The Sublight Battleship Israel is a parasite craft for the Planetoid Imperial Terra.

It represents the capabilities of any given Fifth Imperium Sublight Battleship.

Some feats come from different "eras" from least to most technologically advanced Fourth Imperium < Fourth Empire < Fifth Imperium.

Fourth Imperium feats will be marked [/4I]

Forth Empire Feats will be marked [/E]

Fifth Imperium feats will be marked [/5I]

Weapons

Missiles

• [High Yield/4I] High yield gravitonic missiles can destroy planets and damage some stars.

• [Medium High Yield/E] 16 Gravitonic Warheads destroy Iapetus, one of Saturn's moons.

  • For reference, Iapetus has a GBE of 1.7e26 joules or around 42 petatons of TNT.

• [Medium Yield/E] Medium yield warheads (anti-matter) are in the gigaton range.

• [Low Yield/4I] A Planetoid's Point defense missiles are in the megaton range.

  • NOTE: The above feats are from Planetoids it is possible they don't apply to what a Sublight Battleship might carry.

• [Super High Yield/5I] Next generation gravitonic warheads are capable of causing supernovas and destroying every celestial body within around a light second of the detonation. Though it is unknown if Dahak ever gets equipped with these.

  • This kind of gravitonic warhead is fairly small, so would be easily possible for a Battleship to carry them. Though in setting they were very new and not in production yet.

• [Firepower/4I] Achuultani warheads are at least as big as anything Earth's defenders have (in this case it is probably referring to a fleet of 4th Imperium Sublight Battleships, Cruisers and Destroyers.

  • Achuultani antimatter warheads are often in the gigaton range.

• [Firepower/5I] Capable of destroying a Fourth Empire base even if they miss by 50 kilometers (this base is not shielded).

• [Salvo Size/5I] Able to fire salvos of at least twelve hypermissiles.

• [Hypermissile Range/E] Empire hypermissiles have an effective range of ~38 light minutes against a 120,000 ton sublight battleship.

• [FTL Velocity/E] 4th Empire hypermissiles are said to have a velocity of 4000c

  • NOTE: I think this is a case of Weber doing the math wrong, 4000c for 7 seconds would mean the missile is traveling 7.8 light hours which is far higher than the stated range which gets mentioned a few paragraphs earlier (see the previous feat before the velocity one). The missile's velocity to make the 7 seconds travel time is more one the order of 200-300c.

• [STL Velocity/5I] It's STL missiles have a velocity of .8c)

• [Atmosphere/5I] Unlike fighters Battleships are able to accurately launch Hypermissiles from within a planet's atmosphere.

Energy Weapons

• [Power/4I] Synchronized energy weapon fire can kill Achuultani ships which have stronger shields than 4th Imperium Sublight Battleships.

• [Power/4I] A Fourth Imperium battleship's energy weapons can sheer the top 300 meters off the top of a mountain.

Maneuverability

• [Manuverability/5I] It's drive field allows for "unlimited maneuverability" but not quite instant acceleration because drive counters mass and inertia.

• [Acceleration/5I] During an emergency launch make it up to .2c by the time it exits the Planetoid.

• [Acceleration/5I] Can accelerate from 0 to 60%c in 11 seconds with a damaged drive. For reference this is enough acceleration to make it from the Earth to the moon in 7 seconds from a "standing" start.

Defenses

• [Shields/5I] The Israel makes two layers of shields and it takes a number of hypermissiles from a old Fourth Empire defense system. Some of these missiles detonated underneath the first layer but none were direct hits to the hull.

• [Shields/4I] Battleships is capable of withstanding a few Achuultani antimatter warheads before being destroyed.

  • Achuultani antimatter warheads are often in the gigaton range.

• [Armor/5I] Are said to be able to easily tank nukes (probably referring to 20th/21st century nukes not Imperial nukes).

• [Armor/5I] Would be fine with hitting a Earth-like planet's atmosphere at 20,000 kps (6.7% c). Keep in mind the total kinetic energy they would be eating from this each second is

• [Damage Control/5I] They have computer/human controlled damage control systems which can be operated in the midst of battle.

