Terminology

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A lookup-sheet for many of the terms commonly used by From the Depths' community.

General[edit | edit source]

  • CC: Custom Campaigns
  • Tetris: Placement of components within a certain space for maximum efficiency. Most commonly components of one subsystem.
  • Spam: The practical implementation of the belief that "If X doesn't fix the problem, you need to use more X". This is most obvious in the context of weaponry (e.g. encountering an enemy which is almost immune to lasers, and fixing this problem by using five times more lasers than usual), and in terms of the number of vehicles sent into a battle, but is also available in more subtle flavours such as using one hundred and thirty eight prefabricated torpedo boat engines to drive a battleship.

Hulls[edit | edit source]

  • V-hull/U-hull/box-hull: Refers to the crossection when looking from front/back.
    • V-hulls are generally built using 4m beam slopes and triangle corners, and because of this they are more likely to cause shots to bounce off, and may also experience less drag. Unfortunately this triangular hull shape also offers the lowest posible ratio of volume to surface area, meaning that you'll get to invest a lot of materials into a hull that offers relatively little internal space for weapons and machinery.
    • U-hulls are an in-between concept seeking to optimize internal volume for any given surface area. Their primary advantage over the V-hull is that they are typically flat-bottomed along the centreline which simplifies the fitting of prefabricated engines and weapons into the hull. In terms of armour, their beam is at its widest at the wateline, which provides ample space for side armour, but protection weakens towards the bottom as the sides begin to curve inwards toward the keel. As kinetic shells and laser beams rapidly lose their destructive potential when moving through water, this lack of protection near the bottom of the hull may be acceptable, through torpedo resistance may be insufficient.
    • Box-hulls are the most easily armoured, consisting of a simple bottom plate with two thick walls of armour running along the edges and an armoured deck closing off the top. They also easily accommodate prefabricated modules, but the simplicity of their design may come off as aesthetically off-putting, occasionally giving the impression of being a "vaguely ship-shaped brick".
  • Bow/Fore: Refers to the front of the ship
  • Aft/Stern: Refers to the rear of the ship
  • Weather deck: Refers to the upper most deck, that which takes the waves and bad weather.
  • Deck: If a boat was a house, decks would be its floors.
  • Bulkhead: If a boat was a house, bulkheads would be its walls.
  • Tumblehome: Hulls that get narrower above the waterline, to resemble a /_\ shape.
  • Beam: Designates the width of a hull, generally at its widest, having a wider boat makes it more stable with regards to roll.
  • Freeboard: Designates the height of the part of the hull that is above the waterline, having low water line is unrealistic and makes your boat prone to sink more easily when damaged, however it also makes it less prone to capsizing as it makes it less top heavy.
  • Draught (Draft): Designates the height of the part of the hull that is bellow the waterline, the part of a ship which is most vulnerable to torpedoes.
  • Sheer: Refers to the angle at which the bow of a ship elevates, most noticeable from a side view.
  • Flare: Refers to how the bow of the ship gets wider as it goes from the waterline to the weather deck, giving it a \/ shape. More often, giving it an exponential curve looks the best, it can be referred as the opposite of trumblehome.
  • Keel: The name of the bottom of a hull.
  • Compartmentalization: Refers to the way compartiments are made in a ship, placement of bulkheads and decks; it becomes important if you want to optimise the floatability and durability of a ship, alongside the armor scheme.
  • Spinblock Sheering: Designates a method using a couple of spinblocks to create a smoother sheer than when using slopes witout spinblocks.
  • Slope Staggering: Designates a method that consists of staggering slopes of a certain sizes with certain staggers at the bow or aft of a ship in order to have a smooth and good looking bow/aft shape.

