MINOR REPAIRS AND REPLACEMENT PROCEDURES

the vernier still reads zero and has not moved during the operation. NOTE: To compensate for the above maladjust- ment, you should read all vertical angles direct and reversed; then use the average of the result. This concludes our discussion of instrument adjustment. As a reminder, you should always check your surveying instruments frequently for proper adjustment and then make those adjustments either immediately or as soon as practicable. Do not put it off or you may quickly forget to do it until it is too late. Also, be sure to check the manufacturer’s instructions before making the adjustments described above or when you need to adjust other instruments, such as the automatic level, alidade, or hand level. MINOR REPAIRS AND REPLACEMENT PROCEDURES As stated earlier in this chapter, minor repairs to surveying instruments and equipment are those that can be done in the field with the use of simple tools. Major repairs are done by instrument specialists who are generally employed by the manufacturers of the instruments. You should never attempt to make a major repair yourself. Repair It or Replace It? Whether or not you or someone else in the battalion should attempt the repair of a damaged item of equipment depends on the nature of the damage and the character of the item. A broken tape, for example, can easily be spliced (explained in the EA3 TRAMAN). On the other hand, whether or not you should attempt to straighten a bent compass needle depends on the type of compass —for an ordinary pocket compass, perhaps yes; for the compass on a transit, perhaps no. Many types of damage to such articles as range poles, tripod legs, and the like may be repaired in the battalion or PWD shops. Minor damage to instruments maybe repaired occasionally in the battalion machine shop. However, major repairs to instruments, when they are economically worthwhile at all, should be done by manufacturers or their authorized representatives or by competent Navy instrument repairmen. When in the judgment of the senior EA or the engineering of!icer concerned an instrument is beyond economical repair, it must be surveyed (properly disposed of) by standard survey procedures. Then a replacement instrument must be ordered fkom the Navy supply system. Expendable items are procured in the same manner. Navy Supply System Each individual item of equipment or supply that is available through the Navy supply system is identified by a stock number and listed and described in a stock catalog. Identification of the items that may be drawn from supply by a battalion and the maximum number of each item a battalion may have are set forth in an allowance list. When the number of items available in a battalion falls short of the allowance (because of expenditure, wear, casualty, loss, or some other type of attrition), the shortage must be replaced. Some items, such as range poles, chaining pins, bull-points, turning-point pins, targets, stake bags, equipment boxes, and the like, may be replaced by using the battalion or PWD shops personnel expertise. Most items, however, are replaced from supply; that is, they are ordered from the nearest available naval supply depot. To replenish an item, you must order by stock number and follow a prescribed procedure. To learn the correct procedures, you should get in touch with one of the supply petty officers in the battalion or study the chapters on the Navy supply system in Military Requirements for Petty Officer Third Class, NAVEDTRA 12044, and Military Requirements for Petty Officer Second Class, NAVEDTRA 12045. NMCB Surveyor’s Kit Every NMCB is properly outfitted with adequate surveying supplies and equipment. These necessary items are listed in the NMCB Table of Allowance (TOA) and are contained in Surveyor Kit #80010. For this reason, no attempt will be made to list all the equipment and supplies currently carried in the standard surveyor kit. Normally, four complete kits will be carried in the battalion allowance. They are available for check-out to the surveyor section supervisor or the senior EA. It is the responsibility of each survey party chief to make sure that the kit assigned to the crew is complete. The kits are required to be inventoried during turnover and at twice-monthly intervals throughout deployment. The purpose of these inventories is to ensure 100-percent accountability of the items contained in the kit and to ensure that all of those items are in a proper state of good repair. Remember, if you have custody of the kit, you 6-9