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 were available at the time of its launch, and it carried no docking apparatus. Scientific instruments like those used on Soviet space stations filled its orbital module (Oazis-2 plant growth unit) and replaced its docking mechanism (Orion-2 telescope suite). Like the U.S. astronauts aboard Skylab, the Kavkaz crew observed Comet Kohoutek.
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1.8.4.2 Soyuz Ferry Missions to Salyut 3
For information on Salyut operations during these Soyuz missions, see section 2.4.3.





1.8.4.3 Soyuz Ferry Missions to Salyut 4
For information on Salyut operations during these Soyuz missions, see section 2.5.3.



{|cellspacing=5 border="0" Dubbed Soyuz 18a in the West. During ascent, an electrical malfunction in the Soyuz booster prematurely fired two of the four explosive latches holding the core of the first stage and the second stage together. This severed electrical connections necessary for firing the remaining latches. The launch escape system and shroud covering the Soyuz were discarded as normal. When the
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 * width="170px" align="left" |“The April 5 Anomaly”
 * width="385px" align="right" |April 5, 1975
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 * width="555px" align="left" colspan="2" |Vasili Lasarev, Oleg Makarov Crew code name—Ural
 * width="555px" align="left" colspan="2" |Vasili Lasarev, Oleg Makarov Crew code name—Ural