Average Warship Age (2018)
This began as a quick look at the average age of the warships of the Russian navy, but the results were interesting so I expanded it to include the top dozen navies. For simplicity's sake, I only considered the following vessels: carriers (including flattop amphibious ships), submarines (excluding ballistic missile submarines), and surface combatants of over 100 meters in length (excluding coast guard and training ships). In the national breakdowns I further separate surface combatants into "large" and "small," with the former being ships of at least 150 meters in length. Given that warships are generally built with an intended service life of around thirty years, we can predict that a healthy fleet should have an average service life of around fifteen years. A figure noticeably higher than that reveals that the fleet is unable to replace aging ships, while a significantly lower number indicates that the fleet is undergoing rapid expansion. However, this on...