Garmin GPSMAP 172 Sounder, GPSMAP 178C, GPSMAP 172C, GPSMAP 178 Specifications

GPSMAP®172/172C and 178/178C

Brilliant color or value-priced grayscale.

Either choice leads to great navigation

performance with Garmin’s newest GPS

chartplotters: the GPSMAP

®

172/172C

and GPSMAP

®

178/178C Sounder. These

rugged, waterproof, fixed-mount units

pack a boatload of wayfaring features

into sleek, space-saving formats. Bright,

sunlight-readable 4.5-inch LCD screens

offer outstanding clarity and detail –

while 200-MHz processors ensure

lightning-quick panning, zoom and map

redraw rates. The Sounder version

GPSMAP 178/178C adds powerful sonar

capabilities to the mix, leaving fish

nowhere to hide. And preprogrammed

or user-programmed data cartridges can

be used to enhance the plotters’ built-in

basemaps with detailed BlueChart

®

marine cartography.

Chart your course with GPS to navigate with confidence.

©

2004

Garmin Ltd. or its subsidiaries

Garmin International, Inc.
1200 East 151st Street
Olathe, Kansas 66062, U.S.A.
913/397.8200 fax [phone]

Garmin (Europe) Ltd.
Unit 5, The Quadrangle
Abbey Park Industrial Estate
Romsey, SO51 9DL, U.K.
44/1794.519944 fax [phone]

Garmin Corporation
No. 68, Jangshu 2nd Rd.
Shijr, Taipei County, Taiwan
886/2.2642.9199 fax [phone]

www.garmin.com

Specifications are preliminary and subject to change
without notice.

Navigation features

Waypoints/icons: 3,000 waypoints with name, symbol,

depth and water symbols, 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, 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 including user datum

Position format: Lat/Lon, UTM/UPS, Maidenhead, MGRS,

Loran TDs and other grids

DSC Support: Yes

GPS performance

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

Interfaces: NMEA 0183 (2 inputs), RTCM 104 DGPS

corrections and outputs

Antenna: Choice of

Internal or External QuadHelix
(GA 29 remote marine mount
with 30’ cable)

Plotter/moving map features

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 preprogrammed or

user-programmed Garmin data cards
containing optional MapSource
cartography

Plotting scales: 20 feet to 800 nm with dedicated

push-button zoom control

Power

Source: 10-35 vDC

Usage: GPSMAP 172C/172 = 6 watts

GPSMAP 178C/178 sounder = 14 watts

Physical

Size: 4.9”H x 6.3”W x 2.8”D

(122.5 x 157.5 x 71 mm)

Weight: 172C/172 = 1 lb. 1 oz.

178C/178 = 1 lb. 3.5 oz.

Display: 3.2" W x 3.2" H, 320 x 320 pixels

with adjustable CCFL backlighting
172C/178C = 256 color CSTN
172/178 = 10-level FSTN

Case: Fully gasketed, high impact plastic alloy,

waterproof to IEC 60529 IPX7 standards

Temperature range: 5ºF to 131ºF (-15ºC to 50ºC)

User data storage: Internal backup of user settings,

no memory battery required

Accessories

Standard: Chartplotting receiver

Remote antenna with 30’ cable
or internal antenna
Power/data cable
User’s manual
Single-knob tilt & swivel bracket
Quick start guide
Unit cover
Various transducers (178/178C only)

Optional: Compatible with most Garmin

MapSource

®

products, including
Recreational Lakes with Fishing Hot
Spots®, BlueChart®, Recreational Lakes
with Fishing Hot Spots®, Topo. (Garmin
data cartridges required)

GPSMAP 172/172C chartplotter is
compatible with optional GSD 20 remote
module to add full Sounder capabilities

Depth Sounder features (GPSMAP 178/178C Sounder only)

Frequency: 50/200 kHz or 200 kHz

Transmit power: 500 watts (RMS), 4000 watts (peak-to-

peak) w/ dual frequency transducer

400 watts (RMS), 3200 watts (peak-to­peak) w/ single frequency transducer

Performance features: 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

Map Page

Data cartridges provide optional MapSource

data for enhanced map detail

Navigation page

Shows distance, speed and direction to

waypoint, helping you stay on course

Big Numbers Option

Enlarge size of data fields to make them

readable from a distance

GPSMAP®172/172C and 178/178C

1104 M01-10157-00

compatible