How to Use a Humminbird 997 Fish Finder

How to Use a Humminbird 997 Fish Finder
The Humminbird 997 fish finder is a side-imaging sonar and GPS device. Developed by Humminbird, one of the United States' oldest and most popular fish finder manufacturers, the 997 product includes some of the company's most advanced fish finding and side-imaging technology and can work in water as deep as 1,500 feet.

Instructions

Difficulty: Moderately Easy

Things You’ll Need:
  • 12-volt power cable (included with original device) Soft cloth (optional)
  • 12-volt power cable (included with original device)
  • Soft cloth (optional)
Step 1
Connect the 997 fish finder to your boat's electrical system. Plug one end of the included power cable into the side of the Humminbird fish finder. Connect the other end to either your boat's battery or to your boat's fuse panel, typically found near your boat's control console.
Step 2
Turn on your boat and navigate to wherever you wish to begin searching for fish. Start in an area in which you know the fish may exist, which varies depending on their species. For example, trout can typically be found in open water while largemouth and smallmouth bass are typically near drop-offs. You do not need to worry too much about finding the right location, as that is what the fish finder is designed to help you with.
Step 3
Power on the device's control mechanisms. Press and hold the power button for two seconds, found near the bottom of the device's face plate. The screen will illuminate and display the Humminbird logo before bringing up its sonar display.
Step 4
Review the sonar display. Look at the left side of the screen. This displays your trip log, including the current water depth, the water surface temperature and your boat's speed.
Step 5
Determine the underwater terrain on the right side of the screen. This section displays what sort of ground you are floating over. The dark-colored line near the bottom of the screen is the terrain. A hard bottom such as clay or flat rock is displayed as a thin line. A soft sediment bottom such as sand appears as a thick line. Meanwhile, broken lines portray a rocky, uneven terrain.
Step 6
Check for fish. Fish appear as moving dots or ovals above the lines that portray the ground. While the 997 fish finder cannot display detailed images that portray the exact fish species, you can make an educated guess as to their size, according to the size of the dot on the screen.
Step 7
Press the "MARK" button on the front of the 997 fish finder if you wish to save your current location in the device's internal library. This may be useful if you see a lot of fish but do not want to stop. If you continue traveling and later want to return to the area that you marked, press "GOTO" on the front display and select your previously marked location. The device will then use GPS to navigate you back to the saved spot.

Tips & Warnings

 
Store a soft cloth near the fish finder. Over time, spray from the water can make it difficult to read the device's screen, especially in the glare from the sun. A quick wipe-down can resolve this issue.
 
Store a soft cloth near the fish finder. Over time, spray from the water can make it difficult to read the device's screen, especially in the glare from the sun. A quick wipe-down can resolve this issue.

Article Written By Josh Duvauchelle

Josh Duvauchelle is an editor and journalist with more than 10 years' experience. His work has appeared in various magazines, including "Honolulu Magazine," which has more paid subscribers than any other magazine in Hawaii. He graduated with honors from Trinity Western University, holding a Bachelor of Arts in professional communications, and earned a certificate in applied leadership and public affairs from the Laurentian Leadership Centre.

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