Ark (G1)
The Ark is the name given to the Autobot Spaceship that, in most versions of the Generation 1 story, originally carried Optimus Prime and Megatron's troops to Earth.
The Ark is a Vanguard-class Deep Space Interceptor. It has 5 Decks and houses a full crew compliment of 300 Transformers. (Although it can be flown by only a handful if necessary.) Its environment is fully-automated and self-sufficiant.
It is armed with 16 particle-combustion canons (port), 16 laser emitters (starboard), a primary starfield missile launcher, and an Overshock sonic battery.
G1 Cartoon
The Autobot ship in the G1 cartoon is never actually named. Fans have generally called it the Ark however, borrowing the name from it's Comic counterpart.
The Cartoon version of the ship tends to have a more rounded ovoid look to it

