GDI Combat Doctrine emphasized the use of combined arms of a resilient frontline with mobile specialists that cover each other's weaknesses. This doctrine is kept in mind when designing the GDI Navy. However the limited supply of eezo in the Sol system during the early stages of development influences how the navy grew. Along with future plans of colonizing other systems after the Charon Relay was founded, influenced the Navy to maximize the quantity of vessels until a large supply of eezo could be founded. Eezo Research Labs are given a priority to create light and efficient drive cores, due to how eezo requirements increase exponentially the more mass the vessel has.
Thus GDI's navy are organized into 3 Branches, each with a different role and requirement. The Home Branch is the Reserve Fleet, where the most dated and most advanced ship are held in reserve, ready to respond to any nearby conflict. The Interstitial Branch is the Police Fleet, they patrol GDI colonies and protect freighters from pirates. The Exploration Branch is the Expeditionary Fleet, it is the smallest branch but contain our most advanced and powerful vessels that can be sent out to explore.
The GDI Navy mostly composed of Corvettes, Frigates, and Destroyers. These vessels are spread out among the Home Branch, Interstitial Branch, and the Exploration Branch. Cruisers are less common, but are exclusive to the Home and Exploration Branch. Battlecruisers and Carriers are exclusive to Home Branch but can be loaned out to the Exploration Branch to create a Counterattack Fleet.
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- GDN Carter class Corvette: A 100-meter craft with a 60-man crew. It is equipped with a Gorgon Laser Cannon, 6 Viper MLRS, a Crystal Shield system, Oculus Sensor system, and Metallic Foam Armor Plating. Using the combined research of GDI and reversed engineered Nod technology, Future Tech developed the Gorgon Laser Cannon. The Gorgon fires a continuous beam that gets stronger the longer it it locks on to a target similar to GDI's Focus Beam, this is combined with Nod's Obelisk frame allows the Gorgon to lock on to target with only a small module at the nose of the Corvette instead of a large turret of the GDI Focus Beam.
The Gorgon system coupled with the Oculus Sensor system, GDI's most sophisticated naval sensor that can provide target acquisition, target identification, and 3D target tracking data to the EVA Module house in the Corvette, where it is processed and sent to the Gorgon Laser System. The Gorgon is capable of modifying its output and be precise enough to target enemy Strike Craft and Precision Guided Munitions while also be able to burn a hole on the hull enemy ships if left alone for too long. Multiple Carters can work together by linking their EVA units and have them focus their Gorgon's on a single target to devastating effect. The Oculus sensors are precise enough for survey and patrol work, resulting in the Carter being the most common vessel in GDI's arsenal for a relatively cheap cost.
The main drawback of the Gorgon however is the enormous amount of power required and the waste heat generated by the system. This results in little space in the energy budget for an FTL drive and more sophisticated equipment. Thus GDI returned to tried and tested technology to compensate. The Viper MLRS are meant as a low energy cost secondary armament, in case the Gorgon is overwhelmed with target, the Vipers release volleys of precision missiles that can intercept enemy Strike Craft and Naval grade Munitions. Each Viper contains a pod of 60 Missiles.
For defense, the Corvette uses the Crystal Shield System, a last generation shield system similar to the one used during the Ascension Conflict except improved to be more powerful and energy efficient at the cost of the Stasis Module. Metallic Foam Armor Plating is an old technology but its relatively high amount of protection for its mass against both ballistic and energy based weapons makes it the ideal armor plating for the Corvette especially when used with MEF forged alloys. To increase the battlefield stamina of the Corvette due to heat build up, a Heat Sink system has been installed that can be ejected should it reach capacity and replaced with a spare heat sink. The Corvette's main role is to survey, patrol, and support the Navy larger ships, they are the Infantry of the GDI Navy. GDI Corvettes are named after GDI Soldiers.
- GDN Andrews-Class Frigate: A 300-meter craft with a 200 man crew. It is equipped with a Sword Ion Cannon, 6 Dagger Ion Cannon Turrets, Aegis Firestorm Shield, and Metallic Foam Armor Plating. Over the years, GDI have further improved their Ion Cannon technology. The one used in the Andrews-Class Frigate is the latest 'Light' Ion Cannon, the Sword. Optimized for firing speed, the Sword can shoot a blast every 6 seconds with the power of a 1st generation Ion Cannon. The Sword achieves this rate of fire by having built in capacitors that can store up to 6 charges when the Ion Cannon is not in use. Recharging a capacitor requires a 10 second charge and 60 seconds is required to recharge the whole bank of capacitors.
