Omega propagation correction tabels :  for 10.2 kHz, area 25 South Polar Station B (Liberia) 

 - Washington, D.C. :  United States Department of Defense mapping agency,  1980 
 - x,46 p. ;  27 cm. 
<br/><br/> Pub.224 (125-C) B 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Oceanography--Arctic Ocean<br/>Arctic Ocean--Congresses
<br/><br/><label>Dewey Class. No.: </label>551.468