Functionality in the areas:
- Readability
- Operability
- Accuracy
- Power reserve
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Resistance in the areas:
- Water resistance
- Temperature change
- Ambient pressure
- G-loads
- Vibrations
- Shock and impact resistance
- Liquids typical of flight operations
- Magnetic fields
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Security and compatibility in the areas:
- Magnetic signature
- Glare
- Compatibility with cockpit lighting & night vision devices
- Strap attachment
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