. Electronic navigational aids; loran, radiobeacon, and radarbeacon systems and loran, radio-direction-finder, and radar ship equipment . Figure 1-12.—Loran station—men on watch at the timing equipment. receiver unit each time the local transmitter sends out a signal. It is neces- sary to do this to prevent the receiver from being damaged by the strong signal that is generated in the vicinity of the station's own transmitting antenna. During the interval when the local transmitter is not sending out a signal, the "attenuator" reconnects the receiver to permit the operator to receive
. Electronic navigational aids; loran, radiobeacon, and radarbeacon systems and loran, radio-direction-finder, and radar ship equipment . Figure 1-12.—Loran station—men on watch at the timing equipment. receiver unit each time the local transmitter sends out a signal. It is neces- sary to do this to prevent the receiver from being damaged by the strong signal that is generated in the vicinity of the station's own transmitting antenna. During the interval when the local transmitter is not sending out a signal, the "attenuator" reconnects the receiver to permit the operator to receive the signal from the distant station. In order to provide reliable Loran service even in the case of minor failures of equipment it is the established practice in equipping Loran stations to provide duplicate units of all of the major items. In this manner an equip- ment failure causes only a momentary pause in the service, since the stand-by equipment can usually be placed in service in less than a minute's time. Figures 1-10, 1-11, and 1-12 illustrate transmitting station equipment and installation layout plan. LORAN SYSTEM DESCRIPTION (Note.—The technical aspects of the Loran system are described in this section for purposes of completeness, to be used for the information of persons who may have occasion to study Loran in some detail. The material pre-
Size: 2441px × 2048px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookpublisherwashingtonusgovtprintoff
