IKS T'Ong
The IKS T'Ong was a Klingon  battle cruiser that was in service to the Klingon Imperial Fleet in the late 23rd century. 

Sometime before 2290, the T'Ong was dispatched on a "crucial" long-range mission from the Klingon Empire under the command of Captain K'Temoc. Due to the long travel time involved, the T'Ongs crew was placed into cryogenic sleep for the journey. The crew awakened, unaware that the Empire and the Federation were no longer at war. The cruiser returned and was heard from in 2365, when the ship sent out an automated signal directed to the Klingon High Command. 

The T'Ongs signal was also picked up by Starbase 336, notifying the Federation of its location as well. Realizing the danger to lightly-defended Federation colonies in the sector, including those in the Boradis system, the  was dispatched to intercept the T'Ong, with Federation special emissary K'Ehleyr as an adviser. It was initially believed that the destruction of the T'Ong was unavoidable once the revived Klingons were confronted by their former adversary. 

The Enterprise confronted the T'Ong when Lt. Commander Data picked it up on sensors but the T'Ong fired its phasers at the Enterprise causing no damage to its shields. The T'Ong then cloaked and went to warp. The Enterprise over took the Klingon ship at warp 8, during which the T'Ong dropped out of warp and decloaked. The T'Ong fired its phasers again causing no damage to the Enterprises shields. 

The T'Ongs crew eventually stood down when Lieutenant Worf masqueraded as the captain of the Enterprise and convinced Captain K'Temoc that the Federation and the Klingon Empire were now at peace. K'Ehleyr took command of the vessel and  the crew to the 24th century while waiting for the  to escort the ship back to Qo'noS. ()

Personnel

Appendices

Background information 
According to the script for the episode, the pronunciation for T'Ong was "TOONG". 

Footage of the Klingon battle cruiser is reused from  with added disruptor and cloaking device effects. ()

The "war" referred to was most likely the Federation-Klingon cold war due to information revealed in .

Apocrypha 
The  RPG sourcebook gives its registry as IKC-7713.

External link

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TOng