What would happen if Russia lost most of its Black Sea Fleet?
Short answerUkraine could gain room for coastal manoeuvre and a Snake Island operation, while weak Russian repair capacity would magnify every major loss.
NotesThe answer does not require Ukraine to defeat every Russian ship in a fleet battle. It asks whether Russian losses leave enough local naval power to deny Ukrainian movement by sea. If that deterrent weakens, small-scale maritime manoeuvre and an operation against Snake Island become more plausible. Damage also has an extended effect because local repair infrastructure may be unable to return a major frigate to service quickly.