@NathanpmYoung how are you defining "severely"? This article from Politico is fairly damning...

@vitamind @NathanpmYoung see here also from the UK MoD:

"The degraded rail crossing capacity almost certainly caused significant temporary disruption to Russian military logistics operations and potentially, Crimea's fuel supply. Russia will almost certainly be forced to replace the rail ferry service as soon as possible, likely impacting its wider maritime logistics operations, or risk relaxing its procedures by using the rail bridge to transit fuel and explosive stores. The Ukrainian strike on the ferry crossings and a subsequent attack on a nearby fuel depot, highlights again the vulnerability of the Strait to Ukrainian interdiction, despite Russia's significant investment in security and air defence"