If you’re stepping up into the world of higher-end twins and some high-flying singles, you’ll eventually be faced with maintenance of onboard weather radar. Upgrading and maintaining weather radar is an expensive investment, and the benefits of real-time ship’s weather radar might not be obvious to today’s datalink pilot. But resist the urge to yank ship radar from the airframe—it still has its place.

On a recent trip up the East coast in a small twin, we were picking our way along the back edge of a slow-moving line of Gulf-fed buildups that offered no shortage of drama for hundreds of miles. It was a tense flight, but tempered by the NEXRAD images steadily arriving from XM.