Egg Carrier

The Egg Carrier was a large airship created by Dr. Eggman, and a quite important transport for the doctor during an attempt to conqer the world. It was colored black, red and yellow, and was more heavily armed than his previous ships. It had missile launchers, air mines, lock-on energy cannons and a large hidden laser cannon hidden in the beak-like bulb in the front. The Egg Carrier could transform into two shapes; offensive and defensive. While being somewhat streamlined in its offensive shape, the defensive shape folded the wings out to the sides and makes it much harder to get from the landing area to the bridge. The Egg Carrier was crewed by Eggman and various robots, including the first E-100 Series robots, notably E-102 Gamma.

The Chaos Crisis
Eggman first used the Egg Carrier to find and destroy the Master Emerald on Angel Island in order to free Chaos. After succeeding, the Egg Carrier landed in the Mystic Ruins for later usage. Meanwhile, this carrier would be used as a base of sorts, where he sent the E-100 series to locate a certain amphibian life form, and where Amy Rose was taken to when she and a Flicky were abducted by two of Eggman's robots. Both tasks were seemingly crucial to restoring the creature known as Chaos. After fleeing from Sonic, Tails, and Knuckles, Eggman decided to take the Egg Carrier out of its hiding place in a very wide river (unknowingly allowing Big the Cat to get aboard. Undaunted, Sonic and Tails used the Tornado to get aboard,and Knuckles was warped there after receiving a vision from Tikal. Knuckles and Big found what they were looking for, and Amy managed to escape from her cell, thanks to E-102. On the deck, Sonic and Tails defeated E-102, when suddenly the ship started losing altitude, so Tails, Amy and E-102 fled the ship. Sonic stayed to find Eggman, which he did, along with Chaos. Sonic, Knuckles and Big all fought and defeated Chaos, and everyone fled the ship as it crashed into the ocean below and burst into flames. (StH: #80, #81, #82, SSS: #13)

After Chaos obtains all seven Chaos Emeralds, becomes Perfect Chaos and destroys Station Square, Eggman reveals a second ship that looks like the Egg Carrier but unpainted, which was a failsafe to use against Chaos in case he rebelled. However, the ship is proved to be nothing compared to the power of Chaos, who shoots it down with a large energy beam. (StH: #83)

Background information
The second Egg Carrier is not named, but since it is completely grey, and referred to as a destroyer, (and the first Egg Carrier went up in flames, anyway) it is obviously not the same ship.