The Emdor-class starship was a type of Federation antimatter tanker created by Starfleet in the 2370s, the class and the prototype named for Emdor, a moon located in Federation space. All Emdor-class vessels were named for Federation moons with indigenous names. (Trekker's Alternity Galactopedia) The Emdors weighed in at 800,000 metric tonnes (fully loaded) and 147,382 metric tonnes dry, each with a crew of 74 (9 officers and 65 crew). The vessels measured 13 decks in height, 305 meters in length, had a maximum cruising speed of warp 8.7 and were armed with a torpedo launcher and 4 phasers.