GUNNAR ISACHSEN. M.-N. Kl. 



The Charts of Fairways and Anchorages 



worked up by the Isachsen Expedition are as follows: 



1. Forland Sundet — KingsBay — Cross Bay; scale i : 200 ooo. 



2. Bio m strand Hamn; 1:25000. 



3. Ferrier Hamn; 1:25000. 



4. Farm Hamn; 1:25000. 



5. Vulkan Hamn; 1:25000 



6. Gjjeen Harbour; 1:100000. 



7. Hecla Hamn and Finnes Hamn, in Green Harbour ; 1:25000. 



8. Norske Ham na on Bear Island; 1:25000. 



These, together with the General Chart worked up by Captain 

 Isachsen, will be found on the large chart-sheet at the end of the paper; 

 and facing p. 25 of the letterpress is PI. I, giving 



Wood Bay — Liefde Bay — Bock Bay; i: 400 000. 



Explanation of the Charts, 



Depths and heights are given in metres. 



All hydrographie figures are based upon spring-tide low-water. The 

 greatest difference between high and low water is about 1^/2 metre. The 

 harbour time is about i hour. The hydrographie details concerning Cross 

 Bay and its harbours are taken from the Prince of Monaco's charts of 

 1906 and 1907; those concerning Zeppelin Harbour in Kings Ba}' from 

 the Reichs-Marine-Amt chart of Barents Sea, corrected to 191 1. 



The variation in the compasses placed upon the charts is taken from 

 the Reichs-Marine-Amt chart corrected to 191 1. 



It should be observed that this differs from that observed during Isach- 

 sen's expedition. According to these observations, ^ the mean variation at 

 the east end of the base-line on Forland Sletta (Foreland Plain), on June 

 30 and July 16, 1910, was 12.6^ W, in Virgo Bay, on August 21, 1910, 

 13.5" W, and at Sabine Point, on August 22, 1910, 13.2"^ W. 



According to the above-mentioned Reichs-Marine-Amt chart, the an- 

 nual decrease in the variation is about 14'. 



Aust, est (O.) = east. Bugt = bay. 



Boe = sunken rock. Drivis -= drift ice. 



Bredde (Br.) = latitude. Elv = river. 



Bræ ^ glacier. Fjeld (fj) = mountain, (Mt.) 



1 Observations Astronomiques faites par l'Expédition Isachsen et calculées par Anton- 

 Alexander, 1. c, p. 15. 



