The Marauder Bomber is the workhorse of the Imperial Navy. Capable of both atmospheric and void operations, it is used as an attack craft in fleet actions as well as fulfilling a tactical role, supporting ground offensives by bombing enemy troop concentrations and support positions. Such tactical bombing missions are often launched prior to, and in support of, Imperial Guard offensives.
This lovely Forge World Marauder Bomber was on display at Warhammer World.
The Marauder Destroyer varient was developed during the second war for Armageddon after heavy losses in the Naval airforces. Orkish dominance of the skies over certain areas of Armageddon forced the few remaining Marauders to be refitted to operate at night, flying at extremely low level where they could evade detection. Their new heavier weapon payload made anything which got in the way seriously regret it!
The 40K version of this model is huge, but on my most recent visit to Warhammer World I was able to see the Aeronatica Imperialis version in the flesh (well the plastic) and I think I might get some of those at some point.