## SIMULATION VARIABLE UNITS

This page lists the different units of measurement that can be used when accessing or setting the different simulation variables.

### Length

Units Description
meter, meters, m The meter is the base unit of length in the International System of Units (SI). 1m is equal to 3.28084 imperial feet.
meter scaler 256meters scaler 256 This is the same as the meter (above) only scaled by 1/256, ie: VALUE / 256.
millimeter, millimeters The millimeter is an SI unit of length, equal to one thousandth of a meter. 1mm is equal to 0.0393701 inches.
centimeter, centimeters, cm A centimeter is an SI unit of length, equal to one hundredth of a meter. 1cm is equal to 0.393701 imperial inches.
kilometer, kilometers, km The kilometer is an SI unit of length, equal to one thousand meters. 1km is equal to 0.621371 imperial miles.
nautical mile, nautical miles, nmile, nmiles A nautical mile is a unit of length used in air and marine navigation. The nautical mile is defined as exactly 1852 meters (6076 ft or 1.151 miles).
decinmile, decinmiles This is one tenth of a nautical mile, equivalent to 185.2 meters (607.61 ft).
inch, inches, in The inch is an imperial unit of length derived as 1/12th of a foot. It is equal to 25.4 mm.
foot, feet, ft The foot is an imperial unit of length, considered as 12 inches in length. It is equal to  0.3048 meters.
yard, yards The yard is an imperial unit of length that comprises 3 feet or 36 inches, and 1,760 yards is equal to 1 mile. It is equal to 0.9144 meters.
decimile, decimiles This is one tenth of an imperial mile, equivalent to 160.93 meters.
mile, miles The mile is an imperial unit of length, equivalent to 1,609.34 meters.

### Area

Units Description
square inch, square inches, sq in, in2

A square inch is an imperial unit of area, equal to the area of a square with sides of one inch. It is equal to 6.4516cm².

square feet, square foot, sq ft, ft2 A square foot is an imperial unit of area, equal to the area of a square with sides of one foot. It is equal to 929.03cm² or 144in².
square yard, square yards, sq yd, yd2 A square yard is an imperial unit of area, equal to the area of a square with sides of one yard. It is equal to 0.83612736m² or 9ft².
square mile, square miles A square mile is an imperial unit of area, equal to the area of a square with sides of one mile. It is equal to 2.58999km².
square millimeter, square millimeters, sq mm, mm2 A square millimeter is an SI unit of area, equal to the area of a square with sides of one millimeter. It is equal to 0.0393701in².
square centimeter, square centimeters, sq cm, cm2 A square centimeter is an SI unit of area, equal to the area of a square with sides of one centimeter. It is equal to 0.155in².
square meter, square meters, sq m, m2 A square meter is an SI unit of area, equal to the area of a square with sides of one meter. It is equal to 10.7639ft².
square kilometer, square kilometers, sq km, km2 A square kilometer is an SI unit of area, equal to the area of a square with sides of one kilometer. It is equal to 0.386102miles².

### Volume

Units Description
cubic inch, cubic inches, cu in, in3

A cubic inch is an imperial unit of area, equal to the area of a cube with sides of one inch. It is equal to 16.3871cm³.

cubic foot, cubic feet, cu ft, ft3 A cubic foot is an imperial unit of area, equal to the area of a cube with sides of one foot. It is equal to 28316.917cm³ or 1728.01in³.
cubic yard, cubic yards, cu yd, yd3 A cubic yard is an imperial unit of area, equal to the area of a cube with sides of one yard. It is equal to 0.764555m³ or 27ft³.
cubic mile, cubic miles A cubic mile is an imperial unit of area, equal to the area of a cube with sides of one mile. It is equal to 4.16818km³.
cubic millimeter, cubic millimeters, cu mm, mm3

A cubic millimeter is an SI unit of area, equal to the area of a cube with sides of one millimeter.

