USS Voyager (NCC-73602)

The USS Voyager (NCC-73602) was a Federation starship, an science vessel in Starfleet service in the 2370s decade. 

History and specifications
In one permutation of reality, Voyager was launched with an alternate configuration and registry number, instead of USS Voyager (NCC-74656). The NCC-73602 included a triangular primary hull, vaguely reminiscent of the newer, tactically oriented. The secondary hull was angular. style nacelle pylons connected this hull with a pair of long warp nacelles. Unlike the regular Voyager, this version lacked the variable warp-field geometry that allowed its pylons to pivot when entering warp.

Both vessels were designed with an Aeroshuttle attached to the ventral saucer section, and equipped with the revolutionary Emergency Medical Hologram.

Voyager entered service around 2371 and visited Earth before being swept into the Delta Quadrant by the Caretaker. 

In 2410, the larger, more streamlined long range science vessel, and its USS Pathfinder (NCC-47656) prototype, were based on this unrealised Intrepid-class concept and the regular USS Voyager by the Starfleet Corps of Engineers. The Pathfinder was involved with the exploration of the Delta Quadrant as part of Operation Delta Rising. This ship's saucer was wider and rounder at the rear, and dominated by a large secondary deflector at the bow. It included the elongated nacelles attached to the downswept pylons characteristic of the NCC-73602 design.