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It's important to us and our power users, but if you don't care how many
watts of power the unit has or how many waypoints it can store, skip
ahead to important information on how sonar works on page 5. Back-
ground on GPS begins on page 6.
Capabilities and Specifications:
General
Display:............................ 5.0" (12.7 cm) diagonal 256-color enhanced
TFT LCD; programmable to viewing prefer-
ence.
Resolution:...................... 640 pixel x 480 pixel resolution; 307,200 total
pixels.
Backlighting................... Backlit screen and keypad with multiple
lighting levels for night use.
Input power.................... 10 to 15 volts DC.
Case size:......................... 5.4" H x 6.9" W x 3.4" D (13.8 x 17.6 x 8.6
cm); sealed and waterproof; suitable for
saltwater use.
Back-up memory:.......... Built-in memory stores sonar records for
decades.
Languages.......................10; menu languages selectable by user.
MMC slots: ...................... One with waterproof door (SD card
compatible).
Sonar
Frequency....................... 50/200 kHz for SeaCharter 640cDF; 200 kHz
for FishElite 640c.
Recording:........................MMC & SD cards for recording sonar chart
logs.
Transducers: .................. A dual-frequency Skimmer
transducer with
built-in temperature sensor is packed with
the SeaCharter 640cDF. It has 35°/12° cone
angles. A single-frequency Skimmer trans-
ducer with built-in temperature sensor is
packed with the FishElite 640c. It has a 20°
cone angle. Transducers operate at speeds up
to 70 mph (61 kts)
Watts: ............................... SeaCharter 640cDF: 4,000 watts peak-to-
peak/500watts RMS. FishElite 640c: 1,500
watts peak-to-peak/188 watt RMS.