THE TITANIC— 50 YEARS LATER 



No. 8 



U. S. NAVAL OCEANOGRAPHIC OFFICE 



WEEKLY ICE CHARTLET 



NORTH ATLANTIC LANE ROUTES— UNITED STATES 

 In accordance with the North Atlantic Track Agreement, the Oceano- 

 graphic Office advises that Track "B" is effective as follows: 



TRACK "B" I SOUTHERN) 



From April II to June 30, inclusive 



EASTBOUND.-Cross long. 47°00'W., in lat. 40°30'N. 



WESTBOUND.-Cross long. 47°00'W., in lat. 4I°30'N. 



April 20, 1965 



The Weekly Ice Chartlets are issued each Wednes- 

 day during the annual Ice season in the North Atlantic. 

 They are based primarily upon the twice-daily ice infor- 

 mation bulletins issued by the International Ice Ob- 

 servation and Ice Patrol Services. All ice information 

 received during the week (up to 1230 G.M.T. on the date 

 of publication) is included (tor complete text, see reverse 

 side hereof). 



Copies of Weekly Ice Chartlets are available at the 

 U. S. Naval Branch Oceanographic Office in Norfolk and 

 the Offices of the Collector of Customs in Chicago, Port- 



land, Boston, New York, Philadelphia, and Baltimore. 

 Copies may also be obtained from Oceanographic Office 

 Sales Agents in the above ports and from the Office 

 Services Officer, Eisenhower Lock, Massena, New York. 



Radio ice information bulletins are issued twice 

 daily by the Oceanographic Office and are transmitted 

 at 0430 and 1630 G.M.T. by NSS (Navy Radio Wash- 

 ington) on the regular "Hydro" broadcasts. 



A daily ice chartlet, with detailed text, is included 

 in the Daily Memorandum, (East Coast Edition). 



KEY TO SYMBOLS 



Eslimaled ice limits Apr 20lh 



Sea ice limits 



A Berg twith date sifihted) 



A Growler (with date sighted) 



O Radar target (with date sighted) 



NOTICE 



Each issue of the Weekly Ice Chartlet 



supersedes all previous issues. 



Published by the U. S. Naval Oceanographic Ollice, Washmglon, D. C. March 1965 

 under the aulhonly ol the SECRETARY OF THE NAVY 



^ 0. Misc. n,845-B 



38 