Weapons[edit | edit source]

  • APHE: Armor piercing High Explosive, a CRAM or APS shell designed to penetrate armor, and explode on the inside, shells with other damage types may have HE substituted, such as APFrag
  • APS: Advanced Projectile System, once referred to as Advanced Cannons
  • Dakka: Firepower. Sometimes limited to high firerate, and/or cannons. Direct reference to the Orks from Warhammer 40k.
  • HEAT: High Explosive Anti Tank, it refers to a missile or APS shell with a shaped charge warhead, regardless of weather its intended target is a tank.
  • LAMS: Laser Anti Munition System (was once Laser Anti Missile System)
  • Noodle-Barrel: Excessively long barrel for Advanced Cannons, or more rarely CRAM Cannons.
  • PAC: Particle Accelerator Cannon
  • VLS: Vertically launched missiles, typically using a one-turn module to steer themselves onto the proper course to target after launch.

Turrets[edit | edit source]

  • Barbette: A somewhat cylindrical armoured structure built into a vehicle's hull to protect the "neck" of a turret. Whereas the neck is part of the turret construct, the barbette is a part of the vehicle's hull and thus the barbette armour does not slow down the rotation speed of the turret.
  • Cap: The lump of armour blocks which protects the firing piece of a gun turret. Also known as a Gun House.
  • Decapitation: A term referring to what happens when a turret's "neck" is destroyed, separating the "cap" from the rest of the turret. Typically caused by improper armouring of the neck and/or barbette.
  • Neck: A relatively narrow structure containing CRAM connectors or APS Gauge increasers/coolers, which connect the "tetris" inside the vehicle or fortress' hull to the "cap" outside the hull.
  • Superfiring: A term describing a turret which has had its neck and corresponding barbette extended so that it can fire over the cap of another turret.

Commonly Used Ship Designations[edit | edit source]

Most are using the standard USN designations

Ordered by approximate size.

Aircraft Carriers[edit | edit source]

Hull Symbol Designation Description
CV Fleet Carrier A cruiser-style hull fitted with a large flat flight deck for launching fighters and light bombers.
CVE Escort Carrier A carrier built from some kind of cargo vessel. Not a bad idea since a cargo ship will likely have enough space to fit the ammo and fuel storage needed to resupply a small airgroup. It might not be as fast as a proper fleet carrier though, and you may find that the weight of the flight deck hurts its seakeeping qualities.
CVS ASW Carrier A carrier fitted for ASW duties. This usually means a lot of torpedo bombers, cram bombers, magnetic mine bombers, and heavy anti-torpedo and anti-missile defences. Traditionally, ASW carriers also employed a fairly large number of helicopters.

Surface Combatants[edit | edit source]

Hull Symbol Designation Description
BB Battleship Carrying the heaviest guns in the fleet, and built to take a punch and keep going at a steady -though not exactly rapid- pace, a battleship is a floating fortress of a ship, although the later Fast Battleships increased the speed somewhat (at some cost to their maneuverability).
CB/CC Battlecruiser Evolved from the Armoured Cruiser, battlecruisers are traditionally of either the English or the German variety. Both feature higher speeds than a battleship, but the former sacrifices armour in favour of carrying battleship-grade weapons while the latter offers near-battleship armour at the cost of slightly lighter armament.

Eventually a third type evolved, which favoured increasing the waterline length and displacement instead of sacrificing protection or firepower. This third type causes some confusion as to the origin of the term "Fast Battleship".

CA (Early) Armoured Cruiser Featuring both a waterline armour belt and the Protected Cruiser's angled internal belt and protective coal bunkers, an Armoured Cruiser was typically similar in length to the battleships of the day, but with a narrower beam, higher speed, and lighter weapons, their main armament typically being similar to the secondary armament of a battleship.

This classification was also bestowed upon the Deutschland-class of Panzerschiffe built by the German navy in 1929-1936 for use as commerce raiders, although their heavy armament granted them the unoficcial designation of "Pocket Battleships" by the british.

CA (Late) Heavy Cruiser An evolution of the Light Armoured Cruiser, the Heavy Cruiser was defined by the London Naval Treaty as having a main gun caliber no larger than 203mm.

