BrandFish FinderGarmin

Garmin Waterproof Fishfinder 300C Review

Welcome to our review of the Waterproof Garmin 300C Fishfinder.  

In this write-up we will examine the Garmin 300C by looking over its features, comparing customer reviews, and providing an overall rating and recommendation.

Garmin Fishfinder 300C Description & Features

Looking for an affordable, freshwater lake fishfinder with a color display? The reasonably priced Fishfinder 300C color fish finder is the perfect choice for many anglers.

Observe Fish in Clear, Bright Color

The 300C possesses a mega bright, full-resolution 3.5-inch QVGA color display. Users of previous Garmin models will be impressed with improvements made to the user and graphical interface. Get live screen updates with Ultrascroll and incredible shallow water capabilities with a dual-beam transducer.

Screen Size3.5 Inches
Item Weight3.6 Pounds

The Garmin 300C also offers top-rated sonar performance.

300C Features

  • Auto Gain setting automatically adjusts sonar sensitivity
  • See-Thru technology displays strong and weak returns
  • Round flasher display mode
  • Whiteline shows you how thick the bottom is
  • 2X and 4X automatic and manual zoom
  • Battery voltage indicator
  • Single NMEA-0183 output

Garmin Fishfinder 300C Reviews

Sample Customer Reviews

Reviews of the Garmin 300C Fishfinder are outstanding overall with almost all reviews we’ve located being either 4 or 5 out of 5 stars.

Positive Customer Reviews

I take advantage of this fish finder just for kayak angling in Gulf of Mexico, normally a approximately 200 meters off of the shoreline. At the time of penning this evaluation, I’ve entirely flipped the kayak and immersed this fish finder two seperate times. Moreover, I’ve entirely soaked it on numerous instances while shifting through the surf while venturing out. Up to now there aren’t any problems.
— R.S.

Has every features you’ll need and it’s simple to use.  Extrememly glad I bought this model. It’s great quality and doesn’t cost an arm and leg.
— L.X.

The portability of this fish finder makes for simple setup and removal. Love the screen, it’s crystal clear regardless of the weather conditions.  It’s nice not having to worry about it getting wet in rain or worse.
— J.O.

Garmin Waterproof Fishfinder 300C

  • Frequency = 80/200
  • Resolution (VxH) = 320 x 240
  • Screen Size = 3.5″
  • Speed/Temp = Temp Only
  • Transducer Type = Transom Mount
  • Watts RMS – Max = 150


Welcome to FishFinder Review. Here at we will be examining a variety of popular fish finders, depth finders, GPS, and chartplotters.

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