The internal unit for the H-5 searchlight signal is a radical departure from that used in the H and H-2 styles.� The redesign was an attempt at making servicing the signal easier.� Improvements included the addition of a swing up carrying handle, the elimination of the inner compound lens from the front of the unit, a separate light assembly unit, the replacement of bolts used to secure the unit in the housing with a lever mechanism and addition of pin type connectors as opposed to terminal screws.

Below.� Rear view of internal unit showing colored roundels behind a protective glass.� A carrying handle lifts up to enable easy handling of the unit.� The terminal pins and rotating terminal locking bar are on the top of the back of the unit.

Above and left.� Side and top views.

Above.� Front view of internal unit.� Note the conical cover glass as opposed to a lens.� This shape was used over a flat glass as it enables the glass to expand and contract easier decreasing the chance of breakage due to heat build-up.� Later roundels also have this shape.

Below.� Light unit with integral adjustable voltage dropping resistor in rear.