Did Russia jam GPS signals in Norway and phone services in Latvia and Sweden and during exercise Zapad in September? Apparently there are many indications that they did, and now Secretary-General of NATO Jens Stoltenberg has expressed his concerns about the Russian demonstrations of electronic warfare capabilities.
Ideally, military units have redundant systems so they are able to continue operations despite the application of electronic warfare on the battlefield. This may not always get enough attention during exercises, but at least military units are aware that electronic countermeasures exist, and they have some kind of prepared response to it. Military ships, for example, should be able to navigate safely without GPS.
The civil society is much more vulnerable. For most people cellular phones are crucial in emergency situations, and effective GPS jamming could be dangerous for transportation systems, potentially leading to accidents.
Suspicions are that the Russian GPS jamming in Norway was applied in order to disrupt their own forces during training, whereas the phone jamming in Latvia and Sweden was perhaps a deliberate attempt at disturbing these countries. Regardless, it is dangerous to apply such measures, and it shouldn’t be done without prior notice. The Latvian emergency phone service was shut down for several hours, and although there are no reports of anybody not receiving necessary help during the attack, real people could have suffered as a result.