Furthermore, all you need to do to integrate high quality maps and navigational data for any lake in your region is load up a microSD card with Humminbird’s Lake Master, Auto Chart, Auto Chart Pro and Navionics software suites and pop it right into the integrated SD card slot. Hummingbird’s unique software packages take the guesswork out of knowing where to fish and how deep the fish are currently swimming so you can better decide how to go about landing that trophy catch of a lifetime.
Fish finders were derived from fathometers, active sonar instruments used for navigation and safety to determine the depth of water.[1] The fathom is a unit of water depth, from which the instrument gets its name. The fathometer is an echo sounding system for measurement of water depth. A fathometer will display water depth and can make an automatic permanent record of measurements. Since both fathometers and fishfinders work the same way, and use similar frequencies and can detect both the bottom and fish, the instruments have merged.[2]
Referred to as a fishfinder, graph, sounder or recreational sonar, these products provide anglers with the ability to locate and target open-water baitfish, game fish and cover. This underwater-viewing advantage helped launch sportfishing markets like never before, as anglers were able to better understand depth contours, bottom composition and structure location, plus how fish related to this environment.
Fishing nets are meshes usually formed by knotting a relatively thin thread. Between 177 and 180 the Greek author Oppian wrote the Halieutica, a didactic poem about fishing. He described various means of fishing including the use of nets cast from boats, scoop nets held open by a hoop, and various traps "which work while their masters sleep". Ancient fishing nets used threads made from leaves, plant stalk and cocoon silk. They could be rough in design and material but some designs were amazingly close to designs we use today (Parker 2002). Modern nets are usually made of artificial polyamides like nylon, although nets of organic polyamides such as wool or silk thread were common until recently and are still used.

The power of a fishfinder—the strength of the “ping”—is expressed in watts RMS (root mean squared). Power is directly related to how well you see in silt-laden water, view down to greater depths, and successfully resolve separate targets and bottom structure. A 500-watt (RMS) fishfinder should have plenty of power for most coastal applications. Serious bluewater anglers should look for 1,000 watts or more. Inland lake fishermen can see the shallow bottom with only 200 watts.
Fishing nets are meshes usually formed by knotting a relatively thin thread. Between 177 and 180 the Greek author Oppian wrote the Halieutica, a didactic poem about fishing. He described various means of fishing including the use of nets cast from boats, scoop nets held open by a hoop, and various traps "which work while their masters sleep". Ancient fishing nets used threads made from leaves, plant stalk and cocoon silk. They could be rough in design and material but some designs were amazingly close to designs we use today (Parker 2002). Modern nets are usually made of artificial polyamides like nylon, although nets of organic polyamides such as wool or silk thread were common until recently and are still used.
Transmit Power: Transmit power is expressed in watts RMS (root mean squared) and is related to how well you see in silt-laden water, view down to greater depths and successfully resolve separate targets and bottom structure. A 500-watt (RMS) fishfinder should have plenty of power for most coastal applications. Serious bluewater anglers should look for 1,000 watts or more. Inland lake fishermen can see the shallow bottom with only 200 watts.
The size of the area you’re scanning will be affected by the angle of the cone. A wide beam cone scans between 40°-60°, meaning you’ll be covering a large area. A narrow cone will scan between 10°-20°. So make sure you’re aware of whether your fish finder is using a wide or narrow cone when you’re looking at the data on your screen. The Deeper PRO and PRO+ have wide and narrow beam scanning (55° and 15°), the Deeper START has a medium/wide beam (40°). One other point to remember about how you sonar works is that it is constantly sending and receiving data, which means your display will be continually scrolling. The current scanning data will be on the right – the further left on the screen, the older the data.
The most common mistake anglers make when reading their fish finder is thinking that a long arch means a big fish. This is not the case. On your sonar display, you should think of length as representing time. For example, imagine you keep your fish finder stationary in the water (in other words you are not reeling or trolling it). If there is a fish underneath that is also stationary, what will you see on your fish finder display? You will see one continuous line. That doesn’t mean there’s a blue whale stranded in the pond you’re fishing. It means there is a stationary fish under your fish finder, and it might be a very small one.

Our Depth Sounders are designed to mount flush in the dash of your boat. Our friendly user interface, automatic range & sensitivity and proprietary algorithms produce precise readings at speeds in excess of 60 MPH. Say goodbye to the days of not knowing the depth while running your boat on plane. Our Hand Held Depth Finders takes portable sonar systems to a whole new level. Get precise readings on the go with just a press of a button.


The depth scale on the right of the screen enables you to identify the depth of any features you find. The depth reading in the top right of the screen shows you the bottom depth under your fish finder right now – bear in mind this is not necessarily the same depth as the features you have just scanned, especially if you are scanning drop offs or points.

