What actually matters when you’re picking your first (or fifth) RC boat, in plain language.
A Ready-to-Run (RTR) boat comes with the hull, motor, radio, receiver, and usually a battery and charger already installed — charge it up and it runs the same day. A kit boat ships as a bare hull (sometimes not even painted) and expects you to add your own radio gear, motor, and electronics. Almost everyone should start with an RTR; kits are for pilots who already know what radio system and motor they want and enjoy the build itself.
Brushed motors are simple, inexpensive, and fine for pool and pond boats where top speed doesn’t matter. Brushless motors cost more but run cooler, last far longer, and are the only sensible choice for anything marketed as a racing boat — a brushless racing hull with a similarly-rated brushless ESC is what actually delivers the speed printed on the box.
Pool and calm-pond boats can be small and light — chop and wake don’t matter. Lake boats benefit from a self-righting hull, since a capsize on open water without one usually means swimming or a lost boat. Anything called a “deep-V” or “catamaran” hull is built to handle chop at speed; a flat-bottom hull is not.
Most RTR boats ship with a specific battery connector (JST, XT60, Deans/T-plug) — a spare or upgrade battery has to match, or you’ll need an adapter. LiPo batteries pack more power per ounce than NiMH and are standard on anything brushless, but they need a proper balance charger and should never be charged unattended or left fully discharged for long periods.
Most RTR boats include a matched transmitter and receiver, already bound, right in the box — nothing extra to buy for a single boat. A standalone transmitter is worth buying once you’re running more than one RC vehicle, since one good radio can bind to multiple receivers across boats, cars, and planes.