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(Capital) Endeavour-class Battlecruiser

Iconic backbone of the Old Federal Navy's heavy strike capability. The most powerful warship fielded by the UTN Military. 1.5 KM long heavy warship weighing over a million Tons, Endeavours provided the heaviest available firepower.

Earth and Space
(Capital) Endeavour-class Battlecruiser

General Information

||CALLSIGN: 'Endeavour' / EDVR-CB-<series>

||OPERATORS: UTN Federal Navy (pre-4040 A.D), Terran Loyalist Navy (4042 A.D - 4299 A.D, S3A and S5A), United Aquarian Systems Navy (4299 A.D - Present, S5A and S6 only) Tiger Sharks Pirates (at least one S1/A as of 4068 A.D), TSRC Security Fleet (3718-4040 A.D)

||TYPE: Capital Ship - Battlecruiser

||CLASS: Endeavour

S1, S1A, S2, S2A, S2B, S3A: up to 1,500 enlisted personnel, up to 150 commissioned officers, up to 40 bridge staff and up to 400 Federal Marines

S4: up to 1,700 enlisted personnel, up to 160 commissioned officers, up to 40 bridge staff and up to 600 Federal Marines

S5A: < 600 enlisted personnel, < 80 commissioned officers, up to < 25 bridge staff and up to 150 Federal Marines
S6: [Classified]

||ORIGIN: A.R.A.S Shipyards Lorentis

||SPECIES OF ORIGIN: Human (Terran)


||STATUS: Variants in Active Service (Up to 4040 A.D In FN service, and 4042 - 4299 TLN Service)

||NUMBER BUILT: 181 (as of 4015 A.D), 18 S1, a further 12 S1 upgraded to S1A or S2/A standard. 38 S2/A, 25 S2B, 60 S3A, 8 S4, 20 S5A, [Unknown] S6

||VARIANTS: S1 (3617 A.D), S1A (3620 A.D), S2 (3646 A.D), S2A (3656 A.D), S2B (3705 A.D), S3A (3725 A.D), S4 (3825 A.D), S5A (4003 A.D), S6(exp) (4217 A.D)


S1, S1A, S2: up to 1275 M/s (impulse cruise), up to 1,541 KM/s (Hyper Cruise),
S2A, S2B, S3A, S4: up to 1380 M/s (impulse cruise), >1,541 KM/s (Hyper Cruise)
S5A: 1400+ M/s (impulse cruise), >1,600 KM/s (Hyper Cruise)
S6: [Unknown]

||MAX RANGE: S1, S1A, S2: Unlimited, 1 AU in > 185 Seconds Max Sub-Space
S2A, S2B, S3A, S4: Unlimited, 1 AU in > 130 Seconds Max Sub-Space S5A: Unlimited, 1 AU in < 125 Seconds Max Sub-Space S6: [Unknown]

S1, S1A: 1,117,650 T approx.
S2, S2A: 1,215,000 T approx.
S2B: 1,309,000 T approx.
S3A: 1,217,950 T approx.
S4: 1,517,375 T approx.
S5A: 1,100,600 T approx.

S1, S1A, S2, S2A, S2B, S3A: 250 metres (widest hull), 160 metres (thinnest hull), 530 metres (Sensor Towers) Approx. S4: 268 metres (widest hull), 179 metres (thinnest hull), 610 metres (Sensor Towers) Approx. S5A: 250 metres (widest hull), 160 metres (thinnest hull), 430 metres (Sensor Towers) Approx. S6: [Classified]

S1, S1A, S2, S2A, S2B, S3A, S5A: 1,490 metres approx.
S4: 1,510 metres approx.
S6: [Classified]

||HEIGHT: S1, S1A, S2, S2A, S2B, S3A: 160 metres (hull), 310 metres (conning tower) approx. S4: 194 metres (hull), 358 metres (conning tower) approx. S5A: 162 metres (hull) S6: [Classified]

||DOCKING FACILITIES: S1, S1A, S2, S2A, S2B, S3A, S4: Ventral Hangar: Up to two Escort Corvette-class vessels. Up to seven Gunship-class vessels, up to thirty-five strikecraft-class vessels. External Masts: Up to two Escort Corvette-class vessels, one on each port/starboard docking mast, for 'Piggy-backing' in Subspace jumps. S5A: Ventral Hangar: One Escort Corvette-class vessels. Up to six Gunship-class vessels, up to twenty-five strikecraft-class vessels. S6: [Classified]


S1, S1A, S2, S2A:
Six Rockal-Jasper N500 1500Mw Internal Fusion Reactors (main), twelve Rockal-Jasper L250 500Mw Internal Fusion Reactors (secondary)