You have been anxiously awaiting the arrival of the weekend so that you can pack up and hit your favorite fishing area. You dream of landing your next big catch, and a fish finder is just what you need to help you locate the ultimate fishing spot. If you love spending time in the great outdoors, then you can find just what you need to get ready for your next adventure. On eBay, you can browse through a large selection of fish finders in both new and refurbished conditions, available from trusted and reliable sellers. The Hummingbird fish finder can easily be attached to any surface on your boat and can aid you in discovering where the fish are hanging out. If you do not enjoy fishing yourself, but are looking for something to get the outdoorsman in your life, a portable fish finder is a perfect gift and sure to bring a smile. Shop easily online, check out convenient shipping options, and reel in an amazing deal on the perfect fish finder.


Spend more time catching fish and less time trying to find where they are hiding with the Helix 7 CHIRP GPS G2 Fish finder. Using side-by-side dual imaging technology, this fish finder not only lets you map structures and schools, but also allows you to view both CHIRP Down Imaging and Switchfire Sonar data at the same time, providing the most complete image of the underwater environment possible. In addition to the large 16-bit display, the Helix 7 also features an integrated GPS that store up to 2500 waypoints and 50 routes so you can mark the coordinates of all the best fishing spots on your favorite lakes and rivers.
The size of the area you’re scanning will be affected by the angle of the cone. A wide beam cone scans between 40°-60°, meaning you’ll be covering a large area. A narrow cone will scan between 10°-20°. So make sure you’re aware of whether your fish finder is using a wide or narrow cone when you’re looking at the data on your screen. The Deeper PRO and PRO+ have wide and narrow beam scanning (55° and 15°), the Deeper START has a medium/wide beam (40°). One other point to remember about how you sonar works is that it is constantly sending and receiving data, which means your display will be continually scrolling. The current scanning data will be on the right – the further left on the screen, the older the data.
Simrad’s GO9 XSE Combination GPS/ Fishfinder offers a networkable 9” Touchscreen unit at an affordable price point. An Internal 10Hz GPS Receiver quickly and accurately locates position on the included C-Map Pro Charting while the included TotalScan Transom Mount Transducer provides detailed underwater images. Compatible with detailed mapping from C-MAP MAX-N, Navionics, Insight, Insight Genesis, and NV Digital Charts.
Lower frequency transducers, with longer waves and fewer waves per second, show less detail (larger fish) but carry more energy and penetrate to greater depths. One sound wave at 50kHz is slightly larger than 1", so a 50kHz sound wave will only detect fish if their air bladders are large, slightly longer than an inch. Lower frequency won’t provide as clear of a picture but will operate effectively in the depths of the ocean or Lake Michigan.
Bright 10” Sunlight Viewable, Touchscreen Display. Garmin’s GPSMAP 7610xsv with 10Hz High Sensitivity GPS Receiver, Preloaded Coastal and Lake Mapping and Wi-Fi is a top choice combination unit for any mariner. New features to the 7610xsv include FLIR Camera Support, Smart Boundaries, and More.HD-ID Sonar, 1kW CHIRP, CHIRP DownVu and CHIRP SideVu built-in. Transducer Required and Sold Separately.

