Information of the crash reverberated around the globe: two Russian fighter jets reportedly dumped gas on a US drone earlier this week earlier than hitting and downing it.Moscow has denied it. Washington dubbed it an “unprofessional” interception. And it has sparked a ratcheting up of confrontational rhetoric between Russia and the US.However why was the encounter “unprofessional” and what are the principles for flying over the area? Euronews requested the specialists.Flying drones over worldwide watersThe Black Sea – which borders Ukraine, Russia, Turkey, Georgia, Romania and Bulgaria – is a serious theatre within the conflict in Ukraine.Since Russia’s full-scale invasion, Moscow has used its navy fleet within the Sea to fireside missiles at Ukrainian cities and to focus on the nation’s power infrastructure.And Ukrainian forces have additionally focused Russian infrastructure and its navy within the area – famously sinking Moscow’s flagship vessel, the Moskva, in April 2022. However, international locations are nonetheless allowed to fly drones and different plane over components of the Black Sea, though not all of it.Benjamyn Scott, an Assistant Professor on the Institute of Air and Area Regulation at Leiden College, advised Euronews that the Black Sea is split into sections: the territorial waters that belong to its bordering international locations and its worldwide waters.In line with Article 87 of the UN Conference on the Regulation of the Seas, worldwide waters, and their airspace, are open to all international locations.Whereas Turkey closed the Bosphorus Strait – a strip of water connecting the Black Sea to the Aegean Sea – to non-regional warships in 2022, the Black Sea remained, successfully, open, that means the US may nonetheless entry the realm’s worldwide airspace by way of its allies.“To enter these worldwide waters, [nations] may undergo the territory of a state,” Scott mentioned.“It will must get prior permission [from the countries], whether or not on an ad-hoc foundation or by way of pre-existing preparations with a purpose to enter this worldwide airspace across the Black Sea.”Drones are a ‘frequent presence’Since Russia launched its full-scale invasion of Ukraine, drones have “develop into a typical presence in worldwide airspace over the Black Sea,” in line with James Patton Rogers, an Affiliate Professor on the Division of Political Science on the Danish Institute for Superior Research.“With the fear that Russia is a resurgent offensive energy, there was a broader improve in US and NATO drone border patrols throughout each the Baltic and Black Sea areas to maintain a watchful eye on Russian actions.”Encounters usually are not uncommon between Russia and NATO plane. Previous to 2022, NATO and Russian planes have been reportedly concerned in a median of 400 interceptions yearly, in line with AP. However what makes Tuesday’s interception distinctive is the accusation from the US that it was “intentional” and “aggressive.”“We all know that the intercept was intentional. We all know that the aggressive behaviour was intentional,” US Basic Mark Milley mentioned after the drone crashed on 14 March.And in line with Scott, there are customary methods to intercept international plane, equivalent to “not flying in a harmful method.”Rogers additionally pointed to the price of the drone as a cause why the encounter was “an escalation”. “A [Reaper surveillance drone] can value as a lot as $30 million [€28 million], and the downing of a US army asset is definitely an escalation,” he mentioned.“The US’ response will possible embrace elevated drone patrols throughout the area, not a lower [in presence].”