cubic centimeter, cubic centimeters, cu cm, cm3 A cubic centimeter is an SI unit of area, equal to the area of a cube with sides of one centimeter. It is equal to 0.0610237in³.
cubic meter, cubic meters, meter cubed, meters cubed, cu m, m3 A cubic meter is an SI unit of area, equal to the area of a cube with sides of one meter. It is equal to 35.3147ft³.
cubic kilometer, cubic kilometers, cu km, km3 A cubic kilometer is an SI unit of area, equal to the area of a cube with sides of one kilometer. It is equal to 0.239913miles³.
liter, liters The liter is an SI unit of volume based on the mass of one kilogram of liquid water. It is equal to 0.264172gallons.
gallon, gallons The gallon is an imperial unit of volume, defined as 231in³. It is equal to 3.785412 litres.
quart, quarts The quart is an imperial unit of volume defined as 1 quarter of a gallon, or 57.75in³. It is equal to 0.946353 litres.
fs7 oil quantity This is an imperial unit derived from quarts and gallons and only used when dealing with engine oil amounts. The formula used to derive the unit is: VALUE * ((8 / 32767) * (0.25 * (3.785411784 * 0.001)))

### Temperature

Units Description
kelvin

The kelvin is the base unit of temperature in the International System of Units (SI). The kelvin is the primary unit of temperature measurement for the physical sciences, but is often used in conjunction with the degree Celsius - which has the same magnitude - where 0 kelvin (called "Absolute Zero") corresponds to a temperature of -273.15°C. "Absolute Zero" is the equivalent -459.67°F.

rankine

The rankine is a base unit of temperature, similar to the kelvin as 0 rankine is the same as "Absolute Zero" kelvin. However the difference of 1 rankine is defined as equal to 1 Fahrenheit degree, rather than the Celsius degree used on the kelvin scale. A temperature of 0K is equal to 0R which is the equivalent of -273.15°C or -459.67°F.

farenheit, fahrenheit

The Fahrenheit scale is a temperature scale based on two fixed points: the temperature at which pure water ice melts (32°F) and the temperature at which water boils (212°F) both at sea level and under standard atmospheric pressure. 0°F is equal to 255.372K, 459.67R or -17.7778°C.

celsius

The Celsius scale is a temperature scale based on 0°C for the freezing point of water and 100 °C for the boiling point of water at 1 atmosphere of pressure. 0°C is equal to 273.15K, 491.67R or 32°F

celsius fs7 egt This the same as the celsius unit only scaled by the following formula: VALUE / (1.8 * (6144 / 2060)).
celsius fs7 oil temp This the same as the celsius unit only scaled by the following formula: (VALUE - 273.15) * (16384 / 140.0). It is only used when dealing with engine oil temperature.
celsius scaler 1/256 This unit is for degrees celsius scaled by 1/256, eg: VALUE / 256.
celsius scaler 256 This unit is for degrees celsius scaled by 256, eg: VALUE * 256.
celsius scaler 16k This unit is for degrees celsius scaled by 16K, eg: VALUE * 16384.0.

### Angles

Units Description
radian, radians The radian is the base unit of temperature in the International System of Units (SI). One radian is defined as the angle subtended from the center of a circle which intercepts an arc equal in length to the radius of the circle. 1 radian is equivalent to 57.296°.
round, rounds A round is defined as an angle of the full 360 degrees (ie: a circle).
degree, degrees, Degrees The degree (°) is a base unit of angle defined such that an entire rotation is 360 degrees. 1° is equal to 0.0174533 radians.
grad, grads The grad (or gradian) is a unit of measurement of an angle, defined as one hundredth of the right angle. 1 grad is equal to 90°, or 1.5708 radians.
angl16, degree angl16, degrees angl16 This represents a unit that is a radian cast as a 16bit integer using the following formula: round(VALUE) / 65536.0
angl32, degree angl32, degrees angl32 This represents a unit that is a radian cast as a 32bit integer using the following formula: round(VALUE) / (65536.0 * 65536.0)

### Global position

Units Description
degree latitude, degrees latitude A degree latitude is an angle used to measure the geographic position along the North-South axis of the Earth, over it's surface. Degrees latitude range from 0° at the Equator to +90° at the North pole or -90° at the South pole.
degree longitude, degrees longitude A degree longitude is an angle used to measure the geographic position along the East-West axis of the Earth, over it's surface. Degrees longitude range from 0° at the Prime Meridian to +180° Eastward and -180° Westward.
meter latitude, meters latitude A meter latitude is defined as the number of degrees travelled for a meter of circumferance of the Earth. Essentially this equals meters * (360 / 40007000).