Fish finders are incredibly valuable tools, and the more you learn about how to read them, the more successful your fishing trips will be. A key part of learning as angler is to go from trial and error to a more knowledge-based approach. Maybe you regularly catch at a certain spot with a certain presentation – but do you know why? A fish finder will help you understand not just your failures, but also your successes. And once you know this, you can recreate this success more easily.
Check out our Factory Outlet Store where you can find all of our recertified marine electronics. Items and quantities are limited, so do not hesitate if you find and item you are looking for. Recertified products are restored to like new condition and carry a 90 day warranty, so you know you are getting one heck of a deal. If you have any questions you can always contact our support team via our support ticket system at support.norcrossmarine.com. We are always happy to troubleshoot and answer any questions you may have.
Commercial and naval fathometers of yesteryear used a strip chart recorder where an advancing roll of paper was marked by a stylus to make a permanent copy of the depth, usually with some means of also recording time (Each mark or time 'tic' is proportional to distance traveled) so that the strip charts could be readily compared to navigation charts and maneuvering logs (speed changes). Much of the world's ocean depths have been mapped using such recording strips. Fathometers of this type usually offered multiple (chart advance) speed settings, and sometimes, multiple frequencies as well. (Deep Ocean—Low Frequency carries better, Shallows—high frequency shows smaller structures (like fish, submerged reefs, wrecks, or other bottom composition features of interest.) At high frequency settings, high chart speeds, such fathometers give a picture of the bottom and any intervening large or schooling fish that can be related to position. Fathometers of the constant recording type are still mandated for all large vessels (100+ tons displacement) in restricted waters (i.e. generally, within 15 miles (24 km) of land).
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Referred to as a fishfinder, graph, sounder or recreational sonar, these products provide anglers with the ability to locate and target open-water baitfish, game fish and cover. This underwater-viewing advantage helped launch sportfishing markets like never before, as anglers were able to better understand depth contours, bottom composition and structure location, plus how fish related to this environment.
Spend more time catching fish and less time trying to find where they are hiding with the Helix 7 CHIRP GPS G2 Fish finder. Using side-by-side dual imaging technology, this fish finder not only lets you map structures and schools, but also allows you to view both CHIRP Down Imaging and Switchfire Sonar data at the same time, providing the most complete image of the underwater environment possible. In addition to the large 16-bit display, the Helix 7 also features an integrated GPS that store up to 2500 waypoints and 50 routes so you can mark the coordinates of all the best fishing spots on your favorite lakes and rivers.
Additional information for residents of Quebec only: The regular annual rate for persons applying for the Triangle credit card is 22.99% for cash transactions and related fees and 19.99% for all other charges. Some applicants may receive a higher or lower regular annual rate depending on a credit evaluation. The minimum payment is the sum of (a) interest and fees shown on your statement, (b) the greater of any amount past due or any balance over your credit limit, (c) the amount of any equal payments plan instalments then due, and (d) $10. Balances under $10 are due in full. For residents of Quebec, the period between the statement date and the due date for payment is 26 days. The billing period covered by each statement can be from 28-33 days. The Triangle Mastercard does not have an annual fee. Examples of borrowing costs (rounded to the nearest cent) assuming that all charges are purchases bearing interest at the regular annual rate of 19.99%, a 30 day month, no charges made on special payment plans and no other fees, additional payments or other changes are:
Our Depth Sounders are designed to mount flush in the dash of your boat. Our friendly user interface, automatic range & sensitivity and proprietary algorithms produce precise readings at speeds in excess of 60 MPH. Say goodbye to the days of not knowing the depth while running your boat on plane. Our Hand Held Depth Finders takes portable sonar systems to a whole new level. Get precise readings on the go with just a press of a button.
You have been anxiously awaiting the arrival of the weekend so that you can pack up and hit your favorite fishing area. You dream of landing your next big catch, and a fish finder is just what you need to help you locate the ultimate fishing spot. If you love spending time in the great outdoors, then you can find just what you need to get ready for your next adventure. On eBay, you can browse through a large selection of fish finders in both new and refurbished conditions, available from trusted and reliable sellers. The Hummingbird fish finder can easily be attached to any surface on your boat and can aid you in discovering where the fish are hanging out. If you do not enjoy fishing yourself, but are looking for something to get the outdoorsman in your life, a portable fish finder is a perfect gift and sure to bring a smile. Shop easily online, check out convenient shipping options, and reel in an amazing deal on the perfect fish finder.
For precise detection of structures and fish, our Raymarine radar bundle gives you remarkable resolution. The Garmin Chartplotter radar combo updates your position 10 times per second to accurately maintain your heading. A large screen with an outstanding LED display on our Humminbird fish finder GPS provides images that are easy to read even in bright sunny conditions. You can find the best marine depth finder GPS combo here, and we stand behind all of our products with a 30-day guarantee against defects. Contact our team of experts if you should need any assistance in finding the products you require.
Fully Networkable, 8” Touchscreen Chartplotter and Sonar. Garmin’s GPSMAP 7608xsv includes built in maps for Coastal and Lake mapping, a 10HZ GPS Receiver providing fast acquisition and position tracking. High Performance HD-ID Sonar, 1kW CHIRP, CHIRP DownVu and CHIRP SideVu. Now enjoy FLIR Camera Compatibility, Smart Boundaries and More. Transducer Required and Sold Separately.
1 Based on the level of net new purchases (purchases less credits) that are posted to your Gas Advantage Mastercard account in any monthly billing period, you will be entitled to a discount on each litre of gasoline or diesel fuel that is purchased for a motor vehicle at Canadian Tire Gas Bars during the following monthly billing period and that is charged to your Gas Advantage Mastercard. The discount that you receive in a billing period will be reduced to 2¢ per litre after you have made purchases of more than $500 for gasoline, diesel fuel or any other sundry items at Canadian Tire Gas Bars during that billing period using your Gas Advantage Mastercard. For complete program details please read the Canadian Tire Gas Advantage Mastercard Terms and conditions.
Harpoons are spears which have a barb at the end. Their use was widespread in palaeolithic times.[11] Cosquer cave in Southern France contains cave art over 16,000 years old, including drawings of seals which appear to have been harpooned. Tridents are spears which have three prongs at the business end. They are also called leisters or gigs. They feature widely in early mythology and history.
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