13 million per year, if including maintance of electronics or anything aboard with spares is quite a reasonable or good price.Egypt will pay 260 million euros for maintenance and integrated Logistic Support services for their 2 FREMM class frigates in a 10-year agreement.
Do we know the cost regarding maintenance and other related services of the I-Class or Ada-class?
But i am doubt it, this price should be for dockings, surveys and not the materials spent for maintenance, or spare parts or man-hours spent by 3rd parties in repairs. These items are not foreseeable.
We wouldn't get such a price for Turkish ship anytime soon, the maintenance is carried out by Naval shipyards and spare part processes are managed by TN a nd ILS outsourced to STM in some cases. Pakistan's Milgem could be a reference if they disclose the agreement for maintanance and ILS.