Marine gear & systems guides
Fit the boat first. Then buy the gear.
Most buying guides start with this week’s sale. These start with your boat: the batteries and charging you already have, the space at the helm, the network behind the dash, and what all of it has to work with.
Who this is for
Do-it-yourself ownersShallow-water anglers
Trolling-motor banks, a forward and console display, and a charging setup that has to keep up with all of it on a short run home.
Nearshore and offshore runs
Bigger screens, radar on the list, AIS worth thinking about, and a 12-volt system that was sized for a lot less.
Weekends and overnights
House loads at anchor, shore power at the dock, maybe a solar panel, and a battery swap that is never as simple as it sounds.
The first five guides
All guides- GUIDE 01
Start with the electrical system before you buy a new display
The framing guide. Inventory batteries, charging, wiring, and networks first, so the new screen doesn't inherit old problems.
- GUIDE 02
Lithium vs AGM, and how to size a house or trolling-motor bank
What each chemistry asks of the rest of your boat, plus the simple math for sizing a bank from a real load list.
- GUIDE 03
Choosing a chartplotter by helm space, the brand you have, and what comes later
Measure the dash, count what is already on the network, and plan radar and sonar before you pick a screen.
- GUIDE 04
Charging when you upgrade to lithium: DC-DC, shore charger, and solar
Why the alternator is the part people forget, and how the three charging sources should fit together.
- GUIDE 05
VHF with DSC and AIS: a sensible baseline for a recreational boat
MMSI, GPS input, AIS receive vs transmit, and what makes sense on a bay boat, center console, or small cruiser.
How these guides work
Systems firstStart from the boat
Every guide begins with what is already aboard and what the new gear has to work with, then narrows to products.
Name the trade-offs
Weight, cost, charging, network lock-in, and what you’re signing up for later. No one product is right for every hull.
Only checked facts
Model names and specs come from the maker’s current pages. When we couldn’t confirm a price or number, we left it out.
The Refit Brief is a new, independent guide site. It isn’t a dealer and has no sponsors. Some product links may become affiliate links once they’re set up; the disclosure explains how that will work.