MC75 cruiser The MC75 cruiser , also referred to as the MC75 modified star cruiser , was a model of Star Cruiser in the service of the Alliance Fleet . One such ship , the " Profundity " served as Admiral Raddus ' s flagship during the Battle of Scarif . Characteristics . The MC75 cruiser , or alternatively the MC75 modified star cruiser , was a former Mon Calamari city - ship converted into a war cruiser by the Alliance to Restore the Republic . The enormous vessel stood at 1 , 204 . 44 meter s in length , and was powered by twelve Kuat Drive Yards Gemon - 15 sublight ion drive s repurposed to give the massive vessel a cruising speed to match starfighter escorts . These sublight drive s were shrouded beneath the engineering plane of the heat - dissipating engineering structure . The refits carried out at deep - space facilities afforded these cruisers reinforced battleship hulls and a weapon collar modification to hold primary weapons and shield generators . The armored forward hull rendered the ship ' s concealed deflector shield generator s redundant , though a deflector shield emitter array was fitted to the aft . The MC75 boasted twenty point - defense laser cannon s , twelve broadside turbolaser s , four heavy ion cannon s , twelve proton torpedo launcher s , and six tractor beam projector s concealed within a port forward of the weapon collar . An armored outrigger fin on the ventral hull held the command bridge pod and receiver array , opposite a dorsal communications transmission mast and sensor cluster . These blade - like fins , coupled with the vessel ' s tapered profile , were design choices intended to trigger primal fears of predatory fish among the aquatic Mon Calamari . Next to the rear of the ventral outrigger fin was an ordnance pod . The city - ship ' s former civic atrium was hollowed out and converted into a docking bay and starship service area , overseen by a hangar traffic control suite protected by overlapping shields and magnetic containment fields to keep oxygen and pressure regulated . There were at least two variants to the ship class , including the MC75 Armored Cruiser and the MC75 Ordnance Cruiser . History . When the Galactic Empire occupied the ocean planet of Mon Cala , the native Mon Calamari began a mass exodus from their homeworld , taking many of their enormous city - ships with them . The MC75 cruiser " Profundity " , one of the many spaceworthy structures that operated as transport s and passenger liner s , was originally the civic governance tower in Nystullum , and was among the vessels converted into warship s by the rebellion at deep - space facilities . As one of the first battle - ready ships , the " Profundity " became the flagship of Admiral Raddus , the former mayor of Nystullum , and saw action at the Battle of Scarif in 0 BBY . The MC75 cruisers were only the first wave of ships to escape Mon Cala however , with other waves of starships following . Behind the scenes . The MC75 is clearly the evolutionary descendant of the MC80 cruisers that would appear in later films . However , the ship ' s design was heavily inspired by conceptual art and models based by John Goodson , who designed the " Invisible Hand " .