Ambassador Class
Class & Type: Ambassador Class Explorer
Commissioning Date: 2322
Hull Systems
Size: 7
Length: 526.33 m
Beam: 325.26 m
Height: 180.15 m
Decks: 40
Mass: 3,825,000 mt
SUs Available: 1,750
SUs Used: 1,659
Resistance
Outer Hull: 3
Inner Hull: 3
Structural Integrity Field
Main: Class 4 (Protection 7/11) [1 Power/Protection/Round]
Backup: Class 4 (Protection 4) [1 Power/Protection/Round]
Backup: Class 4 (Protection 4) [1 Power/Protection/Round]
Personnel Systems
Crew: 900
Troops:
Passengers: 200
Evac: 10,000
Crew Quarters
Basic: 800
Expanded: 150
Luxury: 60
Unusual: 15
Enviromental Systems
Basic Life Support: [12 Power/Round]
Reserve Life Support: [6 Power/Round]
Emergency Life Support: [42 Emergency Shelters]
Gravity: [1 Power/Round]
Consumables: 3 year
Food: [2 Power/Round]
Industrial:
Type: Network of small replicators [2 Power/Round]
Type: 1 Large Unit [2 Power/Replicator/Round]
Medical Facilities: 7 (+2) [7 Power/Round]
Recreation Facilities: 6 [12 Power/Round]
Personal Transport: Tubrolifts, Jefferies Tubes [2 Power/Round]
Fire Suppression System: [1 Power/Round when active]
Cargo Holds: 700,000 Cubic Meters
Locations: Aft Saucer & Mid Engineering
Escape Pods
Number: 160
Capacity: 8 persons per pod
Propulsion Systems
Warp Drive
Nacelles: Type: 5E
Speed: 5.0/9.0/9.2 [1 Power/0.2 Warp Speed]
PIS: Type H (12 Hours at Maximum Warp)
Impulse Engine
Type: Class 5
Speed: 0.7c/0.9c {7/9 Power/Round]
Location: Aft Engineering
Reaction Control System: (0.025c) [2 Power/Round when in use]
Power Systems
Warp Drive
Type: Class 8/N [Generates 445 Power/Round]
Location: Engineering
Impulse Engines(s): Class 5 [Generates 40 Power/Engine/Round]
Auxillary Power: 3 Reactors [Generates 5 Power/Reactor/Round]
Emergency Power: Type D [Generates 40 Power/Round]
EPS: Standard Power Flow, +60 Power Transfer/Round
Standard Usable Power: 485
Operations Systems
Bridge: Saucer Dorsal
Computers
Core 1: Saucer [5 Power/Round]
Core 2: Engineering [5 Power/Round]
Navagational Deflector: [5 Power/Round]
Range: 10/20,000/50,000/150,000
Accuracy: 5/6/8/11
Location: Forward Ventral
Sensor Systems
Long Range Sensors: [5 Power/Round]
Range Package: Type 5
High Resolution: 5 Light Years (0.5/0.6-1.0/1.1-3.7/3.8-5.0)
Lower Resolution: 15 Light Years (1.0/1.1-4.0/4.1-12.0/12.1-15)
Strength Package: Class 7 (Strength 7)
Gain Package: Class Alpha (+1)
Lateral Sensors: [5 Power/Round]
Strength Package: Class 7 (Strength 7)
Gain Package: Class Alpha (+1)
Navigational Sensors: [5 Power/Round]
Strength Package: Class 7 (Strength 7)
Gain Package: Class Alpha (+1)
Probes: 60
Sensor Skill: 4
Flight Control Systems
Autopilot: Shipboard Systems (Flight Control) 3, Coordination 2
Navigational Computer
Main: Class 2 (+1) [1 Power/Round]
Backups: 1
Inertial Damping Field
Main:
Strength: 9 [3 Power/Round]
Number: 6
Backup
Strength: 6 [2 Power/Round]
Number: 8
Attitude Control: [1 Power/Round]
Communications Systems
Type: Class 7 [2 Power/Round]
Strength: 7
Security: -4
Basic Uprating: Class Alpha (+1)
Emergency Communications: Yes [2 Power/Round]
Tractor Beam
Type: Class Gamma
Accuracy: 4/5/7/10
Location: Forward Dorsal
Type: Class Gamma
Accuracy: 4/5/7/10
Location: Aft Ventral
Type: Class Alpha
Accuracy: 5/6/8/11
Location: Aft Shuttlebay
Transporters
Type: Personal [5 Power/Use]
Pads: 6
Emitter/Receiver Array: Personal Type 6 (40,000 km Range)
Energizing/Transmission Coils: Class F (Strength 6)
Location: 2 Saucer, 2 Engineering
Type: Emergency [4 Power/Use]
Pads: 24
Emitter/Receiver Array: Emergency Type 3 (15,000 km Range)
Energizing/Transmission Coils: Class F (Strength 6)
Location: 2 Saucer, 2 Engineering
Type: Cargo [4 Power/Use]
Pads: 400 kg
Emitter/Receiver Array: Cargo Type 3 (40,000 km Range)
Energizing/Transmission Coils: Class F (Strength 6)
Location: 2 Saucer, 2 Engineering
Cloaking Device: No
Security Systems:
Rating: 4
Anti-Intruder System: Yes [1 Power/Round]
Internal Force Fields: [1 Power/3 Strength]
Science Systems: Rating 3 (+2) [3 Power/Round]
Tactical Systems
Forward Saucer Dorsal Phaser Array
Type: VIII
Damage: 160 [16 Power]
Number of Emitters: 80
Rate of Fire: 2 Shots/Round
Auto-Phaser Interlock: 4/5/7/10
Range: 10/30,000/100,000/300,000
Location: Saucer Section, Dorsal, Forward
Firing Arc: f/p/s/d
Starboard Saucer Dorsal Phaser Array
Type: VIII
Damage: 160 [16 Power]
Number of Emitters: 80
Rate of Fire: 2 Shots/Round
Auto-Phaser Interlock: 4/5/7/10
Range: 10/30,000/100,000/300,000
Location: Saucer Section, Dorsal, Starboard
Firing Arc: f/s/a/d
Port Saucer Dorsal Phaser Array
Type: VIII
Damage: 160 [16 Power]
Number of Emitters: 80
Rate of Fire: 2 Shots/Round
Auto-Phaser Interlock: 4/5/7/10
Range: 10/30,000/100,000/300,000
Location: Saucer Section, Dorsal, Port
Firing Arc: f/p/a/d
Aft Starboard Dorsal Phaser Array
Type: VIII
Damage: 160 [16 Power]
Number of Emitters: 40
Rate of Fire: 1 Shots/Round
Auto-Phaser Interlock: 4/5/7/10
Range: 10/30,000/100,000/300,000
Location: Saucer Section, Dorsal, Aft, Starboard
Firing Arc: a/s/d
Aft Port Dorsal Phaser Array
Type: VIII
Damage: 160 [16 Power]
Number of Emitters: 40
Rate of Fire: 1 Shots/Round
Auto-Phaser Interlock: 4/5/7/10
Range: 10/30,000/100,000/300,000
Location: Saucer Section, Dorsal, Aft, Port
Firing Arc: a/p/d
Forward Saucer Ventral Phaser Array
Type: VIII
Damage: 160 [16 Power]
Number of Emitters: 80
Rate of Fire: 2 Shots/Round
Auto-Phaser Interlock: 4/5/7/10
Range: 10/30,000/100,000/300,000
Location: Saucer Section, Ventral, Forward
Firing Arc: f/p/s/v
Starboard Saucer Ventral Phaser Array
Type: VIII
Damage: 160 [16 Power]
Number of Emitters: 80
Rate of Fire: 2 Shots/Round
Auto-Phaser Interlock: 4/5/7/10
Range: 10/30,000/100,000/300,000
Location: Saucer Section, Ventral, Starboard
Firing Arc: f/s/a/v
Port Saucer Dorsal Phaser Array
Type: VIII
Damage: 160 [16 Power]
Number of Emitters: 80
Rate of Fire: 2 Shots/Round
Auto-Phaser Interlock: 4/5/7/10
Range: 10/30,000/100,000/300,000
Location: Saucer Section, Ventrsal, Port
Firing Arc: f/p/a/v
Forward Torpedo Launcher
Standard Load: Type II Photon (200 Damage)
Spread: 8
Range: 15/350,000/1,500,000/4,050,000
Targeting Systems: 4/5/7/10
Power: [5+Spread Fired]
Location: Forward Ventral
Firing Arc: Forward, but are Self-Guided
Aft Torpedo Launcher
Standard Load: Type II Photon (200 Damage)
Spread: 8
Range: 15/350,000/1,500,000/4,050,000
Targeting Systems: 4/5/7/10
Power: [5+Spread Fired]
Location: Aft Dorsal
Firing Arc: Aft, but are Self-Guided
Torpedos Carried: 200
TA/T/TS: Class Alpha
Strength: 7
Bonus: 0
Weapon Skill: 4
Shields (Forward, Aft, Port, Starboard, Dorsal, & Ventral)
Shield Generator: Class 4 (Protection 700) [47 Power/Round]
Shield Grid: Type C (50% increase in Protection to 1,050)
Subspace Field Distortion Amplifier: Class Delta (Threashold 200)
Recharging System: Class 1 (45 Seconds)
Backup Shield Generators 6 (1 per Shield)
Protection: 467
Auxiliary Spacecraft Systems
Shuttlebays: Capacity for 30 Size worth of ships.
