Endeavor

Number	Name	Converted	Drydocked	Relaunched	Recommissioned	Status
NCC-1716	Endeavor	Star Fleet Division, San Francisco Yards, Earth	13 Sept 2271	14 Nov 2272	13 July 2273	Active
NCC-1718	Excelsior	Vickers Shipbuilding Group Ltd., Cumbria, Earth	28 Nov 2273	01 Dec 2274	15 June 2275	Lost
NCC-1719	Eagle	Star Fleet Division, San Francisco Yards, Earth	26 June 2270	30 Aug 2271	27 Apr 2272	Active
NCC-1720	Lafayette	Star Fleet Division, San Francisco Yards, Earth	11 May 2274	02 June 2275	18 Dec 2275	Active
NCC-1721	Wasp	Newport News Shipbuilding, Virginia, Earth	13 May 2272	11 June 2273	29 Dec 2273	Active
NCC-1723	Ari	Newport News Shipbuilding, Virginia, Earth	22 June 2272	30 Aug 2273	27 Mar 2274	Active
NCC-1724	Saratoga	Vickers Shipbuilding Group Ltd., Cumbria, Earth	07 Apr 2272	21 July 2273	18 Feb 2274	Lost
NCC-1725	Tori	Star Fleet Division, San Francisco Yards, Earth	15 Oct 2272	03 Dec 2273	15 July 2274	Active
NCC-1734	Jupiter	Star Fleet Division, Kuha Keihasalm, Sosma Docks, Arcturus III	SD 8444.5	SD 8522.09	SD 8572.3	Active
NCC-1736	Quindar	Arias Mastac, Prime Dockyards, Daran V	SD 8097.23	SD 8203.34	SD 8254.1	Active
NCC-1738	Androcus	Star Fleet Division, Cameron Naval Facility, Deneb V	SD 8323.76	SD 8465.17	SD 8489.07	Active
NCC-1740	Mondoloy	Star Fleet Division, Kuha Keihasalm, Sosma Docks, Arcturus III	SD 8543.1	SD 8697.26	SD 8731.9	Active
Number	Name	Builder	Laid Down	Launched	Commissioned	Status
NCC-1728	Truxton	Vickers Shipbuilding Group Ltd., Cumbria, Earth	06 Aug 2273	10 Sept 2274	17 Feb 2275	Active
NCC-1729	Confiance	Vickers Shipbuilding Group Ltd., Cumbria, Earth	31 July 2274	18 July 2275	13 Dec 2275	Active
NCC-1730	Bunker Hill	Newport News Shipbuilding, Virginia, Earth	13 Nov 2273	09 Nov 2274	02 Apr 2275	Active
NCC-1731	La Vengeance	Newport News Shipbuilding, Virginia, Earth	01 Aug 2273	01 Oct 2274	17 Apr 2275

This class was representative of Star Fleet's desire to incorporate "new technology" components and systems into ships that were still relatively new at the time. With the exception of CH 1728-31, the Endeavor class consists entirely of heavy cruisers converted from other classes. The oldest ship, Endeavor, had been active 21 Earth years when she entered drydock for refitting; Mondoloy, the newest, had been in service only eight years. The Truxton, Confiance, Bunker Hill and La Vengeance were new-build starships originally ordered as replacements for heavy cruisers of the Bonhomme Richard and original Constitution classes that were lost in the line of duty.

All ships (except the Eagle and Tori) initially operated in subquadrant zero, being homeported at the inner starbases or assigned to system defence forces. Four ships are scheduled to be assigned to the SFRF in 2294.

Class: Most of the ships in this class originally belonged to the Bonhomme Richard (CH 1712) and Achernar (CH 1732) heavy cruiser classes. The first eight ships were constructed as Bonhomme Richard class ships from 2248 to 2252; upgraded to Achernar class specifications in the mid-2260s. CH 1734, 1736, 1738 and 1740 were originally built as Achernar class starships beginning in 2263.

These 14 ships are sometimes referred to as the Truxton class, due to the fact that CH 1728-31 are the only new-build heavy cruisers of this type (see Nomenclature below).