### Angular velocity

Units Description
radian per second, radians per second This is a unit of measurement that defines the number of radians that something will rotate for every second of time that passes.
revolution per minute, revolutions per minute, rpm, rpms This is a unit of measurement that defines the number of full revolutions that something will complete for every minute of time that passes. A revolution is considered as a rotation of 360°.
rpm 1 over 16k This is the same as the rpm unit, only scaled by 16K using the formula: VALUE / 16384.0
minute per round, minutes per round This is a unit of measurement that defines the number minutes that something will require for to complete a full round. A round is considered as a rotation of 360°.
nice minute per round, nice minutes per round This is a unit of measurement that defines the number minutes that something will require for to complete a full round. A round is considered as a rotation of 360°.
degree per second, degrees per second This is a unit of measurement that defines the number of degrees that something will rotate for every second of time that passes.
degree per second ang16
degrees per second ang16
This is a unit of measurement that defines the number of degrees that something will rotate for every second of time that passes. The value is cast as a 16bit integer using the following formula: round(VALUE) / 65536.0

### Angular acceleration

Units Description
radian per second squared, radians per second squared This is the unit of angular (rotational) acceleration magnitude in the International System of Units (SI). Essentially it is the rate of change of angular speed or velocity by one radian per second during a one second period.
degree per second squared, degrees per second squared This is a unit of angular (rotational) acceleration magnitude. Essentially it is the rate of change of angular speed or velocity by one degree per second during a one second period.

### Speed

Units Description
meter per second, meters/second, m/s The metre per second is a unit of both speed and velocity in the International System of Units (SI). It is equal to the speed of a body covering a distance of one metre in one second of time.
meter per second scaler 256meters per second scaler 256 This is the same as the meter per second (above) only scaled by 1/256, ie: VALUE / 256.
meter per minute, meters per minute The metre per minute is a unit of both speed and velocity in the metric system. It is equal to the speed of a body covering a distance of one metre in one minute of time.
kilometer/hour, kilometers/hour, kilometers per hour, kph The kilometer per hour is a unit of both speed and velocity in the metric system. It is equal to the speed of a body covering a distance of one kilometer in one minute of time.
feet/second The feet/second is a unit of both speed and velocity in the imperial system. It is equal to the speed of a body covering a distance of one foot in one second of time.
feet/minute, ft/min The feet/minute is a unit of both speed and velocity in the imperial system. It is equal to the speed of a body covering a distance of one foot in one minute of time.
mile per hour, miles per hour, mph The mile per hour is a unit of both speed and velocity in the imperial system. It is equal to the speed of a body covering a distance of one mile in one hour of time.
knot, knots The knot is a unit of of both speed and velocity equal to one nautical mile per hour, which is 1.852kph using the metric scale and approximately 1.15078mph using the imperial scale.
knot scaler 128knots scaler 128 This is the same as the knot (above) only scaled by 1/128, ie: VALUE / 128.
mach, machs A mach number is a unit of of both speed and velocity based on an aircraft's speed relative to the speed of sound. An aircraft travelling at mach 1 is equivalent to 1234.8kph or 767.27mph.
mach 3d2 over 64k THis usnit will scale the mach value using the following formula: VALUE * (3.2 / 65536.0).

### Acceleration

Units Description
meter per second squared, meters per second squared The metre per second squared is the unit of acceleration in the International System of Units (SI). It is equal to the increase in speed in meters per second for every second that passes.
feet per second squared, foot per second squared The foot per second squared is the unit of acceleration in the imperial system. It is equal to the increase in speed in feet per second for every second that passes.
Gforce, G Force The g-force is a measurement of the type of force per unit mass - typically acceleration - that causes a perception of weight. A g-force of 1g is equal to the conventional value of gravitational acceleration on Earth - about 9.8 meters per second squared, or 32.174 feet per second squared.
G Force 624 scaled This is the same as the G Force unit, only scaled by 624 using the forumla: VALUE / 624

