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Back-up memory:..........Built-in memory stores sonar records for
decades.
Languages:......................10; menu languages selectable by user.
Sonar
Frequency:......................50/200 kHz for SeaFinder 480DF; 200 kHz
for FishMark 480.
Transducers:..................A dual-frequency Skimmer
transducer with
built-in temperature sensor is packed with
the SeaFinder 480DF. It has 35°/12° cone
angles. A single-frequency Skimmer
transducer with built-in temperature sensor
is packed with the FishMark 480. It has a
20° cone angle. Transducers operate at
speeds up to 70 mph (61 kts)
Watts:...............................1,500 watts peak-to-peak/188 watt RMS.
Sonar sounding
depth capability:...........SeaFinder 480DF: 1,500 feet (450 meters).
FishMark 480: 800 feet (244 meters).
Actual capability depends on transducer
configuration and installation, bottom
composition and water conditions. All sonar
units typically read deeper in fresh water
than in salt water.
Depth display:................Continuous display .
Audible alarms: .............Deep/shallow/fish/zone.
Automatic ranging:.......Yes, with instant screen updates.
Auto bottom track:........Yes.
Zoom bottom track:......Yes.
Split-screen zoom:.........Yes.
Surface water temp:.....Yes.
