RECEPTION QUALITY IN SAMPLE GROUP 



BEST 



GOOD 



FAIR 



READABLE 



POOR 



21 



23 



21 



Table 1. Quality of fax charts returned within the analysis region. 



The data weie also examined to determine the most popular frequencies. Tlic results 

 indicated the preferred frequency was 12750 MHz with 53% of the population (Table 2). This is 

 the highest frequency at which the International Ice Patrol broadcasts its fax chart. The 13882.5 

 MHz chart is broadcast from Germany by the German Ice Service, and therefore would be 

 expected to cairy the farthest. It should be noted that other agencies also broadcast this product at 

 high HE frequencies as well. It is noteworthy that, in general (83% of the charts), three major 

 frequencies are used by the mariner: 91 10 MHz, 12750 MHz, & 13822.5 MHz (Table 2). 



Figure two shows the geographical distribution of the returned fax charts. The 13822.5 

 MHz frequency is the long HE fax chart broadcast from Germany, and was found principally on 

 the eastern edge of the study area. The 9110 MHz frequency distribution showed that it was 

 mainly copied West of 47°W since it is a lower HE frequency transmission. Finally, the 12750 

 MHz frequency was evenly distributed throughout the rest of the study area. 



Table 2. Percentage of fax charts returned within the analysis region broken down by frequencies. 



53 



