Many Starfleet commanders disliked the vessels, saying they were too underpowered for a light crusier.
Thye were normally assigned patrol duties and short-range exploration missions.
The first Borg incident, hostilities with the Klingon in 2372, the Dominion War, Challengers were on the frontline of the Federation's 24th century conflicts.
212 crew members normally served aboard them, with room for 80 passengers. In an emergency, room could be amde to hold 2,750 among its eight decks.
A pair of over and under type 5D warp nacelles and a class 7/M warp drive could propel the light crusiers at warp 9.1 for eight hours, though normal cruising speed was warp five.
They normally carried six shuttles and three shuttlepods.