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opt viewing syst 5.5 in.dia eye lens 1 opt wide angle 85 deg angle field of view 27.5 deg forward of vert opt axis; elec operated ac 115v 400 hz regulated hz 1 phase, dc 28v; vibration isolator mtg; w/o carrying case; w/air circulating and drying syst; w/mtd circ slide rule on instrument panel; access 1 data plate
An instrument designed for use in conjunction with aircraft cameras. It provides a clear unobstructed view of the terrain below and in some cases, ahead of the aircraft for the photographer or navigator. It provides a means for determining the correct exposure interval. It may also include optical drift system for determining ground speed or angular drift. Excludes view finder, camera; view finder, camera, television and view finder, camera, photographic.
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
Precious metal content is unknown
The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
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.