Maderan

Maderan (マデラン, aka Madelan) is a volcanically active planet completely covered by thin "smokestack"-like volcanoes whose ashy output fills the entire atmosphere with roiling red clouds.

Something in the atmospheric ash has a diffusing effect on Maximal and Predacon long-range scanning and communications systems, rendering them extremely unreliable. Predacon teleportation technology does not seem to suffer the same problem.

Fiction

Beast Wars Neo cartoon

The Dinosaur arrived at Maderan, and, though DNAVI detected an Angolmois Capsule on the planet, Sling, Guiledart and Saberback (mostly Sling) displayed a marked lack of enthusiasm for searching the entire planet on foot, and instead proposed laying a trap for the Maximals, dividing their forces with two false Angolmois Energy signals and counting on the planet's atmosphere to prevent them from signaling Big Convoy.

It was a good plan, a solid plan. Unfortunately it reckoned without Stampy's superhuman cowardice, which caused him to hang back and avoid their snare. Rather than confront the Predacons himself, Stampy disabled the electromagnetic wave generators that trapped his friends, then retreated again so he could use a Spy Shot to launch an emergency beacon above the atmosphere and call Big Convoy to come help!

Stampy found the planet's real Angolmois Capsule by taking a nap under the dormant chimney where it was embedded. Hang in There, Stampy

The AllSpark Almanac

Madelan was an unclaimed or neutral organic planet in the Milky Way. The AllSpark Almanac II

Prime cartoon

Seaspray's signal was a couple of lightyears from Maderan when Wheeljack picked up his signal. They arranged to meet in the Dromedon System. Loose Cannons