• [Damage Control/5I] Damage control robots.

• [Damage Control/5I] Takes three weeks to repair a moderate level of damage.

• [Drive Field/5I] The Sublight Battleship Israel's drive field tears a path through a Planetoid during an emergency launch.

• [Stealth/5I] Uses stealth fields to escape a automated system's target lock (though to be fair this system is... not very good).

• [Stealth/5I] Aren't detected by Fourth Empire passive sensors while under Stealth Fields at two light minutes (when they came in system without them they were detected at multiple light hours away. Also note from this that Stealth Fields degrade the effectiveness of Israel's sensors.

• [Stealth/5I] Stealth Fields can make things invisible to normal humans.

• [Stealth/4I] Stealth Fields can make things completely absorb incoming radiation.

• [ECM/5I] They have decoys that match it's emission signature in an attempt to draw enemy fire.

• [EW/4I] Like with planetoids they would have jamming systems to deal with passive/active homing missiles. This will also become more effective as they get data on their opponent's tracking systems.

• [Decoy Count/5I] They continuously deploy decoys for on the order of ten minutes so they have a pretty considerable .

• [Point Defense] Like with planetoids, they should have both energy weapon and counter missiles to use as point defense against incoming STL missiles and projectiles. Though as far as I can remember they never get explicitly mentioned.

Miscellaneous

• [Energy Signature/5I] Sean (the ship's acting captain) says it can radiate as much energy as a small star. This would be under normal operation.

• [Endurance/5I] Israel manges to maintain .6c for ~21 months.

• [Endurance/5I] Sublight Battleships have Bussard Collectors so they will never run out of fuel if they can maintain speeds greater than .3c.

• [Tractor Beams/4I] A Fourth Imperium battleship has tractor beams that can lift "megaton" masses of mountain.

• [Crew Enhancement/4I] The ships crew would be enhanced so that they have at least three times better reaction time, eight times stronger, considerably more durable, enhanced senses, a life expectancy of ~5793 years and the ability to interface with Imperium technology.

• [Industrial Capacity/5I] Alters 2000 muskets to a more advanced standardized version in one night.

  • They later convert 26,000 muskets over an unknown time frame.

• [Industrial Capacity/Limit/5I] With only limited on board resources it probably wouldn't have been able to simply built the rifles (think like Civil War-era) for a small army.

• [Cartography/5I] Can make highly detailed maps.

• [Weather Prediction]Have software which can do meteorological predictions and the hardware to get the necessary data (though they aren't perfect).

• [Medical/5I] They are equipped with a medbay which can deal with some fairly serious injuries if they are treated in time.

• [Medical/5I] They have enough Medical supplies to save hundreds of people whom otherwise would have died (keep in mind 99% of the medical personnel in this aren't exactly up to modern par either).

• [Fighters/4I] Is capable of carrying at least eight fighters.

• [Fighters/5I] Though a mission loadout dedicated for long term survival only had 3.

• [Crew Requirement] Fourth Imperium Battleships required ~300 crew, Fourth Empire Battleships needed >100 and Fifth Imperium Battleships only need 30.

• [Optical Sensors/5I] Are able to see structures built by a primitive human civilization at two light minutes (before this they were under a stealth field so optical sensors wouldn't have worked).

• [Sensors/5I] A Sublight Battleship's active sensors cannot detect things at ~4 light days. Though passive sensors can find planets and their atmospheric composition.

• [Sensors/5I] A Sublight Battleship can't detect nothing smaller than a planetoid at much above ten light-hours unless it has an active emissions signature (note: this would be referring to stuff like ships).

• [Sensors/5I] A Sublight Battleship is able to detect energy sources at at least 28 light minutes.

• [Sensor Drones/5I] Is equipped with stealthed remote sensor drones.

• [Sensor Drones/5I] Have satellites which can be put into orbit to monitor ground forces/conditions.

• [Sensor Drones/5I] Watches a group of villagers without them knowing.

• [Sensor Drones/Language Learning/5I] Sensor Drones that can fit on top of a beam and the Ship's computer is able begin learning an entirely new language over the course of a month.