leaves the muzzle.

  • Output Units - the output units of measure. A milliradian (mil) is 3.438 inches at 100 yards. A minute of angle (MOA) is 1.047 inches at 100 yards.

  • Range (RNG) - the distance to target display in yards or meters.

  • Remaining Energy - the remaining energy of the bullet at target impact displayed in foot-pounds of force (ft. lbf) or Joules (J).

  • Speed - the speed of a moving target displayed in miles per hour (mph) or kilometers per hour (km/h). A negative valued indicates a target moving left. A positive value indicates a target moving right.

  • Sight Height - the distance from the center axis of the rifle barrel to the center axis of the scope.

  • Sight Scale Factor (SSF) Elevation - a linear multiplier that accounts for vertical scaling. Not all rifle scopes track perfectly, so the ballistics solution requires a correction to scale according to a particular rifle scope. For example, if a turret is moved 10 mil but the impact is 9 mil, the sight scale is 0.9.

  • Sight Scale Factor (SSF) Windage - a linear multiplier that accounts for horizontal scaling. Not all rifle scopes track perfectly, so the ballistics solution requires a correction to scale according to a particular rifle scope. For example, if a turret is moved 10 mil but the impact is 9 mil, the sight scale 0.9.

  • Spin Drift - the amount of windage solution attributed to the spin drift (gyroscopic drift). For example, in the northern hemisphere a bullet shot out of a right-hand twist barrel will always deflect slightly to the right as it travels.

  • Temperature - the temperature at your current location.

  • Time of Flight - the time of flight which indicates the time required for a bullet to reach its target at a given range.

  • True Drop - the actual distance the bullet falls when fired at a specific range displayed in milliradians (mil) or minute of angle (MOA).

  • Twist Rate - the distance it takes for the rifling of your barrel to make one full rotation. Rifle twist is often provided by the gun or barrel manufacturer.

  • Velocity - the estimated velocity of the bullet when it impacts the target.

  • Velocity Mach - the estimated velocity of the bullet when it impacts the target displayed as a factor of Mach speed.

  • Vertical Coriolis Effect - the amount of elevation solution attributed to the Coriolis effect. This is always calculated by the device, although the impact may be minimal if you are not shooting at extended range.

  • Wind Direction - the direction from which the wind is coming. For example, a 9:00 wind blows from your left to right.

  • Windage 1 - the horizontal portion of the aiming solution based on the wind speed 1 and wind direction, displayed in milliradians (mil) or minute of angle (MOA).

  • Windage 2 - the horizontal portion of the aiming solution based on the wind speed 2 and wind direction, displayed in milliradians (mil) or minute of angle (MOA).

  • Wind Speed 1 - the wind speed used in the shooting solution.

  • Wind Speed 2 - an optional, additional wind speed used in the shooting solution.

  • Zero Height - an optional modification to impact elevation at zero range. This is often used when adding a suppressor or using a subsonic load. For example, if you add a suppressor and your bullet impacts the target 1 inch higher than expected, your Zero Height is 1 inch. You must set this to zero when you remove the suppressor.

  • Zero Offset - an optional modification to windage at zero range. This is often used when adding a suppressor or using a subsonic load. For example, if you add a suppressor and your bullet impacts the target 1 inch to the left of the expected impact, your Zero Offset is -1 inch. You must set this to zero when you remove the suppressor.

  • Zero Range - the range at which the rifle is zeroed.