Standard Complement: 10 Shuttles & 10 Shuttlepods
Location(s): Aft Engineering
Captain's Yacht: Yes
Description & Notes
The Ambassador class was developed during the 2320's as a replacement for the ageing Excelsior and Constellation classes as Starfleets front line Explorer type vessel. Several innovative new features were included in the new design, most notably for the diplomatic and scientific missions. The USS Ambassador included high quality guest quarters and was equipped with elaborate conference facilities. Many of these areas were capable of maintaining a wide range of environments, a vital prerequisite for a vessel which would spend a great deal of its life dealing with non standard life forms. These facilities allowed her to host a much wider range of diplomatic functions than the more cramped Excelsior class, although it did lead to the class being dubbed "space hotels" in some quarters.
The scientific facilities of the Ambassador class were equally well equipped. The ships contained the most powerful space borne sensor arrays of their time, including eighteen modular sensor pallets for mission specific equipment. Twenty eight large dedicated laboratory facilities are included in the ship, along with facilities to convert three of the cargo bays to hold extra scientific equipment if necessary. This gave the Ambassador an estimated 450% increase in research capabilities over an Excelsior class vessel.
While the primary purpose of a starship is exploratory and scientific, the Ambassadors also have teeth. The class introduced phaser arrays to Starfleet in place of the ball turret phasers carried by previous designs. This measure greatly increased the ability of the Ambassador class to fire sustained bursts, and greatly reduced the recharge and cool down times. The use of an independent power system for every group of ten emitter segments in the array triples the survivability of the array compared to a ball turret, while there are also benefits to the reaction time, greater control of thermal effects, field halos and target impact. Overall the phaser arrays of the Ambassador are over 65% more effective than ball turrets of similar power. The concept of burst firing photon torpedoes was another first; although fitted with the same number of torpedo tubes as the Excelsior class, the Ambassadors ability to fire five torpedoes at a time from each tube effectively gave her ten tubes in place of two.
After the first batch of Ambassadors was delivered, Starfleet requested a series of modifications for the second batch. The USS Yamaguchi pioneered these changes. The engineering hulls aft end was widened to allow the shuttle bay to be enlarged, and a third shuttle bay was added to the underside of the engineering hull. This allowed the Yamaguchi to handle over 30% more shuttle craft than the standard Ambassador, making the ship more effective in colony establishment and support operations or emergency evacuation scenarios.
The siting of the Ambassadors saucer forward on the neck had led to some structural problems with early members of the class. Although these had largely been fixed by modifications to the structural integrity field, the changes had led to considerable complication of the layout of the ships connecting neck structures. Starfleet took the opportunity to shift the Yamaguchis saucer section back by six metres, allowing them to eliminate return to the original SIF modification without further difficulties. The nacelles were also shifted back in order to keep them at minimum safe distance from the saucer. The bussard collectors are a different model on the Yamaguchi, with a cap on the top and bottom of the inlet system which allows a less turbulent flow into the collectors, so increasing their efficiency by 12%.
The deflector dish was modified to allow more sensor systems to be installed, and to provide additional protection at high warp speeds. Additional sensor systems were installed in the main sensor dome on the saucer section, necessitating a housing to be installed between the dome and the hull to hold the extra equipment. This allowed the sensor range and sensitivity to be increased by over 20% compared to the original Ambassador. The layout of lifeboats within the saucer section was also modified to allow increased evacuation speed in an emergency.
Perhaps the most important change was the installation of a new model of impulse engine. The original Ambassadors had always been considered to have low speed and agility at impulse and the new engines provided almost 30% greater thrust, largely correcting this problem. The only exterior change caused by this alteration is that the engine exhaust is red rather than blue.
The Yamaguchi subtype proved highly successful in service, and all existing vessels began to upgrade to this standard from 2350. The only ship which was not so refitted was the USS Enterprise-C, which was destroyed in 2346 while defending a Klingon outpost from attack by the Romulans. The action secured peace between the Federation and the Klingon Empire. The ships destruction came some six months before it was due to return to Spacedock for modification.
The USS Ambassador was launched in 2330 and commissioned in 2332. Series production continued at a slow but steady pace until 2357, when the sixty eighth vessel was launched. Production was then suspended in favour of the new Galaxy class.
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