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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 500CDF; 200 kHz
for FishMark 500C.
Transducers: .................. A dual-frequency Skimmer
transducer with
built-in temperature sensor is packed with
the SeaFinder 500CDF. It has 35°/12° cone
angles. A single-frequency Skimmer trans-
ducer with built-in temperature sensor is
packed with the FishMark 500C. 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 500CDF: 1,500 feet (450 me-
ters). FishMark 500C: 800 feet (244 me-
ters).
Actual capability depends on transducer con-
figuration and installation, bottom composi-
tion 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.