### Time

Units Description
second, seconds The second is the base unit of time in the International System of Units (SI), defined as 1⁄86400 of a day, or more accurately as being equal to the time duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the fundamental unperturbed ground-state of the caesium-133 atom.
minute, minutes The minute is a unit of time equal to 1⁄60 of an hour, or 60 seconds. Although not an SI unit, the minute is accepted for use with SI units.
hour, hours The hour is a unit of time in the International System of Units (SI), defined as 1⁄24 of a day, or more accurately as 3,600 atomic seconds.
day, days The day is a unit of time equal to 24 hour. Although not an SI unit, the day is accepted for use with SI units, and is equal to 86,400 seconds.
hour over 10, hours over 10 This is a unit of time equal to 1⁄10 of an hour, or 360 seconds.
year, years The year is a unit of time in the International System of Units (SI), defined as 3645.25 days of exactly 86,400 seconds, totalling exactly 31,557,600 seconds.

### Power

Units Description
Watt, Watts The watt is a unit of power in the International System of Units (SI). It is defined as a 1 joule per second.
ft lb per second Foot pounds per second are a unit of power using the imperial system. It is the energy transferred upon applying a force of 1 pound-force through a linear displacement of 1 foot over the time of 1 second.

### Volume rate

Units Description
meter cubed per second, meters cubed per second A cubic metre per second is a derived International System (SI) unit of volumetric flow rate equal to that of a cube of matter with sides of one metre in length exchanged or moving each second.
liter per hour, liters per hour This is a non-SI unit of volumetric flow rate, defined as the rate at which one liter of matter crosses a given surface during the period of time equal to one hour. 1 liter per hour is equivalent to 0.264172 gallons per hour.
gallon per hour, gallons per hour, gph

This is an imperial unit of volumetric flow rate, defined as the rate at which one gallon of matter crosses a given surface during the period of time equal to one hour. 1 gallon per hour is equivalent to 3.785411784 liters per hour.

### Weight

Units Description
kilogram, kilograms, kg

The kilogram is the base unit of mass in the International System of Units (SI). The kilogram is defined in terms of the second and the metre, based on fixed fundamental constants of nature. It is equivalent to 2.20462 pounds.

pound, pounds, lbs

The pound is a unit of mass in the imperial system. It is equivalent to 0.453592kilos.

pound scaler 256, pounds scaler 256 This is the same as the pound (above) only scaled by 1/256, ie: VALUE / 256.
slug, slugs, geepound, geepounds The slug is a unit of mass in the imperial system. A slug is defined as the mass that is accelerated by 1 foot per second when a net force of one pound is exerted on it. 1 slug is a mass equal to 32.1740 pounds or 14.59390 kilograms (based on standard gravity).

### Weight rate

Units Description
kilogram per second, kilograms per second

This is a unit of mass flow rate in the International System of Units (SI). It is defined as the mass of matter equal to one kilogram which crosses a given surface during the period of time equal to one second.

pound per hour, pounds per hour

This is a unit of mass flow rate in the imperial system. It is defined as the mass of matter equal to one pound which crosses a given surface during the period of time equal to one hour.

### Electrical current

Units Description
ampere, amperes, amp, amps The ampere is the base unit of electric current in the International System of Units (SI). A current of one ampere is one coulomb of charge going past a given point per second.
fs7 charging amps This is the same as the amp unit, only scaled using the following formula: VALUE * (50.0 / 65535.0).

### Electrical potential

Units Description
volt, volts The volt is the derived unit for electric potential, electric potential difference (voltage), and electromotive force. It is the potential difference between two points that will impart one joule of energy per coulomb of charge that passes through it, and can be expressed in terms of SI base units.

### Frequency

Units Description
Hertz, Hz, The hertz is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.
Kilohertz, KHz This is a measure of frequency equivalent to 1,000 cycles per second (103 hertz).
Megahertz, MHz This is a measure of frequency equivalent to 1,000,000 cycles per second (106 hertz).
Frequency BCD16 This is a definition of a frequency using a 16bit binary coded decimal.
Frequency BCD32 This is a definition of a frequency using a 32bit binary coded decimal.
Frequency ADF BCD32 This is a definition of an ADF frequency using a 32bit binary coded decimal.