​S2B, S3A [Changes from S1, S1A, S2, S2A]:
Main powerplant replaced with ArgunMK-VC 'Spiris' 2240MW Internal Helio-Barycentric Cold Fusion Reactors, secondary powerplant upgraded to Rockal-Jasper L350C 1000MW Internal Fusion Reactors

S4, S5A: [Changes from S2B, S3A]:
Secondary Powerplanet upgraded to twelve ArgunMK-VC 'Spiris-E' 1250MW Helium-Barycentric Cold Internal Fusion Reactors

S6: [Changes from S5A]:

S1, S1A, S2:
Single 30-stack FEX-12 Fusion Impulse Drives (main), dual-stack FEX-12 Fusion Impulse Drives (sub-primary), four 8-stack FEX-8 and four quad-stack FEX-8 Fusion Impulse Drives (Secondary), MKVII 'Jump Drive' Subspace Accelerator

S2A, S2B, S3A, S4 [Changes from S1, S1A, S2]:
Drives upgraded to FEX-12A standard.
Upgraded to MKVIII 'Jump Drive' Subspace Accelerator

S5A [Changes from S2A, S2B, S3A, S4]:
Primary Drives replaced with FEX-18E FID, Secondary drives replaced with FEX-10E FID
'PHANTOM' Reactionless Drive Package
Upgraded to MKVIX 'Jump Drive' Subspace Accelerator

S6 [Changes from S5A]:

S1, S1A:
"Ornatus" Tritanium Composite Alloy with Ablative Ceramic and Anti-DEW Reflective Subsurface, Osmium mesh-lattice. 9.1 metres thickness (main belt), 2.8 metres thickness (secondary belt), 0.8-1.2 metres thickness (tertiary belt)

S2, S2A, S2B [Changes from S1, S1A]:
Main belt increased to 10.5 metres thickness, secondary belt increased to 3 metres thickness, tertiary belt increased to 1.1-1.4 metres thickness (tertiary belt)

S3A [Changes from S2, S2A, S2B]:
All belts upgraded to"Ornatus-C" Tritanium/Polaryte-Iso Composite Alloy armour package, Main belt reduced to 9.8 metres thickness, secondary belt reduced to 2.2 metres, Tertiary belt reduced to 1.2-1.4 metres

S4 [Changes from S3A]:
All belts upgraded to"Ornatus-X" Tritanium/Polaryte-Iso Composite Alloy Armour package with and Depleted-Citadrite insert. Main belt increased to 11 metres, secondary belt increased to 2.4 metres, tertiary belt increased to 1.2-.1.3 metres

S5A: [Changes from S4]:
All belts upgraded to"Ornatus-XA" Tritanium/Polaryte-Iso Composite Alloy Armour package with enhanced lightweight construction, Self-Repairing Nanoplate and Depleted-Citadrite insert. Main belt reduced to 8.5 metres, secondary belt reduced to 2.1 metres, tertiary belt reduced to < 1 metres

S6 [Changes from S5A]:

S1, S1A, S2, S2A:
Nine triple "A" 805mm MKIV MA-FIMD turrets (main battery), eight double "B" 460mm MKIV MRG turrets (secondary battery), 4x6 (24-pod) top-mounted LRM bay, two 2x6 (12-pod) LRM bays (port & starboard), four 1x4 (4-pod) Torpedo bays (port & starboard bow) capable of launching ELR "Phoenix" and "Harbinger" class WMDs (up to a dozen carried on designated 'planet-killer' vessels), thirty-six 140mm hull-mounted FIMDs, sixty hull-mounted 6-barreled 40mm FIMD Rotary PDS installations, single co-axially mounted, double-barrel 1685mm SMRG Siege Cannon.

S2B, S3A [Changes from S1, S1A, S2, S2A]:
Main battery upgraded to nine triple-barrel"A" 875mm MKVIe MA-FIMD turrets, secondary battery upgraded to "B" 505mm MKVIe MA-FIMD turrets. Sixteen additional PDS installations with 360° Emmitance 5MW PDS-3 LUX Precision Laser batteries. Port & Starboard Bow LRM upgraded to support "HELIX" Torpedoes.

S4 [Changes from S2B, S3A]:
Main battery replaced with nine double-barrel "A" 1028mm MKVIe/HC MA-FIMD turrets. Co-axial armament replaced with single-barrel 2428mm SMRG Siege-Cannon with 1685mm Sub-Calibre/Sabot capability.

