Garmin GPSMAP 421S Chart Plotter/Fishfinder Combo
Posted on : 11-03-2010 | By : Jerry | In : Marine Electronics
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Marine electronics as a category covers a broad selection: communications equipment, weather equipment, and entertainment equipment are just a few. While shopping for electronics to equip your vessel may not be as exciting as buying the boat itself, it’s definitely a close second.
A GPS plotter is one thing you also want to be sure you have. You will find when you are looking at marine electronics that a lot of the GPS and fish finders are combined into multifunction devices to make your boating experience easier and more fun. Many of these devices will have screens big enough for you to see everything all at once, and are very convenient.
Fish finders and depth sounders are a great tool to use with your GPS if you need to get back to shore quickly and safely when the waters turn rough.
GPSMAP 421S Chart Plotter/Fishfinder Combo – Without Transducer
Features an ultra-bright 4″ QVGA display along with an improved high-speed digital design for faster map drawing and panning speeds. Plus, these waterproof units have a high-sensitivity internal GPS receiver, so mariners will always know their position at sea.
They are ready to go with a built-in, satellite-enhanced worldwide basemap and Garmin’s proven easy-t0-use interface designed to help you navigate the open waters with ease. Both models are compatible with various NMEA 2000 components, inculuding Garmin’s full lineup of NMEA 2000 marine sensors and autopilots.
Features and Specifications:
- Ultra-bright 4″ diagonal QVGA display, 240 x 320 pixels – over 800 nits of brightness
- NMEA 2000 certified for seamless integration with the Garmin marine lineup
- Preloaded worldwide marine basemap
- Compatible with GXM 51 for XM Satellite Radio and XM WX Satellite Weather
- High-speed processor for fast screen redraws and smooth panning
- Streamlined user interface makes it simple to select modes and features
- Single SD memory card slot for BlueChart g2 Vision cards, as well as saving waypoints, routes and tracks to a SD card
- Optional BlueChart g2 Vision cards provide marine chart detail and enhanced navigation features like Auto Guidance, satellite imagery, 3-D Mariner’s Eye View and 3-D Fish Eye View
- Backlit keypad for easy operation in low light conditions
- Unit dimensions: 5.0″H x 5.7″W x 2.7″D (12.7cm H x 14.5cm W x 6.9cm D)
- Power output: 500 watts (RMS) 4000 watts (peak to peak), dual frequency
- Depth: 1500 feet/500 meters (dual frequency)
- Use a dual frequency transducer 50 kHz (45 degrees), 200 kHz (10 degrees) for maximum saltwater performance
- Patented transom/trolling mount transducer
- UltraScroll high rep rate sonar provides lightning-fast screen updates
- AutoGain technology enhances target visibility
- See-Thru technology: shows weak and strong returns simultaneously
- Water temperature log graphically records water temp data
- A-scope
- Whiteline
- Adjustable depth line helps gauge desired fishing levels and bottom clearance
- Split zoom display offers a closer look at fish targets and bottom structure
- 2X, 4X, and bottomlock zoom
- Adjustable keel offset
- Alarms for fish size, shallow water, deep water, and low battery.
One common mistake many boaters make is to wait until a few weeks before the start of the boating season before getting into the launch process. You may not be able to start on certain cleaning and maintenance chores while there’s still snow on the ground, but you can formulate a plan and assemble the various supplies and tools needed.
Early is also the best time to schedule service work, because many service and repair businesses get swamped at the beginning of the season, and boaters who haven’t made appointments, or taken care of tasks early, may end up delaying their launch.
Create a list that includes specifics such as quantity, brand, sizes, part numbers and so forth, then start shopping or ordering. As items arrive, you can group and stage them for easy access, which will ultimately speed up the outfitting process once you get to the boatyard.
One particular useful article on getting your boat ready that is helpful is at boatsus.com. Head for the Resources and Reference section and you’ll find an extensive collection of articles dealing with all aspects of operation and maintenance. boatus.com/boattech/SpringPrep2006.pdf.)
WaterStates Trading Company specializes in LOW prices on QUALITY water sports, boating and fishing and camping supplies. We offer communication, safety, navigation and entertainment electronics for your boating or camping experience.
You can choose between all leading brands, such as Pelican, Garmin and Minn Kota. Compare prices and buy directly from us. Choose among our wide selection of marine fish finders, VHF marine radios, GPS, boating accessories, tubes and towables, camping, hunting, fishing equipment and more.
Ordering with us is fast and easy. Water Fun at discount prices and superior customer service is our trademark. Top Brands! Great Prices!



Today we will look at 5 essential tips to catching muskies that have been proven very successful.
WaterStates Trading Company specializes in LOW prices on QUALITY water sports, boating and fishing and camping supplies. We offer
This one basic premise will improve your fish catching ability and will set you apart from the fishing novices. How do you think the fishing pros are able to consistently catch fish when other fishermen do nothing but drown their bait?