### Density

Units Description
kilogram per cubic meter, kilograms per cubic meter The kilogram per cubic metre is an SI derived unit of density. It is defined by mass in kilograms divided by volume in cubic metres. It is equivalent to 0.00194032 slug per cubic foot, or 0.0083454 pounds per gallon.
Slug per cubic feet, Slugs per cubic feet, Slug/ft3, slug per cubic foot, slugsper cubic foot The slug per cubic foot is an imperial unit of density. It is defined by the mass of a slug divided by volume in cubic feet. It is equivalent to 515.379 kilograms per cubic meter, or 4.30104 pounds per gallon.
pound per gallon, pounds per gallon, lbs/gallon The pound per gallon is an imperial unit of density. It is defined by the mass of a pound divided by volume in gallons. It is equivalent to 119.826 kilograms per cubic meter, or 0.232502 slug per cubic feet.

### Pressure

Units Description
pascal, pascals, Pa The pascal is the SI derived unit of pressure used to quantify internal pressure. The unit, is defined as one newton per square meter.
kilopascal, kpa This is a measure of pressure equivalent to 1,000 pascal (103 pascal).
millimeter of mercury, millimeters of mercury, mmHg

A millimeter of mercury is a unit of pressure. It is defined as the extra pressure generated by a column of mercury one millimeter high under the force of 1 gravity. It is equivalent to 133.322 pascals, or 0.019337psi.

centimeter of mercury, centimeters of mercury, cmHg

A centimeter of mercury is a unit of pressure. It is defined as the extra pressure generated by a column of mercury one centimeter high under the force of 1 gravity. It is equivalent to 1333.223 pascals, or 0.193367psi.

inch of mercury, inches of mercury, inHg An inch of mercury is a unit of pressure. It is defined as the extra pressure generated by a column of mercury one centimeter high under the force of 1 gravity. It is equivalent to 3386.39 pascals, or 0.491154psi.
inHg 64 over 64k This unit is for inches of mercury, only the value has been scaled using the following formula: (64.0 / 65536.0) * VALUE. Generally only required for describing units of manifold pressure.
millimeter of water, millimeters of water

A millimeter of water is a unit of pressure. It is defined as the extra pressure generated by a column of water 1 mm high with a density of 1 gram per cubic centimeter, under the force of 1 gravity. It is equivalent to 9.80638 pascals, or 0.0014223psi.

Newton per square meter, newtons per square meter Newtons per square meter is a unit that shows how the pascal unit is derived from other SI units. 1 newton per square meter equals 1 pascal.
kilogram force per square centimeter, KgFSqCm

Kilogram force per square centimeter is a unit of pressure which is not a part of the International System of Units (SI). It is equivalent to 98066.5 pascals, or 14.2233psi.

kilogram meter squared, kilograms meter squared Kilograms per square meter is a unit of measurement of surface density. It is equivalent to 9.80665 pascals, or 0.001423psi.
atmosphere, atmospheres, atm The atmosphere is a unit of pressure defined as approximately equal to Earth's atmospheric pressure at sea level. It is equivalent to 101325 pascals, or 14.6959psi.
bar, bars The bar is a metric unit of pressure, but not part of the International System of Units (SI). It is defined as exactly equal to 100,000 pascals, equivalent to 14.50378psi.
millibar, millibars, mbar, mbars, hectopascal, hectopascals

The millibar is a metric unit of pressure, but not part of the International System of Units (SI). It is defined as exactly equal to 1000 pascals, equivalent to 0.0145psi.

