Be Expert with Map and Compass
... compasses have either a 360 ° scale or a graduation in cardinal or intercardinal points ( N , S , E , W , NE , SE , etc. ) . The graduation may be either fixed in the bottom of the compass housing or printed around the housing's ...
Handbook of Magnetic Compass, Adjustment and Compensaton
... compasses and the records to be kept on those compasses , and embodies , in essence , the instruction given in the U. S. Navy Regu- lations regarding the magnetic compasses on board ship . " The following instructions relative to compass ...
The Magnetism of Ships, and the Mariner's Compass
... compasses , 1844 , when under com- mand of the late Captain N. Lockyer , C.B. ] " Walker's compass differs from the other compasses supplied , in its being a dipping compass , which preserves its horizontal position in all latitudes ...
Practical Illustrations of the Necessity for Ascertaining the Deviations of the Compass
... compasses , in every ship a closet is to be constructed in a dry place , sufficiently large for the reception of the ... Compass which 86 ON THE DEVIATIONS OF THE COMPASS .
The Compass
... compasses and pass a fine thread through each hole from the outside , and knot it on the inside , the distance between the points being made equal to the major axis . Then with the compasses opened to half the length of the major axis ...
Admiralty Manual for the Deviations of the Compass
... Compass , the helmsman will notice the point shown by the Binnacle Compass as being that to which he has to attend ; and a comparison of the two compasses should be frequently repeated by the officer of the watch or the quartermaster ...
Magnetic Compasses and Magnetometers
Anthology of compass knowledge, compiled for the benefit of investigators in the magnetic art and presenting... the guiding principles and rules for the design, construction, and operation of instruments for sensing and measuring the earth ...
The Encyclopaedia Britannica, Or, Dictionary of Arts, Sciences, and General Literature
... COMPASSES , or Pair of COMPASSES , a mathematical instrument for describing circles , measuring figures , and the like . The common compasses consist of two sharp - pointed branches or legs of iron , steel , brass , or other metal ...
American Copper & Brass
... Compasses and calipers J. E. Earle Leicester , Mass Aug. 1 , 1854 11,420 Compasses and calipers F. P. Pfileghar and W. Scholl- New Haven , Conn ..... Jan. 9 , 1866 51,967 horn . Compasses and calipers , Combined beam W. Burrows New York ...
The 'Routledge' engineers' slide rule, its history and use
... compasses . To multiply 15 by 4 by means of the compasses see Fig . 3 , page 8 . Calling the first figure 10 , then extend the compasses from thence to the fifth division , which is 15 ( half between the 10 and 20 ) . Add this space ...
A Manual of the Principal Instruments Used in American Engineering and Surveying
... COMPASSES 325 Clamp and Tangent fitted to ball spindle of Compasses Nos . 285 , 288 , 300 , 305 , and 315 to 319 326 Rack and Pinion to variation arc of Compasses Nos . 288 to 312 327 Leveling Adopter , small size . See page 185 . 328 ...
Practice of Navigation and Nautical Astronomy
... compasses of ships , which were found to be wrong in south latitude , by placing a vertical bar of iron in front of the compass . Every ship should have a standard compass . It should be placed over the midship line of the deck upon a ...
Transactions and Proceedings of the Royal Society of New Zealand
... compass ; one was placed immediately in front of the wheel , the other about thirty feet forward . Upon no course steered during the voyage did the compasses indicate alike ; there were continual , though not constant , differences ...
The Naval Observatory
... Compass Division . It has charge of the design and procurement of gyro - compasses and their installation on vessels of the Navy ; it issues to vessels having gyro - compasses , equip- ment report forms and record books , and receives ...
Annual Report of the Board of Regents of the Smithsonian Institution
... compass card to assure that the instrument is horizontal . The whole system is mounted on gymbals and attached to the binnacle with springs after the usual manner with marine magnetic compasses . The damping of the oscillations of the ...
Handbook to the Special Loan Collection of Scientific Apparatus
... Compasses such as we now use , and indeed several of very different forms , have been found in the excavations of Pompeii . But it is probable that the use of the compasses , which is now universal , for transferring with exactness ...
Practice of Navigation and Nautical Astronomy ... Fourth Edition
... compasses readjusted . A little care in the first instance would have prevented this delay and expense . In whatever part of the ship the compasses are fixed , they should always be on the midship line of the deck , at an equal distance ...
The workman's manual of engineering drawing
... compass centre marks should hardly be seen . The ink leg , especially for small circles , should be shorter than the other . In drawing a circle the compasses should be held by the top , by the right hand ( without holding the centre ...
Journal of the Franklin Institute
... compasses have now been installed on twenty battleships , one armored cruiser , and fifteen submarines of the United States Navy , and it has recently been decided to install master compasses in duplicate on all battleships of the ...