Peacetime warships do not show their full electronic hand

Did a Russian aircraft completely jam a US Aegis destroyer in the Black Sea?

The claim is treated skeptically because US and Royal Navy ships near Russia do not reveal their full wartime electronic posture in peacetime.

The assessment is skeptical of Russian claims that an aircraft completely jammed a US Aegis destroyer. Peacetime operations near Russia deliberately avoid revealing full wartime capabilities. A ship may therefore withhold parts of its electronic suite or normal wartime emission posture when an opponent tries to measure or jam it. A peacetime encounter cannot by itself demonstrate how the system would perform in combat.