00493nam a22001577a 4500 2444 2444 200303b ||||| |||| 00| 0 eng d 623.86 O365 2033 O'Hara, Walter J. Mariner's gyro-navigation manual, for masters, mates, marine engineers and potential ship's officers 1st ed. Cambridge Cornell Maritime 1951 xviii,164 p. 22.08 2034 Gyro Compass BK 0 0 ddc 0 623_860000000000000_O365 0 7064 CL CL 1954-03-10 A. H. Wheeler 623.86 O365 02011 2020-03-03 BK