The Eagle (CH 1719) was the first starship converted, entering drydock on 26 June 2270. She was relaunched 23 days ahead of schedule (before many of her subsystems were installed) and immediately assigned to TacFleet - on classified status - for reasons unknown at the time. As a result, she was never listed as lead ship of the class (After declassification it was revealed that the Eagle provided command and control coordination in the unsuccessful Cabria Bay operation).

The Tori (CH 1725) was assigned to TacFleet in 2279. Along with Lafayette and Wasp she defeated the Klingon hunter-killers K'chss and K'utuul during the Taal Tan Offensive of 2283.

The Excelsior (CH 1718) disappeared in 2277 while on a reconnaissance mission outside Federation treaty territory (external to subquadrant 2 south). Investigations into her disappearance remained active until 2281. No cause was determined.

The Saratoga (CH 1724) was damaged beyond repai on SD 8661.4 in the vicinity of Beta Xela. She was the victim of an ambush by four vessels, at least two of which were later determined to be of Klingon origin. Three-hundred seventy three crew members were lost. Klingonese officials denied any knowledge of the incident.

Classification: The first eight ships of this class were originally authorized as heavy cruisers in January 2246 after the outbreak of hostilities which led to the Four Years War. Their conversion to Endeavor specifications was approved in December 2269. Uprating of Jupiter, Quindar, Androcus and Mondoloy approved January 2270; these four ships originally authorized in November 2260. CH 1728-31 ordered 20 March 2271.

Design: These ships are basically identical to those of the Achernar class, with linear instead of circumferential warp drive units and modifications to various internal systems. CH 1728-31 are new-build ships equipped during construction with the systmes listed (except for "Fasfax" III, added later).

Some internal structural modifications were made to the converted ships so that they could better handle the increased speed provided by the LN-52 engines. Extra internal deck bracing and additional pressure absorption systems were installed at key stress areas, such as the interconnecting dorsal, engine support pylons, and selected areas in the upper and lower primary hull. Also, the RSAT/HIRAM force field unit was upgraded to provide increased external protection.

These were the last starships equipped with the "Starmark" series navigational guidance system.

The Quindar is fitted with narrowe, reinforced engine suppoert pylons. These save her about 1000 metric tons in displacement.

All of the converted ships were equipped with SBT-R 44 computer systems prior to their refitting. These units were replaced with "Fasfax" Duotronic II systems. CH 1728-31 were built with "Fasfax". All ships were subsequently equipped with Duotronic III systems beginning in 2280.

These ships were fitted with the Debreu/Lang/Siskiyu Model "H" long-range sensor/deflector, faired into the front end of the secondary hull.

CH 1728-31 were the last Star Fleet cruiser-size vesels to be built without the standardized docking port system.

Builders: The new-build ships Truxton and Confiance (built by Vickers) and Bunker Hill and La Vengeance (Newport News) were each completed in little more than one Earth year.

Engineering: The Endeavor class starships are equipped with LN-52 linear engines. These units provide the highest speed that the structural design of these ships can handle (with minor modifications). The Dennison/Westinghouse LN-52 model is the only self-contained linear engine produced. As in the PB series circumferential units, all engine functions occur with within the engine housing - no intermix shaft assemblies are required. These engines have a much faster rate of dilithium decay than later LN models; as a result, higher warp speeds (above warp factor 8) cannot be sustained as long.

The SBE impulse units and their corresponding computer and secondary systems required some upgrading to permit them to operate effectively within the capabilities of the linear warp system.

Weapons: All ships are scheduled to receive an RSM single mount phaser system (also being fitted in some Achernar class ships) to augment their current RIN-6 phaser banks. Four additional emplacements will be fitted in the secondary hull.

Nomenclature: CH 1728-31 were originally ordered to replace starship hull numbers 1017, 1717, 1708 and 1709 (all lost in the line of duty), and were assigned the names Constellation II, Defiant II, Intrepid II and Valiant II, respectively. However, it was decided in early 2273 to assign the past names only to vessels not classified as heavy cruisers. The names of CH 1728-31 were thus changed to further honor the crews of the lost starships.