millibar scaler 16millibars scaler 16 This unit is the same as the millibar (above), only scaled by a factor of 1/16, ie: VALUE / 16;
pound-force per square inch, psi The pound-force per square inch is an imperial unit of pressure. It is equivalent to 6894.76 pascals.
psi scaler 16k This is the psi value scaled by 16K, using the formula: VALUE / 16384.0
psi 4 over 16k This is the psi value scaled using the formula: (4 / 16384.0) * VALUE
psi fs7 oil pressure This is the psi value scaled using the formula: (55.0 / 16384) * VALUE. Only usually used when dealing with engine oil pressure.
pound-force per square foot, psf The pound-force per square foot is an imperial unit of pressure. It is equivalent to 47.8803 pascals.
psf scaler 16k This is the psf value scaled by 16K, using the formula: VALUE / 16384.0
slug feet squared, slugs feet squared The slug square foot is a unit of moment of inertia in imperial units. It is equivalent to 32.17405 pound foot squared, or 1.35582 Kilogram Square Meters.
boost cmHg A centimeter of mercury is a unit of pressure. It is defined as the extra pressure generated by a column of mercury one centimeter high under the force of 1 gravity. It is equivalent to 1333.223 pascals, or 0.193367psi. This unit is used when defining the boost provided by superchargers or turbochargers on equipped planes.
boost inHg An inch of mercury is a unit of pressure. It is defined as the extra pressure generated by a column of mercury one centimeter high under the force of 1 gravity. It is equivalent to 3386.39 pascals, or 0.491154psi. This unit is used when defining the boost provided by superchargers or turbochargers on equipped planes.
boost psi The pound-force per square inch is an imperial unit of pressure. It is equivalent to 6894.76 pascals. This unit is used when defining the boost provided by superchargers or turbochargers on equipped planes.

### Torque

Units Description
Newton meter, Newton, meters, nm The newton meter is a unit of torque in the International System of Units (SI). One newton-metre is equal to the torque resulting from a force of one newton applied perpendicularly to the end of a moment arm that is one metre long.
foot-pound, foot pound, ft-lbs, foot-pounds The foot-pound is a unit of energy in the imperial unit of measure. It is the energy transferred upon applying a force of one pound-force through a linear displacement of one foot. The corresponding SI unit is the joule.
lbf-feet A pound-foot is a unit of torque representing one pound of force acting at a perpendicular distance of one foot from a pivot point. Conversely one pound-foot is the moment about an axis that applies one pound-force at a radius of one foot.
kilogram meter, kilogram meters, kgf meter, kgf meters A kilogram-force meter is an International System of Units (SI) unit of torque representing one kilogram-force applied perpendicularly to a one-meter long moment arm.
poundal feet One poundal is the force that accelerates a mass of 1 pound at a rate of one foot per second per second. So a poundal foot is a unit of torque representing one poundal of force acting at a perpendicular distance of one foot from a pivot point.

### Miscellaneous Units

Units Description
FractionalLatLonDigits The number of fractional lat / lon digits.
part This is a base unit that will be used to make conversions when using other units in RPN and SimVar calculations.
half, halfs The input will be halved.
third, thirds The input will be divided by 3.
percent, percentage Normally a value between 0 and 100, though sometimes values outside this range are possible (reverse thrust, for example).
percent over 100 Normally a value between 0.0 and 1.0, though sometimes values outside this range are possible (reverse thrust, for example).
percent scaler 16k This is a precentage value scaled by 16K, using the formula: VALUE / 16384.0
percent scaler 32k This is a precentage value scaled by 32K, using the formula: VALUE / 32767.0
percent scaler 2pow23 This is a precentage value scaled by 223, using the formula: VALUE / 8388608.0
bel, bels The bel is a unit used in the comparison of power levels in electrical communication or of intensities of sound, corresponding to an intensity ratio of 10 to 1.
decibel, decibels The decibel is a relative unit of measurement equal to one tenth of a bel.
more_than_a_half The input will be converted to either 0 (if it is less than a half of the "part" base value) or 1 (if it is more than half of the "part" base value)
times The input value is a multiplier.
ratio The input value is expected to be a ratio.
number, numbers The input value is expected to be any real number.
scaler The input value is expected to be a scaler.
position, position 16K, position 32K, position 128 The input value will be converted to an integer position value either using the "part" base scale, or as a 16 bit or 32bit integer, or as an integer between 0 and 128.
Enum A positive or negative integer corresponding to the member of the enum
Bool, Boolean The only reliable numeric equivalent is that 0 is returned for False. Non-zero values, especially both 1 and -1, are used to indicate True.
Bco16 This unit requires a four digit octal number, and is usually only used for transponder codes.
mask This indicates that the value is a bitmask where one or more bits in the value will be true/false, and each bit will represent a specific item.
flags This indicates a selection of one or more flag values combined into a single value.
string This unit expects some kind of string input.
per radian The input is value that will be a ratio "per radian".
per degree The input is value that will be a ratio "per degree".
keyframekeyframes The input is for an animation keyframe and will be divided by 200.

### Structs And Other Complex Units

The following units are used when the value is a struct or something other than a single value float or integer. In general these units are only used when retrieving the output from a specific SimVar and would never be used to define any inputs.

Units Description
XYZ

This unit signifies a 3 value struct with the values (all 32bit floats):

• x - a value representing an X position
• y - a value representing an Y position
• z - a value representing an Z position

This struct unit is required by the following SimVars:

• STRUCT_BODY_ROTATION_ACCELERATION
• STRUCT_BODY_ROTATION_VELOCITY
• STRUCT_BODY_VELOCITY
• STRUCT_ENGINE_POSITION
• STRUCT_EYEPOINT_DYNAMIC_ANGLE
• STRUCT_EYEPOINT_DYNAMIC_OFFSET
• STRUCT_SURFACE_RELATIVE_VELOCITY
• STRUCT_WORLDVELOCITY
• STRUCT_WORLD_ACCELERATION
• STRUCT_WORLD_ROTATION_VELOCITY
PBH

This unit signifies a 3 value struct with the values (all 32bit integers):

• pitch - the pitch value
• bank - the bank value
• heading - the heading value

This struct unit is required by the following SimVars:

• LANDING_LIGHT_PBH
• STRUCT_PBH32
latlonaltpbh

This unit signifies a 6 value struct with the values:

• lat - a latitude, expressed as a 64bit integer where the first 16bits are padding, the next 32bits are the integer value and the last 16bits are the fraction.
• lon - a longitude, expressed as 64bit integer where the lower 16bits are the fractional part, the upper 32 bits are the integer part and the rest is padding.
• alt - an alttude, expressed as a 64bit integer where the first 16bits are padding, the next 32bits are the integer value and the last 16bits are the fraction.
• pitch - the pitch value, expressed as 32bit integer
• bank - the bank value, expressed as 32bit integer
• heading - the heading value, expressed as 32bit integer

This struct unit is required by the following SimVars:

latlonalt

This unit signifies a 6 value struct with the values:

• lat - a latitude, expressed as a 64bit integer where the first 16bits are padding, the next 32bits are the integer value and the last 16bits are the fraction.
• lon - a longitude, expressed as 64bit integer where the lower 16bits are the fractional part, the upper 32 bits are the integer part and the rest is padding.
• alt - an alttude, expressed as a 64bit integer where the first 16bits are padding, the next 32bits are the integer value and the last 16bits are the fraction.

This struct unit is required by the following SimVars:

• ADF LATLONALT
• INNER_MARKER_LATLONALT
• MIDDLE_MARKER_LATLONALT
• NAV_DME_LATLONALT
• NAV_GS_LATLONALT
• NAV_VOR_LATLONALT
• OUTER_MARKER_LATLONALT
• STRUCT_LATLONALT
PID_STRUCT

This unit signifies a 7 value struct containing PID controller state with the values (all 64bit floats):

• pid_p - the proportional value
• pid_i - the first integral value
• pid_i2 - the second integral value
• pid_d - the proportional value
• i_boundary - the first integral boundary value
• i2_boundary - the second integral boundary value
• d_boundary - the derivative boundary value

This struct is returned by the following SimVars:

• STRUC_AIRSPEED_HOLD_PID_CONSTS
• STRUC_HEADING_HOLD_PID_CONSTS
POIList This unit signifies that the returned value is an array of POI data. This unit is only used within the JS for HTML gauges.
GlassCockpitSettings

This unit is only used when retrieving the cockpit struct within the JS for HTML gauges.

For the contents of this struct, please see the section on the Glass Cockpit Settings Struct.

FuelLevels

This unit is for retrieving the fuel levels of all tanks and will return a struct containing the following values (all 32bit floats):

• Center
• LeftMain
• RightMain
• LeftAux
• RightAux
• LeftTip
• RightTip
• Center2
• Center3
• External1
• External2