The largest ship I ran was the
Azhanti High Lightning Frontier Cruiser (60,000 dtons). The party was the command crew and several special-purpose groups aboard her, and the campaign was enough like
Star Trek: Voyager that I wondered if an ex-player had joined Paramount's writing staff. In that campaign, the cruiser had been thrown innumerable parsecs Coreward by a Zhodani-weapon-caused misjump and had to make its way home across several alien domains. The final run was through Vargr-controlled space, and every 10- and 20-thousand raider ship captain wanted the FC for his very own...and they were pretty damaged and low on supplies by that point, so it was quite a gauntlet.
There are, I believe, eighty-four decks, ten of which are roughly one third of the others in size. Let's say that there's the equivalent of 77 equally-sized decks, or about 780 dtons on each one. The ten decks in the "nose" are therefore about the size of a 150-200 dton ship.
Looking at my deckplans in
Arrival Vengeance (unfortunately, my copy of AHL is long gone
![Frown :( :(](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f641.png)
), each main deck is a rough rectangle 66 meters port/starboard and 40 meters dorsal/ventral.
The maw of the spinal gun is 7.5 meters in diameter (shudder).