4331 HYDROGRAPHIC MANUAL PaGE 334 



All survey equipment and instruments shall be reported on the ship's inventory, 

 except equipment expended in place which does not bear either Coast and Geodetic 

 Survey or manufacturer's numbers. Replacement parts are expended in place when 

 they are installed. 



4331. Expenditure of Instruments 



When equipment or instruments are lost or extensively damaged, the facts shall be 

 reported promptly to the Washington Office. When instruments have become un- 

 serviceable through use or age, authority to expend them should be requested from the 

 Washington Office. No inventoriable equipment or instruments may be expended 

 without authority and such authority will not be granted without a complete report of 

 the facts and circumstances. Copies of such letters should be attached to and submitted 

 with the instrument inventory. 



434, Shipments of Instruments 



Instruments that are returned to the Washington Office must be reported on 

 Form 573, Letter of Transmittal and Receipt for Transfer of Instruments or General 

 Property. Instructions on the back of the form must be followed. Shipment must 

 be by the most economic method. A list of the instruments packed in each case 

 shipped must be included in the packing case. 



Each instrument to be shipped must be firmly secured in its box, but in such a 

 manner that delicate parts will not be injured by wedging or pressure. Cushions of 

 paper, or other packing material, should be placed not only between the individual 

 instrument boxes but between these and the packing case. Since the packing case may 

 be inverted in transit, the contents must be seciu-ed so that nothing in it can come loose. 

 Packing cases containing instruments of various weights should be packed with 

 special care. 



Shredded paper, when obtainable, should be used for packing instruments. 

 Chopped-up paper, crushed paper, and cotton make good substitutes. The use of 

 sawdust or excelsior for this purpose is prohibited. An extremely fine dust from these 

 seems to penetrate even hermetically sealed joints. They absorb oil readily and, by 

 contact, may dry the oil from a bearing with probable impairment. They also retain 

 moisture which may damage the contents. 



Special precautions must be used in preparing some instruments for shipment. 

 For example, the parts of a standard tide gage which easily become loose, or which might 

 swing about, should be lashed. To prevent the pencil screw from moving endways, 

 one end should be secured to the capstan locknut of the counterpoise drum and the other 

 end to the capstan bearing pin of the pencil screw. The pencil arm should be tied to 

 the hour-tripping rod, which in turn should be lashed to the upper tie rod of the gage. 

 The receiving roller is then lashed to the lower tie rod. 



A standard tide gage must also be removed from its packing case with special 

 caution. It must not be grasped by the hour-tripping rod, pencil screw, or other deli- 

 cate parts during removal, as they might be damaged. 



The heavy float and the top and bottom sections of the pipe, usually packed with 

 the portable gage, must be secured firmly to prevent damage to other parts of the gage. 



The glass face of any instrument, such as a clock, compass, or pelorus must be 

 protected by a paper cushion. In the case of a compass or pelorus, the instrument 

 should be dismounted from its gimbals, the bottom of its case then padded with soft 