S5A [Changes from S4]:
Main battery replaced with five double-barrel "A" DEW-LUX 'Ion Maser Cannon' Turrets, and two double-barrel "A" 875mm MKVId MA-FIMD turrets. Secondary battery replaced with 11 "B" 505mm MKVId MA-FIMD turrets. LRM Launching system upgraded with improved magnetic assistance and AHS integration for targeting using Real-Time tracking via CoRE's fire control system for use with "BVR-HELIX" Sub-Space missiles. Co-axial armament replaced with twin, double-barrel 1685mm SMRG Siege-Cannons with improved magnetic containment/assistance and cooling capability for increased rate of fire.

S6 [Changes from S5A]:

S1: PARALAX MKII Omni Sensor/Electronic Warfare Suite (conning tower mast), OPTIUS X12 Fire Control M-LADAR Array (conning tower), OPTIUS X16 Spatial Tracking Array (lower-midships & bow mast). Ship-Board-Computer (SBC) V1.2 with limited integration

S1A, S2, S2A, S2B [Changes from S1]: FCS upgraded to OPTIUS X14A Fire Control M-LADAR/SDD Array (conning tower), STA package upgraded to OPTIUS X16E/A Spatial Tracking Array (lower-midships & bow mast). Ship-Board-Computer (SBC) V1.3 with full integration

S3A [Changes from S1A, S2, S2A, S2B]: Full system overhaul: PARALAX MKV OS/EWS package with Adaptive Harmonics. FCS upgraded to OPTIUS X16 Fire Control M-LADAR/SDD (Space Density Distortion) Array (conning tower), STA package upgraded to OPTIUS X17A Spatial Tracking Array (lower-midships & bow mast). Full Enhanced Logic Interface Version 3.0 (E.L.I.3) (Ellie) with semi-sentience integration

S4 [Changes from S3A]: FCS modified to OPTIUS X16/LSR (Long Stand-off Range) spec. Fire Control M-LADAR/SDD Array (conning tower). Full Enhanced Logic Interface Version 3.1S (E.L.I.3.1) (Ellie) with sull sentience sub-routines integration. First UTN Warship to feature semi-sentient AI.

S5A [Changes from S4]: Full system overhaul: PARALAX MKXI OS/EWS package with Adaptive Harmonics. FCS upgraded to OPTIUS X24/LSR Fire Control M-LADAR/SDD Array (conning tower), STA package upgraded to OPTIUS X22A/E Spatial Tracking Array (lower-midships & bow mast). Full Cerebral Reflex Emulator Integration (CoRE). First UTN Warship to feature fully sentient / Self-Aware AI.

S6 [Changes from S5A]: Classified.

S1: Eight MOD8 HSG-8 "Fortress" Shield Generators (7500Mw average, 224,000 PSU)

S1A [Changes from S1]: Eight MOD8 HSG-8E "Fortress-E" Shield Generators (7620MW average, 248,000 SU). Shield capacitance efficiency greatly improved.

S2, S2A, S2B [Changes from S1A]: Eight MOD9 HSG-9A "Citadel-A" Shield Generators (8400MW average, 306,000 SU). Capacitance efficiency improved further

S3A [Changes from S2, S2A, S2B]: Eight MOD10 HSG-10A/AHS "Temple-A" Shield Generators using PARALAX Adaptive Harmonics System for field Emmitance (8600MW average, 620,000 SU). First to use full AHS-Integration, capacitance efficiency further improved.

S4 [Changes from S3A]: Eight MOD10 HSG-10E/AHS "Temple-E" Shield Generators using PARALAX Adaptive Harmonics System for field Emmitance (8600MW average, 620,000 SU). Enhanced AHS Subsytems.

S5A [Changes from S4]: Six MOD11 HSG-11A/AHS "Terra's Shield-A" Shield Generators using PARALAX Adaptive Harmonics System for field Emmitance (9,600MW average, 1,024,000 PSU). Further Enhancement to AHS Subsystems. Capacitance efficiency improved significantly.

S6 [Changes from S5A]: Classified.


Development on a new warship to replace the aging Retribution-class battlecruiser began in 3598 after a Naval Review, with designs for a new class put forward by Naval Draftsmen in 3601. The review called for a fast battlecruiser capable of operating with forward cruiser elements, whilst maintaining the offensive and defensive capabilities expected of the class; effectively bridging the gap between the heavier Revenge-class battleships and the smaller Vengeance-class heavy cruisers. Designs for the Endeavour-class were put forward to the three major Shiprwights, with A.R.A.S Shipyards Lorentis subsequently being awarded the contract to build the new vessel. Improving on its predecessor in every aspect, Endeavour-class carry state-of-the art technology and are considered highly by their crews. As of 4015 A.D, Endeavour-class warships made up the backbone of the Federal Navy's heavy strike capability and capital fleet and had recieved many major upgrades over its long, 4-century service.

