APPENDICES 



APPENDIX I 



Conversion Tables 



(a) Fathoms and Mètres. 

 One fathom= i"828 mètres. Approximate équivalents are 



(b) Marine Distances. 



One sea-mile is 6,080 feet, or r852 kilomètres. 



A cable's length is 8 shackles, or 100 fathoms (strictly 

 202-7 yards). 



A knot is a unit of speed, and is a speed of 6,080 feet per 

 hour. It is incorrect to speak of " knots per hour." 



On the assumption that the earth is a sphère, the length of 

 an arc of a meridian subtending an angle of one minute at the 

 centre is 6,077 ^^et ; the nearest whole number to this, 6,080 

 feet, has been taken as the length of the mean nautical mile. 



