00682nam a22001337a 4500008004500000020001500045082001800060100001400078245004600092250001200138260002700150300001500177520035600192230619b      1982     ||||| |||| 00| 0 eng d  a0851744265  a623.892	bFRO  aFrost, A.  aMarine Gyro Compasses For Ships' Officers  a1st ed.  aBritainbGlasgowc1982  axix, 145p.  aMarine Gyro Compasses for Ships' 0fficers has been written to cover the syllabuses for all grades of Department of Trade certificates of competency for deck officers in the Merchant Navy. The first section of the text discusses the free gyroscope and its properties which enable it to be converted into an instrument which provides a north reference.