The S1A designation was given to Endeavour-class battlecruisers that recieved an upgrade package standardised in 3620 A.D to address concerns over the class's field performance on trials. The major changes include a significantly more efficient shield generator and improved electronic Systems including the first fully integrated non-human control platform based on the Ship-Board-Computer Operating System.

Officially standardised in 3646, S2 designation was given to vessels that received numerous upgrades, primarily to defensive aspects in light of growing tensions with other Aquarian nations. Using an upgraded shield generator and significantly increased armour thickness, Series 2 Endeavours were heavier than Series 1s but better protected. This upgrade was deemed necessary if a war with Phoenix was to break out, primarily in response to the larger, then better protected CEG-era Battleships employed bu the Phoenix Navy.

Implemented 10 cycles after the S2 design standardisation, S2A designation was given to Series 2 vessels that received an upgraded drive package to address concerns of the Series's higher mass and keep up with advances in Light Cruiser designs. Series-2A Endeavours also recieved the latest Jump Drive technology, further enhancing their inter-sector range.

In 3705 A.D, vastly deteriorating relations with the Aquarius Cluster's other major human power; the Phoenix Republic, called for a revision to the Endeavour-class. Major upgrades were made to the warship's main battery and for the first time, new Series-2s under S2B classification featured a significantly upgraded powerplant. The improved firepower was considered necessary by UTN Naval Commanders if a war was to break out between the Unified Terran Nations and the Phoenix Republic.

Standarised in 3725 A.D four cycles after war between the UTN and Phoenix Republic broke out, the first of the Series-3 Endeavours classified S3A was major overhaul of the nearly two-century old warship. Series 3A vessels featured an entirely new fire control and eletronic system, incorporating semi-sentient Adaptive Harmonics control systems (based on Enhanced Logic Interface 3.0, or E.L.I.3/ 'Ellie')after A.I laws were relaxed in the early 38th century. Major revisions to the vessel's armour were made. Implementing Polaryte-Iso composite non-metalic fibres to reduce weight and increase kinetic absorbtion, the resulting belt thickness was reduced to lower the weight of the vessel and increase mobility at little to no expense of protection. Series 3A vessels feature full AHS integration, including in a significantly improved shielding array based on the AHS-capable MOD10 "Temple" platform.

The result of this upgrade package was a major increase in shielding potency, firepower and combat efficiency. The Series 3A remains the most successful and numerous revision of the Endeavour-class in history, with 60 vessels built. This version served extensively in the UTN-Phoenix conflict.

In 3825 A.D, 100 cycles after the Series 3 introduction, and after the war with Phoenix had passed its climax - UTN Federal Navy command ordered a major upgrade of the now aging Series 3A Endeavour. The upgrade planned to produce a 'Super Battlecruiser' with major overhauls to firepower, defence and the first use of a fully sentient Artifical Intelligence - which was deemed necessary after the outstanding performance of the first 'Ellie' equipped Endeavour-S3A. The project was ultimately a failure due to enrormous costs of production and operation and the Series-4 were considered by their captains to be "too heavy" and "cumbersome" to operate, despite having some of the best and most potent technology available at the time. The Project was canceled with only 8 vessels built, due to economic pressure on the UTN after the Invasion of Phoenix in 3776 A.D.

Drafted in 4003 A.D, shortly after the turn of the 4th Millenium, the S5A was commissioned to revise the failed Series 4 Endeavours and produce a new, fast battlecruiser with the latest technology available to the Federation at the time. The Series 5 project borrowed signficant design and system upgrades and technology from the legendary 'Pathfinder', and Captain Ronin Kociero personally oversaw the project. Considered an entirely new design, Series-5A Endeavours are the first UTN warships to feature an entirely Directed Energy Weapon main battery; based on experimental 'Ion Maser Cannon' technology. In addition, the series is the first UTN warship to feature a Reactionless drive package for unparraleleld space mobility. In order to meet the new design's strict mass requirements, the carrier-capability of the warship was reduced to only a single escort corvette and reductions to strikecraft and gunship docking facilities.

Combined with reduced armour thickness (mitigated by significant improvements to armour composition and design) and improved propulsion and powerplant, the Series 5 is one of the fastest and most agile capital ships ever built by the UTN. The class was designed to 'sharpen the edge' of the Federal Navy's sword well into the 4th Millenium. Unfortunately, due to increased cost and complexity, only 20 Series-5As were completed by the time of the start of the Radacri wars in 4015 A.D - not enough to make any significant difference in the ultimate fate of the Federation.

No information is available for this variant.

(Capital) Endeavour-class Battlecruiser
(Capital) Endeavour-class Battlecruiser
(Capital) Endeavour-class Battlecruiser
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