INTRODUCTION 



10.2-kc/s 



measurements in 

 port analyzed 



Although still developmental and not in continuous 

 operation, the Omega navigation system is frequently in de- 

 mand for special operations. Such an operation was the 

 Project NAVADO oceanographic survey of the North Atlantic, 

 Installation of an Omega receiver on HMS VIDAL was made 

 in the fall of 1963, Subsequently the receiver was transferred 

 to HR. MS. SNELLIUS and remained onboard until August 

 1965, 



This report analyzes 10.2-kc/s signals received by 

 the survey ships in 24 ports of call. 



INSTALLATION OF EQUIPMENT 



Installed on 

 VIDAL, October 

 1963 



Transferred 

 to SNELLIUS, 

 October 1964 



The installation of HMS VIDAL was made at the re- 

 quest of the Bureau of Ships (Code 362A), Routine installa- 

 tion was accomplished at Portland Dockyard, Portland, 

 England, in October 1963 with the assistance of a represent- 

 ative of the U, S. Navy Electronics Laboratory, The field 

 engineer also accompanied the ship for a period sufficient 

 to provide necessary assistance in operation and training. 



Survey assignments within Project NAVADO were 

 changed in fall of 1964 with the VIDAL being reassigned to 

 resurvey the first four lines. The Dutch ship HR. MS. 

 SNELLIUS continued the northern survey lines in the 

 Atlantic. Because of the change in assignment and at the 

 request of the Hydrographer, Royal Netherlands Navy, the 

 Omega receiver was transferred from the VIDAL to the 



