On her arrival, requests were made for improved electrical, heating, and communications gear and installation of a fathometer, radar, and keel-mounted sonar.
22.
The report found that the ship's fathometer, which measures water depth, was broken, as well as both radar repeaters on the cruiser's bridge.
23.
With the advent of large LCD arrays, the high power requirements of a CRT gave way to the LCD in the early 1990s and fishfinding fathometers reached the sporting markets.
24.
Navigating equipment included Sperry gyrocompass and autopilot, radio range finder and a fathometer . " Velero III " carried two steel motor whaleboats and two wooden fishing and shore boats.
25.
Overhaul followed her 11 November arrival; and, from 21 & ndash; 25 December, she tested newly installed equipment : a fathometer, radar, and keel-mounted sound gear.
26.
An alternative to the fathometer was devised involving the use of the ship's active forward search sonar in conjunction with the gravity meter installed in the combat intelligence center ( CIC ).
27.
By using both systems in tandem, underwater masses could be detected and avoided, although this approach lacked the capability of the fathometer to echo-sound the depth of the ocean floor.
28.
Early in the patrol, she was hampered by the failure of her fathometer; and, throughout the mission, she was plagued by periscope fogging and overcast weather which ruled out celestial navigation.
29.
Hampered by fog, rain, and poor radio reception-and lacking radar, fathometer, and deciphering equipment-" S-18 " remained on patrol through 10 June 1942.
30.
Today, sporting fishfinders lack only the permanent record of the big ship navigational fathometer, and that is available in high end units that can use the ubiquitous computer to store that record as well.