A fairly powerful weapon, however Ion Cannons lose their charge the farther away the target is due to the particle beam diffusing itself. Thus it is recommended to be used in knife-fighting range, under 200,000 kilometers. The Sword could also function as ground support weapon to precisely take out enemies tagged by friendly units on the ground with minimal collateral damage as the Sword has variable settings.
To defend itself against strike craft, the Andrews have 6 Dagger Ion Cannon Batteries that can be used to intercept incoming torpedoes or enemy strike craft. It has a fairly slow rate of fire, about a shot every 4 seconds, but packs the punch of a Vehicle grade Ion Cannon. The Aegis Shield is GDI's latest naval shield system, the Aegis can temporarily put the ship in Stasis, making it invulnerable to attack for several seconds before needing a 3 minute recharge, even longer if it is in the middle of combat. However making yourself immune to damage for even a brief period could mean the difference between life and death. The Frigate's main role is to close in on enemy vessels and blast them with its Ion Cannons, they are the main battle tanks of the GDI Navy. GDI Frigates are named after famous battles.
- GDN Maus-Class Destroyer: A 350-meter craft with a 300 man crew. It is equipped with 2 Archer Torpedo Launchers, EVA EWar Module, 12 Viper MLRS, Aegis Shield, and Refractor Plating. With the Frigates slated to be the meat of the fleet, a support vessel was proposed to cover for any of the Frigate's weaknesses. Armed with Archer Torpedoes, each torpedo uses shaped charge to create a jet of molten metal into enemy ships on impact. Before launch, each Archer is given a Mirror Coating to increase its resistance to energy based countermeasures by refracting a majority of the energy away from the torpedo.
It's main defensive armament of 12 Viper MLRS can quickly eliminate enemy strike craft by weight of numbers with each missile being guided by the Maus's EVA unit. The EVA Electronic Warfare Module contain a gamut of ECM and ECCM equipment with the purpose of making it difficult for the enemy to get a lock on the fleet or to jam enemy guided munitions. Along with the Aegis, the Maus is also armored in Mirror Armor, the same armor used in the Refractor. This plating does severely increase the mass of the Maus and thus required a larger Eezo core and more energy to power the larger core.
With a larger FTL Drive, the EVA EWar Module, and Refractor Plating, the Maus does not have the energy to spare for Ion Cannons or Railguns and thus must settle for Missile and Torpedo weapons in exchange for being very hard to kill. It is also very expensive to field and maintain and thus only a small number of them are in service in the Exploration Branch with a couple in the Home branch in reserve. The role of the Destroyers are to provide indirect support through EWar, an additional source of missile countermeasures, or launch torpedoes on wounded enemy ships as a killing blow. GDI Destroyers are named after GDI Intelligence Officers.
- GDN Rome-Class Cruiser: A 600 meter craft with an 600 man crew. It is equipped with 2 Savior Ionized Spinal Railguns, 8 Viper MLRS, 4 Dagger Ion Cannons Turrets, Aegis Shields, Metallic Foam Armor Plating, Adaptive Armor System, and Railgun Accelerator System. Instead of having an Ion Cannon as a main weapon, the Rome-class Cruisers are armed with Ionized Spinal mounted Railguns. While it does not have the same destructive power of an equivalent sized Ion Cannon it can retain that destructive power over a longer distance, unlike the Ion Cannon. To compensate, the Rome is armed with 2 Savior Railguns. Capable of firing a shot every 4 seconds, the Savior Railguns are an incredibly deadly weapon.
The GDN Cruisers are designed to be the Mammoth Tank of the GDI Navy, tough while carrying lots of firepower. To increase it's toughness and firepower, GDI designers look to the past for inspiration. The Steel Talon's Adaptive Armor and Railgun Accelerator systems have been adapted for use in the Rome-Class Cruiser.
