1220006703050
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1220-00-670-3050 Specification Set by the OEM (see RNCC code 3)
1 to 20000 yd scale ratio; time difference scale 5 to 1 graduation in degrees for irregular base plotting 1 ea 4, 4.5, and 5.5 SOUND-Second SUB-Base lg grad; for specific use ord u/w sound ranging wind corrector model M1; all components and/or accessories listed in ord 7 SNL-154; used to determine location of enemy guns by plotting difference in tine at which the sound of the gun reaches ea of several microphone stations
Cross Reference Parts Part numbers that meet the specification outlined on this page and set by the OEM
Identification Item Identification Guide (IIG) and Item Name Code (INC)
Definition Definition of approved item name (AIN): "PLOTTING BOARD,SOUND RANGING,FIR"
An item used to determine the location of enemy guns by plotting the difference in time at which the sound of the gun reaches each of several microphone stations. It may also be used for adjustments of gun and howitzer fire to compensate for the trajectory of the projectile. Excludes sound ranging set and sound measuring set.
1220-00-670-3050 Material Hazmat, Precious Metals, Criticality, Enviroment, and ESD
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
Item does not contain precious metal.
Represents items with no adp components
The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Identification Codes
HMIC: Hazardous Material Indicator Code. A one position code that identifies a hazardous item.
PMIC: Precious Metal Indicator Code. A one position code which identifies items that have precious metals as part of their content. precious metals are those metals generally considered to be uncommon, highly valuable, and relatively superior in certain properties such as resistance to corrosion and electrical conductivity.
ESD: Electrostatic Discharge. Indicates if an item is susceptible to electrostatic discharge or electromagnetic interference damage. electrostatic discharge damage occurs when an accumulation of static electricity generated by the relative motion or separation of materials is released to another item by direct contact. electromagnetic interference damage occurs when an item comes into proximity with an electrostatic or magnetic field.
ENAC: Enviromental Attribute Code. Identifies items with environmentally preferred characteristics.
CRITL: Criticality Indicator Code. Indicates an item is technically critical by tolerance, fit, application, nuclear hardness properties, or other characteristics.
