Affiliation: Federation Starfleet
Type: Explorer
Active: 2360s-
Length: 642.51 m
Beam: 463.73 meters
Height: 195.26 meters
Mass: 4,500,000 metric tons
Decks: 42
Crew complement: roughly 1,014 (officers, enlisted, and civilian)
Speed: Warp 9.8 (Possible at an extreme risk)
Warp 9.6 (12 hours)
Warp 9.2 (max. cruise)
Warp 6 (initial average cruise)
Warp 5 (later implemented Starfleet speed limit)
Armament: 12/14 phaser arrays; 2 torpedo launchers; 250 photon torpedoes
Defenses: Deflector shields

Tactical systems

The Galaxy-class was equipped with ten phaser banks, distributed in phaser arrays at various points along both hulls. One array was located on the dorsal of the battle section and could only be used following a separation. There were also fore and aft torpedo launchers on the engineering section. (TNG: "Conundrum") Each launch tube was capable of firing at least five photon torpedoes simultaneously, each torpedo capable of being independently targeted. (TNG: "The Arsenal of Freedom", "Yesterday's Enterprise") In the 2360s, Galaxy-class ships typically carried about 250 photon torpedoes. The torpedo launchers were also capable of launching probes. The Galaxy-class also supported a high-capacity deflector shield grid. (TNG: "Conundrum")

While "Conundrum" establishes that there were only ten phaser banks aboard the ship, a visual inspection shows twelve arrays and effects have established extra emitters on the nacelle pylons and in the forward torpedo launcher. (TNG: "The Best of Both Worlds", "Darmok") The aft-firing saucer launcher was never established in dialogue, but is visible on the filming model. The Star Trek: The Next Generation Technical Manual states that ten torpedoes can be launched simultaneously and 275 torpedoes are usually carried by the ship. In TNG: "Preemptive Strike", Ro stated there was a weakness in the aft-shields where the impulse exhaust destabilized them, but this appeared to be a scam as Captain Picard give the order to let the Ro's ship come through.

Affiliation: Federation Starfleet
Active: 2370s
Length: 344 m
Mass: 700,000 metric tons
Decks: 15
Crew complement: approx. 150
Speed: Warp 9.975 (maximum warp)
Warp 9.75 (max. sustainable cruise velocity)
Armament: 13 Phaser arrays, 38 photon torpedoes,
Defenses: Deflector shields

Tactical systems

The Intrepid-class utilized a ship-mounted phaser array system. The dorsal saucer section was covered by four phaser arrays, two of which extended from the aft curvature, along the length of the saucer and stop short of the auxiliary deflector incision. The aft firing arc was covered by two smaller arrays, angled on the rear of the saucer section. The relative bottom of the ship was protected by two similar arrays as on the dorsal saucer section, extending to the rear of the saucer and following the curve to the auxiliary deflector incision. More protection was provided by an array that extended across the ventral engineering hull just fore of the warp core ejection port. Far-aft strips were provided on the underside of the mobile nacelle pylons and under the shuttlebay landing deck on the underside of the ship for a total ship's complement of thirteen arrays. (Star Trek: Voyager)
An additional phaser emitter was seen firing from the ventral surface of the ships right nacelle in "Unimatrix Zero".
[edit] Torpedo systems

The Intrepid-class housed five standard torpedo launchers (two fore and two aft, and one on the dorsal side of the ship ). The USS Voyager was loaded with type-6 photon torpedoes in 2371. She also had at least four class-10 photon torpedo warheads and two tricobalt devices in her torpedo arsenal, as well as spatial charges. Quantum torpedoes were also compatible with Intrepid-class launchers, with some modification. (VOY: "Caretaker", "Resolutions", "Dreadnought", "Scorpion, Part II", "In the Flesh", and more)