Humminbird® 688ci HD DI Combo
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- Ultra-bright 5" HD (640V x 480H) color display
- DualBeam Plus™
- Down Imaging®
- Precision GPS
- Built-in UniMap™
- Max. depth: 350' (DI) and 600' 2D
- Sonar coverage: 20º/60º
- Speed/Temperature included
See what you're missing! Humminbird's 688 HD DI Combo features High-Definition Down Imaging Sonar on a best-in-class 5" HD color screen. Combined with SwitchFire down-looking sonar with Clear and Max modes. Use clear mode to filter out underwater clutter and Max modes to show thermoclines and lure movement. Maximum depth: 350' (DI), 600' (2D). Power Output: 4,000 watts (PTP) and 500 watts (RMS). Down Imaging 455 kHz/75 degrees 800 kHz/45 degrees.
Dual beam PLUS w/ Switchfire 200 kHz/28 degrees 455kHz/ 16 degrees. Made in USA
Manufacturer model #: 409460-1.
Rated 3.3 out of 5 by 4
Rated 2 out of 5 by cornflakes bad deal for me
gps takes 5 to 10 min. to load also alarms turned to high stiil cannot hear them well. no my hearing is not bad
April 12, 2014
Rated 1 out of 5 by drfishing Very poor GPS Performance
I'm very surprised by the other two reviews because my experience with two of these units is very different. I do not nor have I ever worked for a GPS or fishfinder manufacturer. I am a retired individual that likes boating and fishing.
My review: The GPS on this unit does a cold start if the unit has been shut down for more than two hours. This means a 5 to 10 minute wait time for a GPS lock. The GPS also has very poor sensitivity and will lose lock often if in the open with an overcast sky. This is with the unit mounted on the dash in the open with no obstruction of the entire sky. I didn't experiment with the unit being covered, but assume it will not lock at all if it is covered by a boat top. I had Humminbird send me a replacement unit and it also performed exactly the same as described above. Also, The depth, speed, temp information are keyed in white boxes on the screen that block much of the chart rather than just keying the digits themselves. A very rudimentary keyer. I returned both units and purchased a different brand which I am very happy with.
March 6, 2014
Rated 5 out of 5 by thunderNlightin Great product
Good clear images, better then my 797si. Easy to install.
March 1, 2014
Rated 5 out of 5 by crappiemagicman sweet little unit
The 688 DI is a great little unit. I have a 900 series at the console of my boat and I wanted another down imaging unit at my trolling motor. You cant beat this fishfinder for the money. It does everything I hoped it would and more. Once I find a spot I want to fish with my other unit I hop to the bow and start using my trolling motor. I love not having to run back to my console to mark waypoints anymore. DI is very good on this unit as is the gps. If you want a great fishfinder without breaking the bank this is what you need. If you want side imaging you can get that for just 200 more dollars. I really like the price points of the 2014 humminbirds too.
March 1, 2014
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