The decision
When you are choosing marine electronics sonar navigation, the first decision is usually whether you want a mounted console system or a handheld unit you can take anywhere. The Humminbird 597ci 597 HD Fish Finder sonar is a full console-style unit with color chart plotting and side scanning. The Portable Fish Depth Finder - Handheld Sonar Fishfinder for Kayak and Boat is a compact, battery-powered unit with a neck strap and a 328-foot depth rating. This head-to-head helps you choose the right approach for how and where you fish.
Quick verdict
If you fish from a mounted console and want the situational awareness of chart plotting and side scanning, the Humminbird is the stronger pick. If you want something you can carry from kayak to boat and keep close at hand, the Portable Fish Depth Finder gets the job done at a lower price. The spread between them is $166.01, so your choice is driven by how and where you fish.
At a glance
| Humminbird 597ci 597 HD | Portable Handheld Fish Finder | |
|---|---|---|
| Price | USD 252.00 | USD 85.99 |
| Display | Color display with chart plotting | 2-inch LCD |
| Sonar features | Side scanning, Fish ID, depth alarm, temperature reading | Fish and depth detection, fish alarm, 5 sensitivity levels |
| Mounting | Mounting hardware included | Handheld with neck strap |
Where each product wins
- The Humminbird wins when you want the full picture on a screen: color display, chart plotting, side scanning, Fish ID, and depth and temperature readings all show up in its feature set.
- The Portable wins for carry-and-go fishing: it is designed for one-handed use, includes a neck strap, runs 4-5 hours on a new battery, extendable with battery-save mode, and reaches a maximum depth of 328 feet.
Product notes
Humminbird 597ci 597 HD Fish Finder

This is the unit to consider when your fishing happens from the boat itself. Its feature set includes a color display, chart plotting, side scanning, Fish ID, a depth alarm, temperature reading, and expandable memory. The package includes a transducer and mounting hardware, so you are getting a complete sonar system rather than a gadget you move between spots. The trade-off is that it is not a handheld model; it needs a place on your watercraft and is not something you will slip into a pocket. For anglers who want a console-style view with side scanning and recording, this is the more capable system of the two.
Portable Fish Depth Finder - Handheld Sonar Fishfinder

The Portable earns its place when mobility matters more than display size. It is battery powered, compact enough for one-handed use, and comes with a neck strap so you can keep it ready while moving between kayak and boat. The sonar identifies weeds, sand, and rocks on the bottom, offers five sensitivity levels, and gives you a fish alarm when fish or schools are nearby. Battery-save mode stretches the 4-5 hours of operation. The limitation is the 2-inch LCD, which is great for quick depth readings but a much smaller canvas than the Humminbird's color display. Its feature set is about sonar and depth rather than chart plotting or side scanning.
Final choice by use case
Choose the Humminbird 597ci 597 HD when you want a mounted, full-featured sonar console with chart plotting and side scanning on your boat. Choose the Portable Fish Depth Finder when you want a lightweight, battery-powered unit you can use on a kayak or a boat without installation. If you fish both ways, the handheld covers trips and the Humminbird covers the main boat.