A Starfleet class of the 2380s that updates the lines of the old Excelsior class, represented by Captain Sonya Gomez's USS Archimedes in Star Trek: Lower Decks.
The Obena class has the long neck, flat saucer and low engineering hull of the Excelsior class, reworked with the technology of the late 24th century. Its ships are given prestigious assignments such as first contact.
The USS Archimedes appears in First First Contact, the finale of the second season. Under Captain Sonya Gomez, once an ensign on the Enterprise-D, it is sent to open relations with the Lapeerians, with the Cerritos in support. A solar flare makes a nearby planetoid explode and the blast knocks out the Archimedes, leaving it drifting towards the Lapeerian world. The Cerritos crew strip off their own outer hull plating so that their ship can cross the debris field and restart the Archimedes's engines.