After Starfleet starships were converted to a modular design, a group from the Starfleet Corps of Engineers working at Utopia Planitia wondered if vessels from the Federation's past could be constructed in this manner. Working with Federation historian Geoffrey Pacelli, the SCE officers chose the famed NX Class for reconstruction. The NX Class Starship Replica sports the classic look of Earth's starships from the 22nd century, but has been updated with modern technology to meet current Starfleet specifications for Lieutenant-rank missions..
Originally Posted by C-Store
It carries a crew of 85, and in a nod to the technology of the 22nd Century the SCE has added a Grappler, which is less efficient than a tractor beam but can hold an enemy for a short time.
I wanted to compliment the written 'in-character' explanation for the NX-01 Replica. You really should re-write the entry for the TOS Constitution as well.