On defense the Rome can activate Adaptive Armor, increasing its defense at the cost of rate of fire. However on the offense, the Rome can activate its Railgun Accelerator and increase its Railguns' rate of fire to an absurd degree of a shot every second for each Railgun at the cost of quickly wearing down the Railgun and requiring time at a ship yard for maintenance
Overall, with its powerful main weapon, the various defensive systems, the Rome would be an immovable wall that is back bone of the GDN fleet. The Rome class is currently in the service of the Exploration Branch however 1/3 of their number are stationed in the Home Branch on major worlds. GDN Cruisers are named after Earth Cities.
- GDN Solomon-class Carriers: A 1 kilometer craft with a 5,500 man crew. It is equipped with an Internal Hangar Bay, a Magnetic Catapult, 80 F/A Firehawk 4s & other auxiliary space craft, 20 Dagger Ion Cannon Turrets, EVA Command Unit, 28 Viper MLRS, Orbital Drop Pod Launchers, Aegis Shields, Metallic Foam Armor Plating, and Adaptive Armor. Designed like its class would suggest, to be a mobile base of operations for any military conflict requiring large amounts of GDI assets. With it's main armaments being the strike craft inside it's hull, the new and improved F/A Firehawk 4. With an improved Brain-to-Machine Interface of the 1st Firehawk, Crystal shielding, advanced cloaking ability, a Rotary Ionized Coilgun, and a variety of GDI explosive payloads makes this version of the Firehawk the deadliest strike craft in GDI's arsenal.
To ready its air wing for launch, multiple elevators carry the strike craft from inside the hull to the surface, where it is then catapulted at high speed using the Carrier's magnetic catapult. The bridge is nestled deep inside the Carrier and it is there that the command staff and an EVA Command unit oversee the operation. There is a 2nd EVA unit that is responsible for making sure everything on board the Carrier is running smoothly, from refueling and rearming returning strike craft, being on the look out for enemy strike craft and shoot it down when necessary, or coordinating with other EVA units among the fleet.
A feature that no other vessel have is an Orbital Drop Pod Launcher, using the designs for the GST's Orbital Drop unit, it can drop an entire Battalion of Troops or vehicles into the middle of combat. A dozen drop pods unloading an army of Mammoth Tanks is an intimidating sight to see, and once the drop pods has touched down, it detaches its floor to release its cargo while immediately launching itself back into orbit to be reused. Each Solomon also have an MCV in storage along with the materials necessary to build a forward base on an enemy planet in minutes.
The Solomon is incredible expensive to build and only 1 of them are currently in service with another on the way thanks to the colony of Galcad's natural Ezo deposits, colonized in the 2nd Colonization wave of 2130. The role of the Solomon is to provide versatile Long-range support in the form of strike craft and transporting the GDI Army in any offensive campaign. GDN Carriers are named after famous GDI Leaders.
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AN: This Informational got away from me as I kept adding more stuff in while I was typing it. I didn't notice that the Carter is basically a Protoss Void Ray until I started typing the MLRS system. Yes the MFAP sounds funny, no I did not intend for that to happen. The Andrews's Ion Cannon is based on the same Ion Cannon used by Zone Captains but with improved firepower. Yes, GDI doesn't have Dreadnoughts cause they spent a majority of their ezo on Frigates and Corvettes to patrol the every growing GDI border. They have plans sure but nothing other than blueprints.
I did have a plan for a Battlecruiser that was built around a spinal Ion Cannon that can almost 1 shot a Cruiser with 5 capacitors(magazine) and a 20 second recharge time for each capacitor but it was meant to lead the charge and blast enemy capital ships, but since it is an Ion Cannon, the Battlecruiser needs to get fairly close to the enemy. Requiring the Battlecruiser to close in at Short range while the Cruisers are capable of hitting enemies at medium and half-way into long range, while Frigates and Corvettes are only able to fight in Knife-fight range.
The Vipers are basically AM-RAM missiles and Daggers are Ion Cannon's for tanks slapped on to a ship for one shot-ing Stormriders and PAC's drones. The Ion Cannons and Railguns are for fighting Scrin Devastators and PACs. Galcad is from The Outsider's Comprehensive Guide to Human Affairs by Kajhe on Fanfiction.net that a friend of mine found for me.