But Russia argues that when it ratified the UNLOS Convention, under which the case was brought, "it does not accept the procedures provided for in Section 2 of Part XV of the Convention entailing binding decisions with respect to disputes . . . concerning law-enforcement activities in regard to the exercise of sovereign rights or jurisdiction".
As the ship was protesting in waters included in Russia's exclusive economic zone, there was no case to be brought against it and Moscow does not recognise the court's jurisdiction.
The Russian side "confirms its refusal to take part in this arbitration and abstains from providing comments both on the substance of the case and procedural matters".
Russian Federal Security Service agents captured the 624-dwt Dutch-flagged pleasure craft Arctic Sunrise in international waters after a protest against an oil platform. Those on board were detained in Russian prisons for two months in 2013.
The five-member arbitration panel, based in Vienna, ruled in 2015 that Russia was liable under the UN Convention on the Law of the Sea (UNCLOS) and has now put a price on damages to the ship, as well as the wrongful arrest and suffering of 30 people aboard.
"This decision makes clear that ships in international waters cannot be forcibly boarded and those aboard arrested at a whim," Dutch Foreign Minister Bert Koenders said in a statement.
Greepeace said the panel's rulings "resoundingly reaffirm the right to peaceful protest at sea."
Any funds Russia pays will be forwarded to Greenpeace International by the Dutch government, the environmental group said. They will go to ship repairs and as compensation for the 30 arrestees.