It comes standard with a built-in worldwide marine basemap and accepts
MapSource® BlueChart®
offshore marine cartography—featuring detailed depth contours, inter-tidal
zones, wrecks, navaids, and many other points of interest. For fresh-water
anglers, the GPSMAP 178C Sounder is compatible with MapSource Recreational Lakes
with Fishing Hot Spots—featuring fishing areas, boat ramps, marinas, and
hazards for hundreds of popular U.S. and Canadian lakes. Pre-programmed data
cards can be easily inserted into the slot on the front of the unit.
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320 x 320-pixel, 256-color CSTN screen with adjustable CCFL backlight
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3.2" W x 3.2" H (4.5" diagonal) viewing area
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6.3" x 4.9" x 3.7" (W x H x D) unit dimensions
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State-of-the-art 200 MHz processor makes data acquisition, panning, and
zooming virtually instantaneous
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Choose either a dual-frequency 50/200 kHz transducer for offshore boating
or a single-frequency 200 kHz transducer for inland lakes and bays
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See-Thru® technology (which separates fish from thermoclines and
structure) and Depth Control Gain (DCG®) for detailed images of structure
and bottom densities
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New digital display technology offers an easy-to-read, semi-transparent
digital readout that allows users to see sonar images "behind" the
data
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User waypoints are automatically tagged with the date and time of
creation, as well as water temperature and depth—vital information for
serious anglers
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10,000 active track points and 700 saved track points; database
information can be stored on removable data cards and transferred to a PC or
another unit
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Sends, receives, and displays positioning data with DSC equipped VHF
radios
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TracBack™ mode helps guide you back to points along a route
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Tracklines can be color-coded for trolling or cruising applications
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500-watt (RMS) 4000-watt (PTP) output with dual-frequency transducer
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400-watt (RMS) 3200-watt (PTP) output with single-frequency transducer
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Adjustable range, gain, zoom, and bottom lock
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Temperature log maintains a graphical record of temperature data
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Shallow-water, deep-water, fish-by-size, timer, low-battery-voltage,
anchor-drag, arrival, off-course, proximity-waypoint, and clock alarms
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Water temperature and fish ID with depth alarms
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Full specifications below
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Accessories are
listed below.
Waypoints/icons: 3000 waypoints
with name and graphic symbol, 10 nearest (automatic), 10 proximity
Routes: 50 reversible routes
with up to 50 points each, plus MOB and TracBack® modes
Tracks: 10,000 point automatic
track log; 15 saved tracks (up to 700 track points each) let you retrace your
path in both directions
Trip computer: Trip odometer,
stopped time, moving average, moving time, total average, total time, maximum
speed, and odometer
Alarms: Anchor drag, arrival,
off-course, proximity waypoint, and clock
Tables: Built-in celestial
tables for sun and moon by date and position
Tides: Tide data (U.S.A. only)
Map datums: More than 106 with
user datum
Position format: Lat/Lon, UTM/UPS,
Maidenhead, MGRS, Loran TDs, and other grids
Receiver: WAAS enabled, 12
parallel channel GPS receiver continuously tracks and uses up to 12 satellites
to compute and update your position
Acquisition times:
Warm: Approximately 15 seconds
Cold: Approximately 45 seconds
AutoLocate™: Approximately 5
minutes
Update rate: 1/second,
continuous
GPS accuracy:
Position: < 15 meters,(49
feet) 95% typical*
Velocity: 0.05 meter/sec
steady state
Dynamics: 6 g’s
Interfaces: NMEA 0183 (2
inputs), RTCM 104 DGPS corrections and outputs
Antenna: Internal
QuadHelix;
External (GA 29 remote marine mount with 30’ cable)
Differential: WAAS enabled USCG,
RTCM-104 (Requires the purchase of optional beacon receiver)
Basemap: Built-in Worldwide
Marine basemap to 32 nm with coastlines, rivers, lakes, political
boundaries, tide data for the U.S., cities, interstates, U.S. state highways,
and major thoroughfares
Uploadable maps: Accepts
pre-programmed or user programmed Garmin data cartridges containing detailed
BlueChart® marine cartography
Plotting scales: 20 feet to 800
nm with dedicated pushbutton zoom control
Power Source: 1.2 A from 12 vDC
Size: 4.9” H x 6.3” W x 3.7” D (122.5 x
157.5 x 92.5 mm)
Weight:
Display: 3.2" W x 3.2" H color CSTN
with adjustable backlighting (320 x 320 pixels)
Case: Fully gasketed, high-impact plastic
alloy, waterproof to IEC 529 IPX7 standards
Temperature range: 5º F to 158º F (-15º C
to 70º C)
User data storage: Indefinite, no memory
battery required
Sonar:
Frequency: 50/200 kHz
Transmit power: 500 watts (RMS), 4000 watts
(peak-to- peak) w/ dual frequency transducer 400 watts (RMS), 3200 watts
(peak-to- peak) w/ single frequency transducer
Display Options: Depth Control Gain (DCG®)
for detailed bottom and structure views; adjustable range, gain and zoom;
3-level fish ID; graphic whiteline provides clear image of bottom hardness and
structure; See-Thru® technology separates fish returns from thermoclines and
structure
Alarms: Shallow water, fish by size, anchor
drift, timer, temperature, and low battery voltage
Transducers: Choice of single- or
dual-frequency transom-mount transducers. Also available without transducer.
