Maintenance

Figure 2-14.—Ship’s binoculars arrangement and operating controls. 2-12 7. Rotate the variable-density control knob to control light and glare from the target field. Full clockwise rotation of the knob brings the polarizing filter, aligned for maximum light transmission, into the light paths. Gradual counterclockwise turns reduce light transmission to the minimum. 8. To lock the binocular assembly in the desired position, tighten the azimuth carriage and carriage assembly elevation lock knobs. A slight amount of friction may be introduced by leaving the elevation lock knobs slightly loose. When the binocular is not in use, lower the carriage to its lowest position, secure all locks, and install the canvas cover over the binocular assembly. Maintenance Maintenance should be performed according to the MRC. Scheduled maintenance includes routine inspection, cleaning, lubrication, and adjustments that can be made without removing the binoculars from the ship. CAUTION The optical parts sealed within the body of binoculars may be seriously damaged by contamination if the body seal is broken. Any repair or adjustment requiring opening the body should be made by the appropriate fa- cility. Ship binoculars should be inspected daily to make sure they are in good working order both optically and mechanically. This includes checking the locking mechanisms, elevation, and rotation; external surfaces; rubber components for deterioration; and all controls to ensure a snug fit between their respective shafts and preformed packing. The objective and eyepiece lenses are to be cleaned using appropriate cleaning material according to the MRC. However, unnecessary cleaning should be avoided. Wipe the metal parts of the binoculars with fresh water and detergent to prevent accumulation of salt and dirt. When lubricating, remove the old lubricant and residue. Apply new lubricant sparingly as required. The angular elevation clamp, round boss, and lock pin should be lubricated at each removal or replacement. Remove the access cover to lubricate the gear