Maybe it mattered less once the Defiant supplanted the runabouts as the crew's primary means of transportation, but it seems like they were pretty diligent about keeping track of which runabouts were lost and about identifying their replacements fairly quickly, but from the fifth season on, they didn't seem to bother with it.
-As of "Emissary", DS9 was assigned three runabouts: the Rio Grande, the Yangtzee Kiang, and the Ganges.
-In season 1, the Yangtzee Kiang crashes, and is replaced by the Orinoco in season 2.
-In season 2, the Ganges is destroyed by the T'Lani, and is replaced by the Mekong in the following episode.
-In season 3, an unnamed runabout (presumed to be the Mekong) is abandoned during the battle with the Jem'Hadar and is replaced by the Rubicon later that season.
-In season 4, the Orinoco is destroyed by the True Way, and is replaced by the Yukon later that season.
-We also know that at some point no later than late season 4, DS9 was assigned a fourth runabout (the Volga).
From season 5 on, things get a great deal murkier. A runabout was destroyed by the Jem'Hadar in "The Ship". I assumed it was the Rubicon, since the Rio Grande, Volga, and Yukon were all accounted for in "By Inferno's Light", and that the unnamed Runabout that our heroes escaped from the Dominion prison camp is was its replacement. Unfortunately, "One Little Ship" shot that theory to hell, so we don't know the name of that ship.
A runabout may or may not have been destroyed in "Nor the Battle to the Strong", and one was definitely destroyed in "Empok Nor", but we don't know the name of either, nor its replacement.
Season 6 introduced the Shenandoah and season 7 the Gander, but we don't know which of the above runabouts they were replacing (the Gander could also have been a replacement for the Shenandoah itself, which was abandoned in "Valiant") or even if they were replacements at all. It's quite possible that as DS9's importance grew, more runabouts were needed for various functions.
As I said, the runabouts tended to be treated more like shuttles in later seasons, and it's a pity they didn't keep better track of them after a while.
-As of "Emissary", DS9 was assigned three runabouts: the Rio Grande, the Yangtzee Kiang, and the Ganges.
-In season 1, the Yangtzee Kiang crashes, and is replaced by the Orinoco in season 2.
-In season 2, the Ganges is destroyed by the T'Lani, and is replaced by the Mekong in the following episode.
-In season 3, an unnamed runabout (presumed to be the Mekong) is abandoned during the battle with the Jem'Hadar and is replaced by the Rubicon later that season.
-In season 4, the Orinoco is destroyed by the True Way, and is replaced by the Yukon later that season.
-We also know that at some point no later than late season 4, DS9 was assigned a fourth runabout (the Volga).
From season 5 on, things get a great deal murkier. A runabout was destroyed by the Jem'Hadar in "The Ship". I assumed it was the Rubicon, since the Rio Grande, Volga, and Yukon were all accounted for in "By Inferno's Light", and that the unnamed Runabout that our heroes escaped from the Dominion prison camp is was its replacement. Unfortunately, "One Little Ship" shot that theory to hell, so we don't know the name of that ship.
A runabout may or may not have been destroyed in "Nor the Battle to the Strong", and one was definitely destroyed in "Empok Nor", but we don't know the name of either, nor its replacement.
Season 6 introduced the Shenandoah and season 7 the Gander, but we don't know which of the above runabouts they were replacing (the Gander could also have been a replacement for the Shenandoah itself, which was abandoned in "Valiant") or even if they were replacements at all. It's quite possible that as DS9's importance grew, more runabouts were needed for various functions.
As I said, the runabouts tended to be treated more like shuttles in later seasons, and it's a pity they didn't keep better track of them after a while.
Last edited: