TM 55-4920-390-13&P
Operation then is exactly like the older models. The pattern is determined by the placement of strikers and cannot be
spread or stacked at will as in 4-7, but the Position can still be adjusted by the "Position" control knob on the bulkhead.
NOTE
The useful characteristic of the material from which the retro-reflective targets is made is its ability
to reflect light back to its source regardless of the incidence of the light. Thus the operator must
hold the lamp (source) directly in front of his face and only he, or to a lesser extent one or two
others (if they are close enough), will see the targets. DO NOT EXPECT A GROUP TO BE ABLE TO
SEE THE TARGETS simultaneously, for all but one or two near the source will be too far "off axis"
to see the reflection.
4-12. CARRYING THE STROBEX WHILE IN SERVICE . It is often necessary or convenient to move the Strobex
around the cabin of the helicopter while observing track. One may want to look at the "other" rotor on a double rotor ship
or look at the rotor at a different point in azimuth from a different window. The Strobex can easily be carried, with lamp
and cables deployed simply by grasping lid and case near the bulkhead, as in Fig. 4-3.
4-13. SECURING TRACKER. After the tracking operation, secure the tracker for storage in accordance with 3-4.
Figure 4-3. Carrying the Strobex while in Service.
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