A professional who selects and arranges specified type and quantity of component parts in trays preparatory to line assembly of surveying instruments. Responsibilities include:

• Positions instrument base or support structure (standard) in jig, and spreads bracket of standard to specified width to facilitate attachment of parts, using tongs.
• Files burrs from bracket holes, using hand file.
• Selects component parts from stock bins, according to instrument being assembled, and examines parts for defects.
• Arranges parts in tray and places tray on assembly line conveyor.
• Tallies number of trays assembled, using counter.