The Norden Bomb Sight manual

Contents · Section XI continued

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B. Incorrect Speed of Drive of Telescope Quadrant213

C. The Position of the Transverse Hair Is Out of Relationship To The Posi- tion of the Telescope Quadrant213

Beam and Tape215-217

Reference Publications218

Low Altitude Attachment218

Vault Material218

Review of Sight Nomenclature219-220

Defects and Malfunctions221-223

Some Common Sight Errors and Reasons224

Points To Be Remembered225

Check For Electrical Short Circuits226

Bearings227

Standard Clearance and Notes227

Substitutes For Prescribed Equipment Used In Calibration and Maintenance228

Bombsight Cover, Type A-1229

Acceptance of Sight, Stabilizer and Calibration Units231

Comparison Chart233

Ball Bearing Chart234

XII

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