Just take the template and make something up.
Example Template:
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UNSC Scarlett-Class Heavy Frigate
Designation: Scarlett-Class
Role: Heavy Frigate
Weapon Systems:
Primary Armament: 2x Heavy Plasma-Coated Magnetic Accelerator Cannons (850 Tonne Rounds),
Secondary Armament: 1x CR-23 Energy Projection Systems,
Tertiary Armament: M98 Castle Missile System (88 Launch Pods x 58 Missiles),
Quaternary Armament: 62x Mark 2851 Portable Magnetic Accelerator Cannons.
Defence Measures:
Armour: Forerunner Armour Laced Titanium-A7 Battleplate Armour (1050cm).
Shielding: Multi-Layered Form Fitting Hard-Light Shielding
UNSC Tertiary: EMERGENCY UNSC USE ONLY: Emergency Hard Light Shield Emitters Located around Command Deck View Ports and Weapon Emplacements
Point Defence Grids: Quad-Linked 85mm Gauss Gatling Cannons, M72 Grindell/Galilean Nonlinear Cannons, Hard Light Barrier Emitters (A/N: Solid Walls to detonate Munitions)
Specifications and Engines:
Complement: 338 Sailors, 1 Smart A.I and 3 Dumb A.I (1x Slipspace Calculations, 1x Firing Solutions and 1x Damage Control), 300 Marines and 45 Orbital Drop Shock Troopers, Ground Vehicles: 6x M860 Red Wolves, 16x M70 FAV Wolfhounds. Aircraft: 18x F-52/HSF Falchion Fighters, 6x F-52/HFB Gurkha Fighter-Bombers.
Length: 2,275FT (693.6M)
Beam: 637FT (194.4M)
Height: 902FT (274.9M)
Engine: 7x XR18 Boglin Fields: S729/S-DFR’s
Vessel History: The Violet-Class Heavy Frigates were part of an UNSC Navy Initiative to rebuild Naval strength quickly to secure the Border with Storm and Sword of Sanghelios Forces. The initial designs were accepted on the basis of being able to fire all weapons without having a serious drain on the rest of the ship systems. having passed UNSC Tests with flying colours, they ordered them in the thousands with all ship yards being configured to build the first order. UNSC Technicians decided to expand upon the Frigate Designs by changing the “colours” to make new classes. The Scarlett-Class is the most advanced Heavy Frigate in the UNSC’s inventory.
Empty Template:
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UNSC
Designation: -Class
Role:
Weapon Systems:
Primary Armament:
Secondary Armament:
Tertiary Armament:
Quaternary Armament:
Defence Measures:
Armour:
Shielding:
UNSC Tertiary:
Point Defence Grids:
Specifications and Engines:
Complement:
Ground Vehicles:
Aircraft:
Length: FT (M)
Beam: FT (M)
Height: FT (M)
Engine:
Vessel History: