. Electronic navigational aids; loran, radiobeacon, and radarbeacon systems and loran, radio-direction-finder, and radar ship equipment. Loran; Radar. OCEAN ELECTRONIC NAVIGATIONAL AIDS 49. Figure -PPI picture showing sea return when no anticlutter or sea return suppression devices are in use (special 3 cm. Radar). Other factors which more or less impose limitations on Radar are tabulated and briefly discussed below: (1) Objects cannot be readily identified unless additional electronic devices (Radar aids) are used in conjunction with the Radar itself. Identification, however, can quite
. Electronic navigational aids; loran, radiobeacon, and radarbeacon systems and loran, radio-direction-finder, and radar ship equipment. Loran; Radar. OCEAN ELECTRONIC NAVIGATIONAL AIDS 49. Figure -PPI picture showing sea return when no anticlutter or sea return suppression devices are in use (special 3 cm. Radar). Other factors which more or less impose limitations on Radar are tabulated and briefly discussed below: (1) Objects cannot be readily identified unless additional electronic devices (Radar aids) are used in conjunction with the Radar itself. Identification, however, can quite often be accomplished by impli- cation such as movement, relation to other objects, shape (coast- line) , and sometimes initial range of detection. (2) Radar chart presentation on the scope requires interpretation due to line-of-sight characteristics which give shadow effects. In other words, larger intervening objects may blank out objects behind them. (3) Radar can be used reliably for only slightly over line-of-sight Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Coast Guard. Washington, U. S. Govt. Print. Off.
Size: 1380px × 1810px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookpublisherwashingtonusgovtprintoff
