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Overview: The Garmin echoMAP 70s is a combination chartplotter and
fishfinder. It has detailed maps of US lakes, plus dual microSD slots for adding more
specialized and detailed charts and maps that are available from Garmin. The
echoMAP 70s has a 7" (diagonal) full color display, and can be
mounted in a variety of ways. The fishfinder has a 500-watt, dual-frequency
sonar transducer that lets you search for fish to a maximum depth of 1900 feet
in fresh water or 700 feet in salt water.
Display: The echoMAP 70s has a 6" (wide) x 3.6" (high),
7" diagonal full
color WVGA display with 800 x 480 pixels. It has a variable backlight adjustment
(automatic or manual), with day and night color schemes that change
automatically or you can set manually. The display features multi-touch
touchscreen technology, similar to those found on smartphones and tablets. You
can drag or swipe your finger across the screen to pan or scroll. To zoom, you
can touch the screen with two fingers and spread them apart (zoom in) or pinch
them together (zoom out).
GPS/GLONASS: The echoMAP 70s has a built-in GPS receiver that collects
data from overhead satellites to establish your current location. The GPS signal
strength is indicated on the top of the screen in a bar graph (5 bars maximum).
The device is equipped with a 10Hz GPS/GLONASS receiver which refreshes its
position and heading up to 10 times per second. In addition, the unit
coordinates the timing of the sonar return in relation to the boat's
position to give you amazingly accurate waypoints or for pinpointing fishing
Charts and Maps: The unit includes LakeVü HD Ultra mapping, which covers over 17,000 lakes across the United States, with over 400 with 1-foot contours. It also has a basic imagery map of the world (WorldWide Shaded Relief Map 8.00). Garmin BlueChart g2 Coastal maps are available on microSD cards. Charts of
Canada's inland lakes are also available for purchase.
Wireless Connectivity: The echoMAP 70s has wireless
connectivity capability, allowing you to connect and access marine-specific apps
via your iPhone or iPad. You can configure the unit as a Wi-Fi hotspot and
communicate with your device.
HD-ID Sonar: Garmin's exclusive HD-ID target tracking technology provides
enhanced separation and definition of the images on the screen. It shows
exceptional structure detail and clear bottom contours. The unit shows suspended targets as sonar "arches"
or as fish symbols with (or without) depth information.
Transducer: The dual-frequency (200 kHz/77 kHz) transducer transmits sound
waves through the water and receives them to relay information to the display.
The 200 kHz frequency shows better detail, has a narrower beam (60°) and is
typically used in shallower waters. The 77 kHz frequency penetrates deep water
more effectively, and has a wider beam (120°), so it can be used to cover a
larger area. The transducer has an attached 30' cable to accommodate
large or small boats. The transducer can be mounted either to the transom of the
boat, or to the bottom of your trolling motor. Mounting hardware for both
locations is included.
Viewing Pages: The echoMAP 70s' sonar display scrolls from right to
left to show the sonar readings from the transducer. The bottom depth is
displayed in large numerals, along with the water temperature, and water speed.
The unit has an adjustable depth range (Auto or manual 5' to 5000'), and the
depth scale is shown at the bottom of the screen, along with the transducer
frequency. You can choose from a full screen page or split pages:
- Full Screen Page: The Full Screen page shows a
full-view graph of the sonar readings from the transducer.
- Split Zoom Page: The Split Zoom page shows a full-view
graph of the sonar readings on the right side of the screen, and a magnified
portion of that graph on the left side.
- Split Frequency Page: The Split Frequency page shows
the 77 kHz frequency sonar data, while the right side shows the 200 kHz
frequency sonar data.
A-Scope: The A-Scope is a vertical flasher along the right
side of the Full Screen page that shows the range to targets in real time along
a scale. This view expands the most recently received sonar data so that it is
easier to see. It can also be helpful in detecting fish that are located close
to the bottom.
Sonar Alarms: The echoMAP 70s lets you set up alarms for
different situations that may occur:
- Shallow Water: The unit will alarm when the water depth is shallower
that the set value.
- Deep Water: The unit will alarm when the water depth is
deeper than the set value.
- Water Temperature: The unit will alarm when the water
temperature varies more than +/- 2°F.