In FTD terms this might mean a gun armament slightly favouring hitting power over rate of fire and shell speed.

CL Light Armoured Cruiser An evolution of the Protected Cruiser, the advent of oil-fired boilers made storing fuel along the ship's side for protection a questionable idea, and so Light Armoured Cruisers had a simpler armour scheme consisting of a vertical waterline belt attached to the sides of the hull, and a flat armoured deck. Eventually the London Naval Treaty redefined the "Light Cruiser" as having a main gun caliber of no more than 155mm.

In FTD terms, this might mean a gun armament with a bias towards fighting agile, perhaps aerial, targets with a high rate of fire and/or shell speed at the cost of hitting power.

C Cruiser (Protected) These gun-armed ocean-going vessels are fairly fast, but lightly protected. Their armour protection typically consisted of a single armoured deck, the sides of which were extended downward below the waterline to form a sort of angular upside-down bowl-shape that protected (ahem) the ship's boilers, engines, and ammunition stores. In addition to the sloped internal belt, the ship's waterline was also protected (ahem) by storing the fuel supply (coal) in the triangular space between the sloped armoured belt, the ship's side, and the deck above.

Their main gun armament is heavy enough that they typically use two or even three different sizes of guns, the main battery being made for heavy anti-ship use, and the secondary and tertiary batteries being successively lighter and increasingly optimized for use against Torpedo Boats, Motor Torpedo Boats, and other small, fast targets.

DD Destroyer Ocean-going torpedo-boat with a secondary gun armament for destroying other torpedo boats as well as other targets of opportinity.

Later advancements included dual-purpose guns, and eventually replacing some (or all) of their torpedo armament with anti-ship missiles.

FF (Post-WWII) Frigate Also referred to by the US Navy as a Destroyer Escort (DE) during the cold war, these were large dedicated high-endurance anti-submarine vessels with a secondary anti-aircraft role, and were used as convoy escorts.
FS Corvette Small ASW ship intended for convoy defence and patrolling coastal waters. Expected to be shielded from air and surface attack by friendly land- or carrier-based air cover or by larger friendly ships, they're liable to lose a fight against a gunboat
PG Gunboat A long-range patrol vessel intended to roam foreign coastal waters independently of the main fleet. Typically armed with two or more medium-sized guns for coastal bombardment and anti-surface work and a few light anti-aircraft weapons, larger models may even carry torpedoes.
PM Missile Boat Though small and fragile, these boats are cheap enough to be used in swarms, and they pack a mean punch! In addition to their missiles, they typically also carry some kind of autocannon, possibly a dual-purpose (DP) gun. Advanced models may also carry a CIWS, and the largest may even be fitted with a light SAM system.
PT Torpedo Boat Small high-speed coastal vessel intended for use in swarm attacks. They were/are mainly intended to prey upon large and unmaneuverable opponents such as battleships, carriers, and cruisers, and the occasional cargo ship. The may also useful as cheap reconnaissance craft, but are all but uncontrollable in rough seas.

Submarines[edit | edit source]

Hull Symbol Designation Description
SS Attack Submarine An underwater counterpart to the destroyer, the attack submarine preys upon surface vessels and other submarines alike, mainly relying on torpedoes to punch holes in the enemy's hull. While perhaps less interesting than SSBs or SSGs, attack submarines may be better suited for fighting other submarines.
SSB Submarine;

Ballistic Missile

Mainly intended to attack surface vessels and ground targets, ballistic missile submarines in FtD typically either carry subvehicles with Tactical Nukes, or use vertically launched Large Missiles. The large missiles, in this case, may have a very slow turn rate or guidance delays to strike the enemy from above.
SSC Submarine;

