A nut and lead screw assembly is disclosed. Each leg has a free end and an axial passage extending into the leg from that end so that the retainer may be positioned on the container wall with each opening in register with a perforation therein. The electrical elements include light emitting diodes, a plurality of resistors and a zener diode. The turbulence data circuit can include an interface for coupling to the radar system, the display, the flight management system, and the aircraft inertialair data system. An information processor receives and samples the sets of image data to generate sample data for computing a fused image array. The sidewall coating at the sidewalls of the first trench and at the sidewalls of the second trench are of the same material.