The Mark Soch station was a type of modular facility used in the Klingon Empire after being developed by the Science Institute on Mempa V. By 2269, the Mark Soch station had become the most used type of modular facility for dilithium mining facilities, but the mining facility in Beta Thoridar's asteroid belt continued using the Jorvok stations as the Jorvoks broke down less frequently and didn't require a Science Institute specialist to fix it. (ST novella: The Unhappy Ones)