In general it is very hard to maintain high level of availability and training according to Russian standards Especially in maintenance .This is my experience.
Within two hours preparing any crew on Osa-Ma to perform the firings. (No maintnance, only combat use) Of course, even then you need to train the battalion commander at introductory, in the case of possible failures...
Don't forget that naval version is different . Has no peculiarities with the 3 searching zones , no ground effects and (I assume) longer range from integration of ship long range early warning.
