the vernier still reads zero and has not moved during theoperation.NOTE: To compensate for the above maladjust-ment, you should read all vertical angles direct andreversed; then use the average of the result.This concludes our discussion of instrumentadjustment. As a reminder, you should always checkyour surveying instruments frequently for properadjustment and then make those adjustments eitherimmediately or as soon as practicable. Do not put it offor you may quickly forget to do it until it is too late. Also,be sure to check the manufacturer’s instructions beforemaking the adjustments described above or when youneed to adjust other instruments, such as the automaticlevel, alidade, or hand level.MINOR REPAIRS AND REPLACEMENTPROCEDURESAs stated earlier in this chapter, minor repairs tosurveying instruments and equipment are those that canbe done in the field with the use of simple tools. Majorrepairs are done by instrument specialists who aregenerally employed by the manufacturers of theinstruments. You should never attempt to make a majorrepair yourself.Repair It or Replace It?Whether or not you or someone else in the battalionshould attempt the repair of a damaged item ofequipment depends on the nature of the damage and thecharacter of the item. A broken tape, for example, caneasily be spliced (explained in the EA3 TRAMAN). Onthe other hand, whether or not you should attempt tostraighten a bent compass needle depends on the type ofcompass —for an ordinary pocket compass, perhapsyes; for the compass on a transit, perhaps no. Many typesof damage to such articles as range poles, tripod legs,and the like may be repaired in the battalion or PWDshops. Minor damage to instruments maybe repairedoccasionally in the battalion machine shop. However,major repairs to instruments, when they areeconomically worthwhile at all, should be done bymanufacturers or their authorized representatives or bycompetent Navy instrument repairmen.When in the judgment of the senior EA or theengineering of!icer concerned an instrument is beyondeconomical repair, it must be surveyed (properlydisposed of) by standard survey procedures. Then areplacement instrument must be ordered fkom the Navysupply system. Expendable items are procured in thesame manner.Navy Supply SystemEach individual item of equipment or supply that isavailable through the Navy supply system is identifiedby a stock number and listed and described in a stockcatalog. Identification of the items that may be drawnfrom supply by a battalion and the maximum number ofeach item a battalion may have are set forth in anallowance list. When the number of items available in abattalion falls short of the allowance (because ofexpenditure, wear, casualty, loss, or some other type ofattrition), 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 usingthe battalion or PWD shops personnel expertise. Mostitems, however, are replaced from supply; that is, theyare ordered from the nearest available naval supplydepot.To replenish an item, you must order by stocknumber and follow a prescribed procedure. To learn thecorrect procedures, you should get in touch with one ofthe supply petty officers in the battalion or study thechapters on the Navy supply system in MilitaryRequirements for Petty Officer Third Class,NAVEDTRA 12044, and Military Requirements forPetty Officer Second Class, NAVEDTRA 12045.NMCB Surveyor’s KitEvery NMCB is properly outfitted with adequatesurveying supplies and equipment. These necessaryitems are listed in the NMCB Table of Allowance (TOA)and are contained in Surveyor Kit #80010. For thisreason, no attempt will be made to list all the equipmentand supplies currently carried in the standard surveyorkit. Normally, four complete kits will be carried in thebattalion allowance. They are available for check-out tothe surveyor section supervisor or the senior EA. It isthe responsibility of each survey party chief to makesure that the kit assigned to the crew is complete. Thekits are required to be inventoried during turnover andat twice-monthly intervals throughout deployment. Thepurpose of these inventories is to ensure 100-percentaccountability of the items contained in the kit and toensure that all of those items are in a proper state of goodrepair. Remember, if you have custody of the kit, you6-9
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