Coastal

Similar to the Attack Submarine in purpose, coastal submarines operate in shallower waters where enemy craft have an easier time attacking them with CRAM and APS mortars, magnetic mines, and the like. As such, coastal submarines tend towards smaller size to decrease the risk of detection, as well as having greater maneuverability to navigate in confined waters.
SSG Submarine;

Guided Missile

Similar to the SSB in execution, SSGs typically forego the expensive complexities of trying to bring heavy firepower onto an enemy's deck from above. Instead, their missiles go straight to the target, hitting their sides without unnecessary complications.
SSM Midget Submarine A tiny submarine, perfect for sneaking up close to enemy vessels and capturing them. Alternatively, you could fit the SSM with an inter-vehicle transmitter and use it to provide targeting data for other ships. A third option is to mount a Missile Controller with a Laser emitter on a mast and use the boat to mark targets for long-range Laser-homing missiles launched by other vessels.

Support vessels[edit | edit source]

Hull Symbol Designation Description
AC Collier Because FtD's steam boilers burn plain old materials rather than coal, there's no need for colliers. Of course, that doesn't stop anyone from building some of their cargo ships to look like colliers and designate them accordingly.
AE Ammunition Ship Potentially a more dangerous assignment than being on the front lines, ammunition ships carry ammo from production facilities to the combat units.
AGD Dredge Ship A ship fitted with equipment for removing material from resource zones on the sea.
AK Cargo ship Moving material from resource zones to fuel and ammo processing plants may not be a glamourous taks, but it's one that needs to be done. Of course, your repair ships on the fronlines will need to be resupplied sooner or later, so a cargo ship's carreer might not be entirely uneventful.
AO Oiler While it's perfectly acceptable to build every combat vehicle with enough fuel storage to travel across Neter and back on one tank, there's some merit to the idea of offloading some (or most) of a fleet's fuel onto a purpose-built oiler. For starters, it saves some space and weight on your combat crafts.
AR Repair Ship We've got Simple fuel processors and we've got refineries. We've got ammo processors and we're about to get ammo factories. At some point the repair tentacles may or may not be pushed aside by a more material-efficient multi-block construction system. Until we know for sure, there's no benefit to sailing your damaged craft all the way back to your fortress to patch up their battle scars, so go ahead and slap some repair tentacles on a spare hull and give your fleet some mobile repair capability!
AT Ocean Tug A small ship with a Docking Station, used to move around Ammo, Fuel, and Material barges.
ATF Fleet Ocean Tug As above, but used to tow damaged combat craft over to the nearest repair ship. Because these tugs may operate as part of a fleet, you way want them fitted with some light defensive weapons in case a stray enemy fighter decides to have a go at them.
YM Dredge Barge Like a dredge ship, the dredge barge collects materials from the sea floor, but it has a very limited (if any) propulsion system, which makes it cheaper to build.
YO Fuel Barge They're like oilers, but with no propulsion system, which makes them much cheaper. On the off hand, you'll need a tugboat to move them around.
YR Floating workshop. Like a repair ship, except it's just a cheap barge with a few repair tentacles, some material storage, and enough engine power and fuel to keep the tentacles working.

Extensions

  • -C: Extension meaning it's a coastal vessel, most notably used for coastal submarines (SSC).
  • -L: Extension meaning it's a lighter version of its original designation, most noticably used for CVL- Light aircraft carrier, which were smaller CVs carrying less planes and with a shorter naval range.
  • -V: Extension signifing the ship has aicraft carrying capacities while its class is not originaly intended to, generaly used for conversions (CAVs, BBVs, etc...).
  • -G: Extension signifing the ship uses missiles and/or guided missiles, came in during the cold war on most standard ship types, FFG, DDG, DEG, .
  • -N: Extension signifing the ship uses nuclear propulsion, came in during the cold war, used most notably for SSN- Nuclear powered submarines and CVN- nuclear powered aircraft carriers. Since nuclear ractors don't yet exist in FtD, we mostly use this extension for vehicles powered by RTGs.