18 



OCEAN ELECTRONIC NAVIGATIONAL AIDS 



Figure 1-14.- 



-Loian-eriuipped trawler Deep Sea uses Loran as a primary aid to navigation 

 in tlie Bering Sea. 



NEW DEVELOPMENTS IN STANDARD LORAN EQUIPMENT 



The postwar period up to the present time has produced Loran equip- 

 ment, both for shipboard and transmitting stations, which is designed with 

 emphasis on commercial Loran requirements. Manufacturers of electronic 

 equipment have brought forth a number of excellent Loran receiver- 

 indicators designed for installation and use on vessels ranging all the way 

 from passenger liners to fishing craft. The equipment incorporates all 

 modern circuit achievement, and is particularly useful to seagoing people 

 who have little technical knowledge of electronic gear. All commercial ship- 

 board Loran equipment is readily available in the electronic equipment trade 

 channels. 



In keeping with the pace set by the manufacturers of Loran receiving 

 equipment, great progress has been made in Loran transmitter design. The 

 United States Coast Guard has procured and installed new transmitters 

 which, by decreased bandwidth, have reduced possible interference to other 

 services and are capable of transmitting signals of greater power. This will 

 result in improved service to the commercial user of the Loran system. 



USER TRENDS OF THE LORAN SYSTEM 



The installation of Loran equipment on private shipping vessels is going 

 ahead rapidly. This is especially true with regard to Loran installations 

 aboard fishing craft. The adoption of Loran by fishermen to locate exact 

 fishing ground positions on the various banks has resulted in shorter and 

 more profitable trips. 



Loran is used by the majority of aircraft flying the various oceans. Most 

 transoceanic airlines have found Loran to be an excellent and proven aid to 

 navigation system. The ease and rapidity of obtaining Loran lines of position 

 or fixes is particularly useful in air navigation. 



